/**
 * BeyondBridge Moodle-style UI CSS
 * Moodle 風格前端樣式
 */

/* ==================== 課程網格 ==================== */
.moodle-course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

/* Bridge Designer */
.bridge-designer-shell {
  display: grid;
  gap: 1rem;
}

.moodle-course-grid.bridge-designer-course-center {
  display: block;
}

.bridge-designer-course-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.9rem;
}

.bridge-designer-course-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid rgba(17, 36, 66, 0.1);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 16px 40px rgba(31, 47, 78, 0.08);
}

.bridge-designer-course-card h3 {
  margin: 0.55rem 0 0.35rem;
  color: #1a365d;
  line-height: 1.2;
}

.bridge-designer-course-card p {
  margin: 0;
  color: #657181;
  line-height: 1.55;
}

.bridge-designer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.75rem;
}

.bridge-designer-meta span {
  border-radius: 999px;
  background: rgba(42, 39, 110, 0.08);
  color: #52616f;
  padding: 0.28rem 0.62rem;
  font-size: 0.78rem;
  font-weight: 800;
}

.bridge-designer-course-card .btn-primary {
  width: fit-content;
  min-height: 42px;
}

.bridge-designer-hero,
.bridge-designer-card,
.bridge-designer-empty,
.bridge-designer-preview,
.bridge-designer-blueprint {
  border: 1px solid rgba(17, 36, 66, 0.1);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 16px 40px rgba(31, 47, 78, 0.08);
}

.bridge-designer-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem;
  background:
    radial-gradient(circle at top right, rgba(83, 143, 121, 0.16), transparent 34%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(248, 250, 246, 0.9));
}

.bridge-designer-hero-main {
  max-width: 720px;
}

.bridge-designer-kicker,
.bridge-designer-status {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  border-radius: 999px;
  background: rgba(42, 39, 110, 0.08);
  color: #2f2a73;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  padding: 0.32rem 0.7rem;
}

.bridge-designer-hero h2,
.bridge-designer-card h3,
.bridge-designer-empty h3,
.bridge-designer-blueprint h3 {
  margin: 0.4rem 0 0.35rem;
  color: #1a365d;
  line-height: 1.18;
}

.bridge-designer-hero p,
.bridge-designer-card p,
.bridge-designer-empty p,
.bridge-designer-preview p,
.bridge-designer-blueprint p {
  margin: 0;
  color: #657181;
  line-height: 1.55;
}

.bridge-designer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.9rem;
}

.bridge-designer-card,
.bridge-designer-empty,
.bridge-designer-preview,
.bridge-designer-blueprint {
  padding: 1rem;
}

.bridge-designer-card {
  display: grid;
  gap: 0.75rem;
}

.bridge-designer-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.bridge-designer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.bridge-designer-meta span,
.bridge-designer-blueprint-assets small {
  display: inline-flex;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.06);
  color: #5c6675;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.26rem 0.6rem;
}

.bridge-designer-card-actions,
.bridge-designer-actions,
.bridge-designer-blueprint-header,
.bridge-designer-modal-footer {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.bridge-designer-empty {
  text-align: center;
}

.bridge-designer-empty .btn-primary {
  margin-top: 0.9rem;
}

.bridge-designer-modal-body {
  background: linear-gradient(180deg, rgba(248, 250, 252, 0.84), rgba(255, 252, 246, 0.74));
}

.bridge-designer-modal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.bridge-designer-field,
.bridge-designer-fieldset {
  display: grid;
  gap: 0.42rem;
  border: 1px solid rgba(17, 36, 66, 0.1);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  padding: 0.85rem;
}

.bridge-designer-field-full {
  grid-column: 1 / -1;
}

.bridge-designer-field span,
.bridge-designer-fieldset legend {
  color: #687382;
  font-weight: 800;
  font-size: 0.82rem;
}

.bridge-designer-field input,
.bridge-designer-field textarea {
  width: 100%;
  border: 1px solid rgba(17, 36, 66, 0.12);
  border-radius: 12px;
  background: #fff;
  color: #1f2933;
  font: inherit;
  padding: 0.72rem 0.8rem;
}

.bridge-designer-checks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
}

.bridge-designer-checks label,
.bridge-designer-publish-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  border-radius: 12px;
  background: rgba(42, 39, 110, 0.06);
  padding: 0.58rem 0.65rem;
  font-weight: 800;
}

.bridge-designer-preview {
  margin-top: 0.9rem;
}

.bridge-designer-blueprint {
  display: grid;
  gap: 0.9rem;
  margin-top: 1rem;
}

.bridge-designer-blueprint-header {
  justify-content: space-between;
  align-items: flex-start;
}

.bridge-designer-blueprint-header small {
  display: block;
  margin-top: 6px;
  color: #687382;
  font-size: 0.86rem;
}

.bridge-designer-blueprint-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.6rem;
}

.bridge-designer-blueprint-actions .btn-primary,
.bridge-designer-blueprint-actions .btn-secondary {
  white-space: nowrap;
}

.bridge-designer-template-picker {
  display: grid;
  gap: 0.35rem;
  min-width: 210px;
  max-width: 260px;
}

.bridge-designer-template-picker label {
  color: #52616f;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.bridge-designer-template-picker select {
  width: 100%;
  min-height: 38px;
  border: 1px solid rgba(17, 36, 66, 0.14);
  border-radius: 10px;
  background: #fff;
  color: #1f2933;
  font-weight: 800;
  padding: 0.45rem 0.6rem;
}

.bridge-designer-export-center {
  display: grid;
  gap: 0.65rem;
  border-top: 1px solid rgba(17, 36, 66, 0.08);
  padding-top: 0.75rem;
}

.bridge-designer-export-center-header,
.bridge-designer-export-job,
.bridge-designer-export-job-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.bridge-designer-export-center-header {
  justify-content: space-between;
  flex-wrap: wrap;
}

.bridge-designer-export-center-header h4 {
  margin: 0;
  color: #1f2933;
}

.bridge-designer-export-jobs {
  display: grid;
  gap: 0.5rem;
}

.bridge-designer-export-job {
  justify-content: space-between;
  align-items: flex-start;
  border: 1px solid rgba(17, 36, 66, 0.08);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.86);
  padding: 0.72rem;
}

.bridge-designer-export-job > div:first-child {
  display: grid;
  gap: 0.2rem;
  min-width: 0;
}

.bridge-designer-export-job strong {
  color: #1a365d;
}

.bridge-designer-export-job small {
  color: #657181;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.bridge-designer-export-preview-line {
  max-width: min(68ch, 100%);
}

.bridge-designer-export-job-actions {
  justify-content: flex-end;
  flex-wrap: wrap;
}

.bridge-designer-export-status,
.bridge-designer-export-progress {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.06);
  color: #52616f;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 0.28rem 0.62rem;
}

.bridge-designer-export-job.is-completed .bridge-designer-export-status {
  background: rgba(47, 125, 84, 0.12);
  color: #256346;
}

.bridge-designer-export-job.is-running .bridge-designer-export-status,
.bridge-designer-export-job.is-queued .bridge-designer-export-status {
  background: rgba(180, 122, 43, 0.12);
  color: #7b5522;
}

.bridge-designer-export-job.is-failed .bridge-designer-export-status,
.bridge-designer-export-error {
  background: rgba(183, 93, 79, 0.12);
  color: #8a4b38;
}

.bridge-designer-export-error {
  width: fit-content;
  border-radius: 10px;
  padding: 0.2rem 0.45rem;
}

.bridge-designer-export-empty {
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.05);
  color: #657181;
  font-weight: 800;
  padding: 0.75rem;
}

.bridge-designer-export-validation {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 28px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.06);
  color: #52616f;
  font-size: 0.76rem;
  font-weight: 900;
  padding: 0.24rem 0.58rem;
}

.bridge-designer-export-validation.is-passed {
  background: rgba(47, 125, 84, 0.12);
  color: #256346;
}

.bridge-designer-export-validation.is-failed {
  background: rgba(183, 93, 79, 0.12);
  color: #8a4b38;
}

.bridge-designer-export-preview-modal {
  display: grid;
  gap: 0.75rem;
}

.bridge-designer-export-preview-head,
.bridge-designer-export-preview-panel {
  display: grid;
  gap: 0.35rem;
}

.bridge-designer-export-preview-head strong {
  color: #1a365d;
  font-size: 1.08rem;
}

.bridge-designer-export-preview-head small {
  color: #657181;
  font-weight: 800;
  overflow-wrap: anywhere;
}

.bridge-designer-export-preview-panel {
  border: 1px solid rgba(17, 36, 66, 0.08);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.88);
  padding: 0.75rem;
}

.bridge-designer-export-preview-panel h4 {
  margin: 0;
  color: #1f2933;
}

.bridge-designer-export-preview-panel p {
  margin: 0;
  color: #52616f;
  font-weight: 700;
  line-height: 1.65;
}

.bridge-designer-export-checks {
  display: grid;
  gap: 0.42rem;
}

.bridge-designer-export-check {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.18rem 0.5rem;
  align-items: center;
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.04);
  padding: 0.5rem 0.6rem;
}

.bridge-designer-export-check span {
  grid-row: span 2;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.07);
  color: #52616f;
  font-size: 0.72rem;
  font-weight: 900;
  padding: 0.18rem 0.46rem;
}

.bridge-designer-export-check strong {
  color: #1f2933;
}

.bridge-designer-export-check small {
  color: #657181;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.bridge-designer-export-check.is-passed span {
  background: rgba(47, 125, 84, 0.12);
  color: #256346;
}

.bridge-designer-export-check.is-failed span {
  background: rgba(183, 93, 79, 0.12);
  color: #8a4b38;
}

.bridge-designer-blueprint-section {
  border-top: 1px solid rgba(17, 36, 66, 0.08);
  padding-top: 0.75rem;
}

.bridge-designer-blueprint-section h4 {
  margin: 0 0 0.65rem;
  color: #1f2933;
}

.bridge-designer-lesson-list,
.bridge-designer-blueprint-assets {
  display: grid;
  gap: 0.55rem;
}

.bridge-designer-lesson-list > div {
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(17, 36, 66, 0.08);
  padding: 0.72rem;
}

.bridge-designer-lesson-list strong {
  display: block;
  color: #1a365d;
  margin-bottom: 0.2rem;
}

.bridge-designer-lesson-list small {
  color: #6b7280;
  font-weight: 700;
}

.bridge-designer-publish-row {
  align-items: flex-start;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(17, 36, 66, 0.08);
}

.bridge-designer-publish-row span {
  display: grid;
  gap: 0.2rem;
}

.bridge-designer-publish-row small {
  display: block;
  width: fit-content;
  line-height: 1.4;
}

.bridge-designer-ai-panel {
  border: 1px solid rgba(17, 36, 66, 0.1);
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(248, 250, 252, 0.95), rgba(255, 252, 246, 0.92));
  padding: 0.85rem;
  display: grid;
  gap: 0.6rem;
}

.bridge-designer-ai-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.bridge-designer-ai-panel-header > div:first-child {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.bridge-designer-ai-note {
  margin: 0;
  padding: 0.65rem 0.75rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(17, 36, 66, 0.08);
}

.bridge-designer-ai-note.is-warning {
  background: rgba(255, 248, 237, 0.92);
  border-color: rgba(183, 93, 79, 0.24);
  color: #8a4b38;
}

.bridge-designer-quality-list {
  display: grid;
  gap: 0.45rem;
}

.bridge-designer-quality-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem;
  align-items: start;
  padding: 0.5rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(17, 36, 66, 0.08);
}

.bridge-designer-quality-dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 999px;
  margin-top: 0.35rem;
  background: #9ca3af;
}

.bridge-designer-quality-item.is-pass .bridge-designer-quality-dot {
  background: #2f7d54;
}

.bridge-designer-quality-item.is-risk .bridge-designer-quality-dot,
.bridge-designer-quality-item.is-fail .bridge-designer-quality-dot,
.bridge-designer-quality-item.is-failed .bridge-designer-quality-dot {
  background: #b75d4f;
}

.bridge-designer-quality-item small {
  display: block;
  color: #657181;
  font-weight: 700;
  margin-top: 0.15rem;
}

.bridge-designer-support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.65rem;
}

.bridge-designer-support-card {
  border: 1px solid rgba(17, 36, 66, 0.08);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.84);
  padding: 0.75rem;
  display: grid;
  gap: 0.45rem;
}

.bridge-designer-support-card pre {
  white-space: pre-wrap;
  margin: 0;
  font: inherit;
  color: #52616f;
}

.bridge-designer-support-card p {
  margin: 0.15rem 0 0;
}

#bridgeDesignerModal .modal-actions {
  position: sticky;
  bottom: 0;
  z-index: 2;
  justify-content: flex-end;
  margin: 1rem -1rem -1rem;
  padding: 0.85rem 1rem;
  border-top: 1px solid rgba(17, 36, 66, 0.1);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}

@media (max-width: 768px) {
  .bridge-designer-hero {
    align-items: stretch;
    border-radius: 16px;
    padding: 0.9rem;
  }

  .bridge-designer-hero,
  .bridge-designer-blueprint-header {
    flex-direction: column;
  }

  .bridge-designer-blueprint-actions {
    width: 100%;
    justify-content: stretch;
  }

  .bridge-designer-template-picker {
    max-width: none;
    width: 100%;
  }

  .bridge-designer-blueprint-actions button {
    flex: 1 1 140px;
  }

  .bridge-designer-hero h2,
  .bridge-designer-card h3,
  .bridge-designer-empty h3,
  .bridge-designer-blueprint h3 {
    font-size: 1.2rem;
  }

  .bridge-designer-grid,
  .bridge-designer-modal-grid {
    grid-template-columns: 1fr;
  }

  .bridge-designer-card,
  .bridge-designer-empty,
  .bridge-designer-preview,
  .bridge-designer-blueprint {
    border-radius: 16px;
    padding: 0.85rem;
  }

  .bridge-designer-card-actions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .bridge-designer-card-actions > button,
  .bridge-designer-actions > button,
  #bridgeDesignerModal .modal-actions > button {
    min-height: 40px;
    padding: 0.55rem 0.5rem;
    border-radius: 12px;
    font-size: 0.8rem;
    white-space: nowrap;
  }

  .bridge-designer-checks {
    grid-template-columns: 1fr 1fr;
  }

  .bridge-designer-ai-panel-header {
    align-items: flex-start;
  }

  .bridge-designer-export-job {
    flex-direction: column;
  }

  .bridge-designer-export-job-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .bridge-designer-support-grid {
    grid-template-columns: 1fr;
  }

  #bridgeDesignerModal .modal-content {
    width: min(100vw, 100%);
    min-height: 100dvh;
    border-radius: 0;
  }

  #bridgeDesignerModal .modal-header {
    padding: 0.9rem 1rem;
  }

  #bridgeDesignerModal .modal-body {
    padding: 0.85rem;
  }

  #bridgeDesignerModal .modal-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    margin: 0.85rem -0.85rem -0.85rem;
    padding: 0.72rem 0.85rem calc(0.72rem + env(safe-area-inset-bottom));
  }

}

.moodle-course-card {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  width: 100%;
  padding: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(248, 244, 236, 0.96) 100%);
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(26, 58, 92, 0.12);
  appearance: none;
  text-align: left;
  color: inherit;
  font: inherit;
  box-shadow: 0 18px 38px rgba(15, 23, 42, 0.08);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  cursor: pointer;
}

.moodle-course-card > .course-cover,
.moodle-course-card > .course-body {
  width: 100%;
  margin: 0;
}

.moodle-course-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 26px 48px rgba(15, 23, 42, 0.14);
  border-color: rgba(26, 58, 92, 0.18);
}

.moodle-course-card:focus-visible {
  outline: 3px solid rgba(45, 43, 107, 0.28);
  outline-offset: 3px;
}

.moodle-course-card .course-cover {
  min-height: 174px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: space-between;
  position: relative;
  gap: 1rem;
  padding: 1.1rem 1.15rem 1.2rem;
  text-align: left;
  color: var(--cream);
}

.moodle-course-card .course-cover-clean {
  justify-content: flex-end;
}

.moodle-course-card .course-cover::after {
  content: "";
  position: absolute;
  inset: auto -32px -42px auto;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.14) 0%, rgba(255,255,255,0) 70%);
}

.moodle-course-card .course-cover-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  position: relative;
  z-index: 1;
}

.moodle-course-card .course-cover-copy {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  position: relative;
  z-index: 1;
}

.moodle-course-card .course-category {
  display: inline-flex;
  align-items: center;
  padding: 0.38rem 0.78rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.12);
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--charcoal);
  line-height: 1;
  white-space: nowrap;
  flex-shrink: 0;
}

.moodle-course-card .enrolled-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.36rem 0.72rem;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(6px);
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.95);
}

.course-cover-settings-card {
  display: grid;
  gap: 1rem;
  margin: 0.35rem 0 0.65rem;
  padding: 1rem;
  border: 1px solid rgba(26, 58, 92, 0.12);
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(248, 244, 236, 0.9)),
    radial-gradient(circle at 86% 10%, rgba(86, 121, 96, 0.1), transparent 36%);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.06);
}

.course-cover-settings-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.85rem;
}

.course-cover-settings-head h4 {
  margin: 0.12rem 0 0.2rem;
  color: var(--charcoal);
  font-size: 1rem;
  line-height: 1.2;
}

.course-cover-settings-head p {
  margin: 0;
  color: var(--gray-600);
  font-size: 0.86rem;
  line-height: 1.45;
}

.course-cover-settings-kicker {
  display: inline-flex;
  color: var(--gray-600);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.course-cover-settings-state {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  padding: 0.34rem 0.68rem;
  border-radius: 999px;
  background: rgba(45, 43, 107, 0.08);
  color: var(--primary);
  font-size: 0.74rem;
  font-weight: 800;
  white-space: nowrap;
}

.course-cover-settings-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.95fr) minmax(260px, 1.05fr);
  gap: 1rem;
  align-items: stretch;
}

.course-cover-settings-preview {
  position: relative;
  min-height: 190px;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid rgba(26, 58, 92, 0.14);
  background:
    linear-gradient(135deg, rgba(26, 58, 92, 0.82), rgba(45, 43, 107, 0.72), rgba(86, 121, 96, 0.7));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.16);
}

.course-cover-settings-preview::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.06), rgba(15, 23, 42, 0.28));
  pointer-events: none;
}

.course-cover-settings-placeholder {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 0.22rem;
  padding: 1rem;
  color: #fff;
}

.course-cover-settings-preview.is-empty .course-cover-settings-placeholder {
  color: rgba(255, 255, 255, 0.9);
}

.course-cover-settings-placeholder strong {
  font-size: 1.1rem;
  line-height: 1.15;
}

.course-cover-settings-placeholder span {
  font-size: 0.8rem;
  opacity: 0.84;
}

.course-cover-settings-fields {
  display: grid;
  gap: 0.74rem;
  align-content: start;
}

.course-cover-action-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.58rem;
}

.course-cover-action-row > button {
  min-width: 0;
  min-height: 42px;
  padding: 0.58rem 0.72rem;
  justify-content: center;
  white-space: nowrap;
}

.course-cover-upload-status {
  margin: -0.24rem 0 0;
  color: var(--gray-600);
  font-size: 0.78rem;
  line-height: 1.35;
}

.course-cover-range-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.58rem;
}

.course-cover-range-grid label {
  display: grid;
  gap: 0.32rem;
}

.course-cover-range-grid label span {
  color: var(--gray-600);
  font-size: 0.78rem;
  font-weight: 800;
}

.course-cover-range-grid input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
}

.moodle-course-card .course-cover-copy h3 {
  font-size: 1.22rem;
  font-weight: 700;
  line-height: 1.3;
  margin: 0;
  color: inherit;
  text-wrap: balance;
}

.moodle-course-card .course-cover-copy p {
  margin: 0;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.76);
  font-weight: 600;
}

.moodle-course-card .course-body {
  padding: 1.05rem 1.15rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.95rem;
}

.moodle-course-card .course-name {
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.35;
  margin: 0;
  color: var(--charcoal);
}

.moodle-course-card .course-shortname {
  display: none;
}

.moodle-course-card .course-summary {
  font-size: 0.88rem;
  color: var(--gray-500);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.65;
}

.moodle-course-card .course-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.moodle-course-card .course-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.86rem;
  color: var(--gray-600);
  font-weight: 600;
}

.moodle-course-card .course-meta .course-open-link {
  color: var(--olive-deep);
  font-size: 0.8rem;
  font-weight: 700;
}

.moodle-course-card .course-meta .course-open-link svg {
  width: 14px;
  height: 14px;
}

.moodle-course-card .course-progress {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.moodle-course-card .course-progress-bar {
  flex: 1;
  height: 8px;
  background: var(--gray-200);
  border-radius: 999px;
  overflow: hidden;
}

.moodle-course-card .progress-fill {
  height: 100%;
  background: var(--olive);
  border-radius: 999px;
  transition: width var(--transition-base);
}

.moodle-course-card .progress-text {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--olive);
  white-space: nowrap;
}

/* ==================== 課程詳情頁 ==================== */
.course-header {
  position: relative;
  background:
    radial-gradient(circle at top right, rgba(255,255,255,0.32), transparent 24%),
    linear-gradient(135deg, rgba(26, 58, 92, 0.98) 0%, rgba(45, 43, 107, 0.96) 54%, rgba(86, 121, 96, 0.92) 100%);
  padding: 1.4rem;
  border-radius: 28px;
  margin-bottom: 1.5rem;
  overflow: hidden;
  box-shadow: 0 22px 42px rgba(15, 23, 42, 0.12);
  color: var(--cream);
}

.course-header::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 18%, rgba(255, 255, 255, 0.08), transparent 20%),
    radial-gradient(circle at 82% 20%, rgba(255, 255, 255, 0.16), transparent 24%);
  pointer-events: none;
}

.course-hero {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.course-hero-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
}

.course-hero-badges {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
}

.course-header-kicker {
  margin: 0 0 0.45rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 251, 245, 0.7);
}

.course-hero-badges .course-category-badge,
.course-hero-badges .course-hero-badge,
.course-format-badge,
.course-enrolled-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.45rem 0.82rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  color: var(--cream);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(10px);
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
}

.course-header-stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.95rem;
}

.course-header-stat {
  padding: 1rem 1.05rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(12px);
}

.course-header-stat-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(255, 251, 245, 0.68);
}

.course-header-stat-value {
  display: block;
  margin-top: 0.38rem;
  font-size: 1.42rem;
  font-weight: 700;
  color: var(--cream);
}

.course-mobile-more {
  display: none;
}

.course-header .back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.58rem 1rem;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--cream);
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.course-header .back-btn:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.24);
  transform: translateX(-2px);
}

.course-header-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
}

.course-header-info h1 {
  font-size: 2rem;
  margin-bottom: 0.6rem;
  color: var(--cream);
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.course-header-info .course-category-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.42rem 0.82rem;
  background: rgba(255, 255, 255, 0.94);
  color: var(--olive-deep);
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 700;
  box-shadow: 0 10px 18px rgba(15, 23, 42, 0.08);
}

.course-header-info p {
  color: rgba(255, 251, 245, 0.82);
  margin-bottom: 1rem;
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 64ch;
}

.course-header-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.course-header-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.48rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: rgba(255, 251, 245, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 0.82rem;
  font-weight: 600;
}

.course-header-actions {
  display: flex;
  gap: 0.75rem;
  flex-shrink: 0;
  align-items: flex-start;
  flex-wrap: wrap;
}

/* ==================== 課程導航標籤 ==================== */
.course-nav-tabs {
  display: flex;
  gap: 0.4rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.98));
  padding: 0.7rem;
  border-radius: 22px;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(26, 58, 92, 0.08);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.05);
  overflow-x: auto;
}

.course-nav-tabs .nav-tab {
  padding: 0.82rem 1.2rem;
  border: none;
  background: transparent;
  border-radius: 16px;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--gray-500);
  -webkit-text-fill-color: currentColor;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
  white-space: nowrap;
}

.course-nav-tabs .nav-tab:hover {
  background: rgba(45, 43, 107, 0.06);
  color: var(--olive-deep);
  transform: translateY(-1px);
}

.course-nav-tabs .nav-tab.active {
  background: linear-gradient(180deg, rgba(239, 244, 252, 0.98), rgba(229, 238, 250, 0.98));
  color: var(--olive-deep);
  -webkit-text-fill-color: currentColor;
  box-shadow: inset 0 0 0 1px rgba(26, 58, 92, 0.08), 0 10px 18px rgba(26, 58, 92, 0.1);
}

.course-panel {
  display: none;
}

.course-panel.active {
  display: block;
}

/* ==================== 課程章節 ==================== */
.course-section {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 245, 239, 0.98));
  border-radius: 24px;
  margin-bottom: 1.5rem;
  overflow: hidden;
  border: 1px solid rgba(26, 58, 92, 0.08);
  box-shadow: 0 16px 30px rgba(15, 23, 42, 0.05);
}

.course-section.hidden-section {
  opacity: 0.6;
  border-style: dashed;
  border-width: 1.5px;
  border-color: rgba(107, 114, 128, 0.35);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.35rem 1.4rem 1.2rem;
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

.section-header-main {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  min-width: 0;
}

.section-kicker-row {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.76rem;
  border-radius: 999px;
  background: rgba(45, 43, 107, 0.08);
  color: var(--olive-deep);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.section-state-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.34rem 0.68rem;
  border-radius: 999px;
  background: rgba(192, 101, 77, 0.12);
  color: var(--terracotta);
  font-size: 0.72rem;
  font-weight: 700;
}

.section-info .section-title {
  font-size: 1.24rem;
  font-weight: 700;
  margin-bottom: 0.32rem;
  color: var(--charcoal);
  letter-spacing: -0.02em;
}

.section-info .section-summary {
  font-size: 0.92rem;
  color: var(--gray-500);
  line-height: 1.65;
}

.section-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.section-header-side {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.section-meta-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.46rem 0.8rem;
  border-radius: 999px;
  background: rgba(87, 109, 72, 0.08);
  color: var(--olive-deep);
  font-size: 0.76rem;
  font-weight: 700;
}

.section-activities {
  padding: 0.9rem;
}

.no-activities {
  padding: 2.2rem;
  text-align: center;
  color: var(--gray-500);
  font-size: 0.92rem;
  border: 1px dashed rgba(107, 114, 128, 0.2);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.6);
}

.empty-sections {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--gray-400);
}

.empty-sections svg {
  margin-bottom: 1rem;
  opacity: 0.5;
}

.empty-sections p {
  font-size: 1.1rem;
}

.empty-sections .hint {
  font-size: 0.9rem;
  margin-top: 0.5rem;
}

/* ==================== 活動項目 ==================== */
.activity-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: flex-start;
  gap: 1.15rem;
  padding: 1.2rem 1.4rem 1.22rem;
  margin: 0.4rem 0;
  border-radius: 20px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  border: 1px solid rgba(15, 23, 42, 0.08);
  background:
    radial-gradient(circle at top right, rgba(45, 43, 107, 0.05), transparent 32%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(248, 245, 239, 0.9));
  box-shadow: 0 10px 18px rgba(15, 23, 42, 0.04);
}

.activity-item-main {
  flex: 1;
  min-width: 0;
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  align-items: flex-start;
  gap: 1rem;
  padding: 0;
  border: none;
  background: transparent;
  appearance: none;
  text-align: left;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

.activity-item-main:focus-visible {
  outline: none;
}

.activity-item:hover {
  background: rgba(255, 255, 255, 0.98);
  transform: translateY(-2px);
  box-shadow: 0 18px 28px rgba(15, 23, 42, 0.08);
  border-color: rgba(87, 109, 72, 0.16);
}

.activity-item:focus-within {
  background: rgba(255, 255, 255, 0.98);
  transform: translateY(-2px);
  box-shadow: 0 18px 28px rgba(15, 23, 42, 0.08);
  border-color: rgba(87, 109, 72, 0.16);
}

.activity-item.hidden-activity {
  opacity: 0.6;
}

.activity-icon {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.5);
  justify-self: center;
  align-self: flex-start;
  margin: 0;
}

.activity-icon svg {
  width: 18px;
  height: 18px;
}

.activity-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.48rem;
  padding-top: 0.05rem;
}

.activity-meta-row {
  display: flex;
  align-items: flex-start;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.activity-meta-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.26rem 0.6rem;
  border-radius: 999px;
  background: rgba(45, 43, 107, 0.08);
  color: var(--olive);
  font-size: 0.72rem;
  font-weight: 700;
}

.activity-meta-chip.subtle {
  background: rgba(26, 58, 92, 0.05);
  color: var(--text-secondary);
}

.activity-meta-chip.due {
  background: rgba(192, 101, 77, 0.12);
  color: var(--terracotta);
}

.activity-meta-chip.warning {
  background: rgba(212, 165, 116, 0.16);
  color: var(--olive-deep);
}

.activity-info .activity-name {
  display: block;
  font-weight: 700;
  color: var(--charcoal);
  margin-bottom: 0.1rem;
  font-size: 1rem;
  line-height: 1.45;
  word-break: break-word;
}

.activity-info .activity-desc {
  display: block;
  font-size: 0.86rem;
  color: var(--gray-500);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
}

.activity-info .activity-due {
  display: block;
  font-size: 0.8rem;
  color: var(--terracotta);
  margin-top: 0.25rem;
}

.activity-open-chip {
  display: inline-flex;
  align-self: flex-start;
  margin-top: 0.3rem;
  padding: 0.42rem 0.78rem;
  border-radius: 999px;
  background: rgba(45, 43, 107, 0.08);
  color: var(--olive-deep);
  font-size: 0.74rem;
  font-weight: 700;
  line-height: 1;
}

.completed-badge {
  padding: 0.35rem 0.82rem;
  background: var(--success);
  color: var(--white);
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 700;
}

.activity-actions {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: flex-end;
  gap: 0.45rem;
  align-self: flex-start;
  justify-self: end;
  flex-shrink: 0;
  padding: 0;
  margin-top: 0.05rem;
  background: transparent;
  border: none;
  box-shadow: none;
}

.activity-actions .btn-icon-sm {
  width: 36px;
  height: 36px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--gray-500);
}

/* ==================== 橋隊集合 ==================== */
.bridge-attendance-shell {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.bridge-attendance-hero,
.bridge-attendance-card,
.bridge-attendance-active-card {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.96));
  box-shadow: 0 16px 30px rgba(15, 23, 42, 0.05);
}

.bridge-attendance-hero::before,
.bridge-attendance-card::before,
.bridge-attendance-active-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--olive-deep), var(--olive), rgba(255,255,255,0.1));
  pointer-events: none;
}

.bridge-attendance-hero {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem;
}

.bridge-attendance-kicker {
  display: inline-block;
  margin-bottom: 0.35rem;
  color: var(--gray-500);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.bridge-attendance-hero h2,
.bridge-attendance-section-head h3,
.bridge-attendance-active-card h3 {
  margin: 0;
  color: var(--charcoal);
  letter-spacing: -0.02em;
}

.bridge-attendance-hero h2 {
  font-size: 1.35rem;
}

.bridge-attendance-hero p,
.bridge-attendance-section-head p,
.bridge-attendance-active-card p,
.bridge-attendance-hint,
.bridge-attendance-muted {
  margin: 0.4rem 0 0;
  color: var(--gray-500);
  line-height: 1.6;
}

.bridge-attendance-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.65rem;
  flex-wrap: wrap;
  flex-shrink: 0;
}

.bridge-attendance-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
}

.bridge-attendance-metrics > div {
  padding: 1rem;
  border-radius: 18px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 12px 22px rgba(15, 23, 42, 0.04);
}

.bridge-attendance-metrics span {
  display: block;
  color: var(--gray-500);
  font-size: 0.78rem;
  font-weight: 800;
}

.bridge-attendance-metrics strong {
  display: block;
  margin-top: 0.25rem;
  color: var(--olive-deep);
  font-size: 1.55rem;
  line-height: 1;
}

.bridge-attendance-active-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 1rem;
  padding: 1.15rem;
}

.bridge-attendance-code {
  display: grid;
  justify-items: center;
  gap: 0.2rem;
  min-width: 120px;
  padding: 0.8rem 1rem;
  border-radius: 18px;
  background: rgba(45, 43, 107, 0.08);
  color: var(--olive-deep);
}

.bridge-attendance-code span {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--gray-500);
}

.bridge-attendance-code strong {
  font-size: 1.8rem;
  letter-spacing: 0.08em;
  line-height: 1;
}

.bridge-attendance-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1.2fr);
  gap: 1rem;
  align-items: start;
}

.bridge-attendance-card {
  padding: 1.15rem;
}

.bridge-attendance-section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

.bridge-attendance-session-list,
.bridge-attendance-history {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.bridge-attendance-session,
.bridge-attendance-history-item,
.bridge-attendance-success {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  width: 100%;
  padding: 0.85rem;
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--charcoal);
  text-align: left;
}

.bridge-attendance-session {
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.bridge-attendance-session:hover,
.bridge-attendance-session.is-selected {
  transform: translateY(-1px);
  border-color: rgba(45, 43, 107, 0.22);
  background: rgba(239, 244, 252, 0.96);
}

.bridge-attendance-session strong,
.bridge-attendance-history-item strong,
.bridge-attendance-success strong {
  display: block;
  color: var(--charcoal);
  font-size: 0.94rem;
}

.bridge-attendance-session small,
.bridge-attendance-history-item span,
.bridge-attendance-success span {
  display: block;
  color: var(--gray-500);
  font-size: 0.8rem;
  margin-top: 0.2rem;
}

.bridge-attendance-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 0.34rem 0.7rem;
  border-radius: 999px;
  background: rgba(45, 43, 107, 0.08);
  color: var(--olive-deep);
  font-size: 0.78rem;
  font-weight: 800;
  line-height: 1;
  white-space: nowrap;
}

.bridge-attendance-pill.is-live,
.bridge-attendance-pill.is-active,
.bridge-attendance-pill.is-present {
  background: rgba(34, 197, 94, 0.14);
  color: #166534;
}

.bridge-attendance-pill.is-late {
  background: rgba(245, 158, 11, 0.16);
  color: #92400e;
}

.bridge-attendance-pill.is-absent,
.bridge-attendance-pill.is-expired {
  background: rgba(239, 68, 68, 0.12);
  color: #991b1b;
}

.bridge-attendance-pill.is-excused,
.bridge-attendance-pill.is-closed {
  background: rgba(100, 116, 139, 0.12);
  color: #475569;
}

.bridge-attendance-record-table {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.bridge-attendance-record-table table {
  min-width: 720px;
}

.bridge-attendance-person {
  display: grid;
  gap: 0.12rem;
}

.bridge-attendance-person span {
  color: var(--gray-500);
  font-size: 0.78rem;
}

.bridge-attendance-status-select {
  min-width: 128px;
  padding: 0.55rem 0.85rem;
  border: 1px solid rgba(26, 58, 92, 0.1);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--olive-deep);
  font-weight: 700;
}

.bridge-attendance-checkin {
  max-width: 720px;
}

.bridge-attendance-checkin-form {
  display: grid;
  gap: 0.9rem;
}

.bridge-attendance-checkin-form .form-group {
  margin-bottom: 0;
}

.bridge-attendance-checkin-form .btn-primary {
  width: fit-content;
}

.bridge-attendance-modal .bridge-attendance-modal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.bridge-attendance-modal .form-group {
  margin-bottom: 0;
}

.bridge-attendance-gps-fields {
  display: grid;
  gap: 0.85rem;
  margin-top: 0.9rem;
  padding: 0.9rem;
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-radius: 18px;
  background: rgba(239, 244, 252, 0.58);
}

.bridge-attendance-gps-fields[hidden],
.bridge-attendance-code-field[hidden] {
  display: none !important;
}

.bridge-attendance-location-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

@media (max-width: 768px) {
  .bridge-attendance-hero,
  .bridge-attendance-active-card {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: stretch;
    padding: 0.9rem;
    border-radius: 18px;
  }

  .bridge-attendance-actions,
  .bridge-attendance-active-card > .btn-secondary {
    width: 100%;
  }

  .bridge-attendance-actions .btn-primary,
  .bridge-attendance-actions .btn-secondary,
  .bridge-attendance-active-card > .btn-secondary,
  .bridge-attendance-checkin-form .btn-primary {
    width: 100%;
    min-height: 40px;
    border-radius: 13px;
    white-space: nowrap;
  }

  .bridge-attendance-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.55rem;
  }

  .bridge-attendance-metrics > div,
  .bridge-attendance-card {
    padding: 0.78rem;
    border-radius: 16px;
  }

  .bridge-attendance-layout,
  .bridge-attendance-modal .bridge-attendance-modal-grid,
  .bridge-attendance-location-row {
    grid-template-columns: 1fr;
  }

  .bridge-attendance-section-head {
    margin-bottom: 0.72rem;
  }

  .bridge-attendance-code {
    justify-items: start;
    min-width: 0;
  }

  .bridge-attendance-session,
  .bridge-attendance-history-item,
  .bridge-attendance-success {
    padding: 0.72rem;
    border-radius: 14px;
  }
}

/* ==================== 參與者列表 ==================== */
.course-roster-workspace {
  gap: 1.25rem;
  width: min(100%, 1540px);
  max-width: calc(100vw - 3rem);
}

.management-detail-page.course-roster-workspace {
  width: 100%;
  max-width: none;
}

.course-roster-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.course-roster-hero {
  margin-bottom: 0;
}

.course-roster-title {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.45rem);
  line-height: 1.15;
  color: var(--cream);
  text-wrap: balance;
}

.course-roster-copy {
  margin: 0;
  max-width: 760px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.98rem;
  line-height: 1.7;
}

.course-roster-layout {
  display: grid;
  grid-template-columns: minmax(780px, 1fr) minmax(300px, 380px);
  gap: 1.25rem;
  align-items: start;
}

.course-roster-main-card,
.course-roster-side-card {
  min-width: 0;
  overflow: hidden;
}

.course-roster-card-head,
.course-roster-side-card-body {
  padding: 1.15rem 1.15rem 0;
}

.course-roster-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
}

.course-roster-card-body {
  padding: 0.9rem 1.15rem 1.15rem;
}

.course-roster-side {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
}

.course-roster-side-card-body {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-bottom: 1.15rem;
}

.course-roster-side-actions {
  margin-top: -0.15rem;
}

.course-roster-side-card .bridge-primary-btn,
.course-roster-side-actions .bridge-secondary-btn {
  white-space: nowrap;
}

.course-roster-main-card .participants-list {
  gap: 0;
}

.course-roster-main-card .participants-table-shell,
.course-roster-main-card .participants-directory-shell {
  padding: 0;
  border: none;
  background: transparent;
  box-shadow: none;
}

.course-roster-main-card .participants-table-shell {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
}

.course-roster-main-card .participants-table {
  margin-top: -0.25rem;
  min-width: 1180px;
}

@media (max-width: 1080px) {
  .course-roster-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .course-roster-card-head,
  .course-roster-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .course-roster-main-card .participants-table {
    min-width: 920px;
  }
}

.participants-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.participants-table-shell {
  padding: 0.85rem;
  border-radius: 22px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.94));
  box-shadow: 0 18px 32px rgba(15, 23, 42, 0.06);
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}

.participants-table {
  border-collapse: separate;
  border-spacing: 0 0.7rem;
  width: 100%;
  min-width: 1180px;
  table-layout: fixed;
}

.participants-table thead th {
  background: transparent;
  border-bottom: none;
  padding-top: 0.25rem;
  padding-bottom: 0.45rem;
}

.participants-table td {
  background: rgba(255, 255, 255, 0.82);
  border-top: 1px solid rgba(26, 58, 92, 0.06);
  border-bottom: 1px solid rgba(26, 58, 92, 0.06);
  vertical-align: middle;
  white-space: nowrap;
}

.participants-table th:nth-child(1),
.participants-table td:nth-child(1) {
  width: 220px;
}

.participants-table th:nth-child(2),
.participants-table td:nth-child(2) {
  width: 250px;
}

.participants-table th:nth-child(3),
.participants-table td:nth-child(3) {
  width: 140px;
}

.participants-table th:nth-child(4),
.participants-table td:nth-child(4) {
  width: 160px;
}

.participants-table th:nth-child(5),
.participants-table td:nth-child(5) {
  width: 170px;
}

.participants-table th:last-child,
.participants-table td:last-child {
  width: 220px;
  min-width: 220px;
  box-shadow: none;
  text-align: right;
}

.participants-table tbody td:last-child {
  background: rgba(255, 255, 255, 0.82);
}

.participants-table thead th:last-child {
  background: transparent;
}

.participants-table td:first-child {
  border-left: 1px solid rgba(26, 58, 92, 0.06);
  border-radius: 18px 0 0 18px;
}

.participants-table td:last-child {
  border-right: 1px solid rgba(26, 58, 92, 0.06);
  border-radius: 0 18px 18px 0;
}

.participants-actions-cell {
  width: 220px;
  min-width: 220px;
  white-space: nowrap;
}

.participant-row-actions {
  display: flex;
  gap: 0.45rem;
  flex-wrap: nowrap;
  justify-content: flex-end;
}

.participant-row-actions .btn-sm {
  min-height: 34px;
  border-radius: 10px;
  white-space: nowrap;
}

.participant-actions-muted {
  display: block;
  color: var(--gray-400);
  text-align: center;
}

.participants-directory-shell {
  padding: 1rem;
  border-radius: 24px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.94));
  box-shadow: 0 18px 32px rgba(15, 23, 42, 0.06);
}

.participants-directory-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

.participants-directory-copy {
  display: grid;
  gap: 0.35rem;
}

.participants-directory-kicker {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue-600);
}

.participants-directory-title {
  margin: 0;
  font-size: 1.1rem;
  color: var(--gray-900);
}

.participants-directory-desc {
  margin: 0;
  color: var(--gray-600);
  font-size: 0.95rem;
}

.participants-directory-count {
  flex: 0 0 auto;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  background: rgba(26, 58, 92, 0.08);
  color: var(--blue-700);
  font-weight: 700;
  font-size: 0.875rem;
}

.participants-directory-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.85rem;
}

.participants-member-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.9rem 1rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(26, 58, 92, 0.08);
}

.participants-member-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(45, 91, 136, 0.16), rgba(92, 146, 198, 0.26));
  color: var(--blue-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex: 0 0 auto;
}

.participants-member-copy {
  min-width: 0;
  display: grid;
  gap: 0.18rem;
}

.participants-member-copy strong {
  font-size: 0.96rem;
  color: var(--gray-900);
}

.participants-member-role {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--blue-700);
}

.participants-member-meta {
  font-size: 0.8rem;
  color: var(--gray-500);
}

.user-cell {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--olive);
  color: var(--cream);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.9rem;
}

.participant-name-stack,
.participant-meta-stack,
.participant-date-stack {
  display: flex;
  flex-direction: column;
  gap: 0.18rem;
  min-width: 0;
}

.participant-name-stack strong,
.participant-date-stack strong {
  font-size: 0.92rem;
  color: var(--charcoal);
}

.participant-name-stack span,
.participant-meta-stack span,
.participant-date-stack span {
  font-size: 0.78rem;
  color: var(--gray-500);
  overflow-wrap: normal;
}

.participant-name-stack strong,
.participant-name-stack span,
.participant-meta-stack > span:first-child,
.participant-date-stack strong,
.participant-date-stack span {
  display: block;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.participant-role-chip {
  align-self: flex-start;
  display: inline-flex;
  max-width: 100%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  background: rgba(74, 93, 35, 0.1);
  color: var(--olive-deep);
  font-size: 0.72rem;
  font-weight: 700;
}

.participant-progress-cell {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  min-width: 128px;
}

.mini-progress {
  width: 84px;
  flex: 0 0 84px;
  height: 6px;
  background: var(--gray-200);
  border-radius: 3px;
  overflow: hidden;
  display: inline-block;
  vertical-align: middle;
}

.mini-progress-fill {
  height: 100%;
  background: var(--olive);
  border-radius: 3px;
}

.progress-text-sm {
  font-size: 0.8rem;
  color: var(--gray-500);
  font-weight: 700;
  white-space: nowrap;
}

/* ==================== 成績頁面 ==================== */
.student-grades .grade-summary {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.student-grades,
.teacher-gradebook {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.gradebook-shell {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.98));
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-radius: 24px;
  box-shadow: 0 18px 32px rgba(15, 23, 42, 0.08);
  padding: 1.2rem 1.25rem 1.25rem;
}

.gradebook-shell::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, rgba(45, 43, 107, 0.68), rgba(87, 109, 72, 0.48));
}

.gradebook-shell-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.gradebook-shell-copy {
  display: flex;
  flex-direction: column;
  gap: 0.32rem;
}

.gradebook-shell-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-500);
}

.gradebook-shell-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--charcoal);
}

.gradebook-shell-desc {
  font-size: 0.86rem;
  color: var(--gray-500);
  line-height: 1.55;
  max-width: 64ch;
}

.summary-card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.98));
  padding: 1.15rem 1.1rem 1.1rem;
  border-radius: 18px;
  text-align: left;
  border: 1px solid rgba(26, 58, 92, 0.08);
  box-shadow: 0 12px 22px rgba(15, 23, 42, 0.05);
}

.summary-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, rgba(45, 43, 107, 0.65), rgba(87, 109, 72, 0.44));
}

.summary-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--olive);
}

.summary-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-top: 0.4rem;
}

.type-badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.type-badge.assignment {
  background: var(--terracotta)20;
  color: var(--terracotta);
}

.type-badge.quiz {
  background: #8b5cf620;
  color: #8b5cf6;
}

.teacher-gradebook .gradebook-actions {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0;
  flex-wrap: wrap;
}

.gradebook-table-wrapper {
  background: rgba(255,255,255,0.82);
  border-radius: 20px;
  overflow-x: auto;
  border: 1px solid rgba(26, 58, 92, 0.08);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.7);
}

.gradebook-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

.gradebook-table th,
.gradebook-table td {
  padding: 0.95rem 1rem;
  text-align: center;
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

.gradebook-table th {
  background: linear-gradient(180deg, rgba(245, 247, 250, 0.96), rgba(237, 242, 247, 0.96));
  font-weight: 700;
  font-size: 0.82rem;
  color: var(--gray-500);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.gradebook-table .sticky-col {
  position: sticky;
  left: 0;
  background: rgba(255,255,255,0.98);
  text-align: left;
  z-index: 1;
}

.gradebook-table th.sticky-col {
  background: linear-gradient(180deg, rgba(245, 247, 250, 0.98), rgba(237, 242, 247, 0.98));
}

.grade-cell {
  font-weight: 500;
}

.grade-cell.not-graded {
  color: var(--gray-400);
}

.total-cell {
  background: var(--gray-50);
}

/* ==================== Modal 樣式 ==================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.46);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  padding: 1.25rem;
}

.modal-content {
  position: relative;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.98));
  border-radius: 28px;
  width: 90%;
  max-width: 500px;
  max-height: min(88vh, calc(100vh - 2.5rem));
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(212, 197, 169, 0.24);
  box-shadow: 0 28px 54px rgba(15, 23, 42, 0.22);
}

.modal-content::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--olive-deep) 0%, var(--olive) 44%, rgba(255,255,255,0.12) 100%);
  pointer-events: none;
}

.modal-content.modal-lg {
  max-width: 700px;
}

.modal-content.modal-xl {
  max-width: 900px;
}

.modal-content.modal-generic {
  width: min(90vw, var(--modal-max-width, 600px));
  max-width: var(--modal-max-width, 600px);
}

.modal-content.modal-workspace {
  width: min(calc(100vw - 2rem), var(--modal-max-width, 1080px));
  max-width: var(--modal-max-width, 1080px);
  max-height: min(94vh, calc(100vh - 2rem));
}

.modal-workspace .modal-header {
  padding: 1.25rem 1.6rem 1rem;
}

.modal-workspace .modal-title,
.modal-workspace .modal-header h3 {
  font-size: 1.36rem;
  line-height: 1.25;
}

.modal-workspace .modal-body {
  padding: 1.25rem 1.5rem 1.5rem;
}

.modal-workspace .modal-scroll-body {
  max-height: calc(min(94vh, calc(100vh - 2rem)) - 112px);
}

.modal-content.modal-fullscreen {
  width: min(1280px, calc(100vw - 2rem));
  max-width: none;
  height: min(92vh, calc(100vh - 2rem));
  border-radius: 30px;
}

#ltiLaunchModal.modal-overlay.lti-launch-overlay {
  padding: 0;
  align-items: stretch;
  justify-content: stretch;
  overscroll-behavior: contain;
}

#ltiLaunchModal .modal-content.modal-fullscreen.lti-launch-modal-shell {
  position: fixed;
  inset: 0;
  width: 100vw;
  max-width: none;
  height: 100vh;
  max-height: 100vh;
  margin: 0;
  border-radius: 0;
  border: none;
  box-shadow: none;
}

#ltiLaunchModal .modal-header.lti-launch-modal-header {
  align-items: center;
  padding:
    calc(0.9rem + env(safe-area-inset-top))
    calc(1rem + env(safe-area-inset-right))
    0.9rem
    calc(1rem + env(safe-area-inset-left));
}

#ltiLaunchModal .lti-launch-modal-header .modal-heading {
  gap: 0.2rem;
}

#ltiLaunchModal .modal-body.lti-launch-modal-body {
  display: flex;
  flex: 1;
  padding: 0;
  max-height: none;
  min-height: 0;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.98);
  padding-bottom: env(safe-area-inset-bottom);
}

#ltiLaunchModal .lti-launch-modal-body iframe {
  display: block;
}

#ltiLaunchModal .lti-launch-window-btn {
  min-width: 44px;
  min-height: 44px;
  padding-inline: 0.85rem;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.35rem 1.5rem 1.1rem;
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.9), rgba(248,245,239,0.72));
}

.modal-heading {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.modal-kicker {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-500);
}

.modal-header h3,
.modal-title {
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--charcoal);
  margin: 0;
  letter-spacing: -0.02em;
}

.modal-description {
  margin: 0;
  font-size: 0.88rem;
  color: var(--gray-500);
  line-height: 1.6;
}

.modal-close {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(45, 43, 107, 0.06);
  border: 1px solid rgba(45, 43, 107, 0.08);
  border-radius: 999px;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--gray-400);
  line-height: 1;
  flex-shrink: 0;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.modal-close:hover {
  background: rgba(45, 43, 107, 0.12);
  color: var(--olive-deep);
  transform: rotate(90deg);
}

.modal-body {
  padding: 1.35rem 1.5rem 1.5rem;
  overflow-y: auto;
  flex: 1;
}

.modal-scroll-body {
  max-height: calc(min(88vh, calc(100vh - 2.5rem)) - 110px);
  overflow-y: auto;
}

.modal-header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 1rem 1.5rem 1.2rem;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
  background: rgba(255,255,255,0.66);
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  padding-top: 1.15rem;
  margin-top: 1.15rem;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
}

.quiz-create-shell {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.modal-workspace .quiz-create-shell {
  gap: 1.15rem;
}

.quiz-create-card {
  padding: 1.2rem;
  border-radius: 24px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.94), rgba(248,245,239,0.88));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.58);
}

.modal-workspace .quiz-create-card {
  padding: 1.35rem;
  border-radius: 20px;
}

.quiz-create-card.quiz-create-card-primary {
  background:
    radial-gradient(circle at top right, rgba(87,109,72,0.12), transparent 30%),
    linear-gradient(180deg, rgba(255,255,255,0.96), rgba(248,245,239,0.9));
}

.quiz-create-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.quiz-create-card-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 0.28rem;
}

.quiz-create-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--charcoal);
}

.modal-workspace .quiz-create-card-title {
  font-size: 1.12rem;
}

.quiz-create-card-note {
  margin: 0.35rem 0 0;
  font-size: 0.86rem;
  color: var(--gray-500);
  line-height: 1.65;
}

.quiz-builder-subsection {
  margin-top: 1.25rem;
  padding-top: 1.1rem;
  border-top: 1px solid rgba(26, 58, 92, 0.1);
}

.quiz-builder-subsection-title {
  margin-bottom: 0.75rem;
  color: var(--charcoal);
  font-size: 0.92rem;
  font-weight: 700;
}

.quiz-create-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.quiz-create-actions {
  padding-top: 0.35rem;
}

.activity-builder-shell {
  gap: 1.1rem;
}

.activity-builder-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.modal-workspace .activity-builder-grid,
.modal-workspace .form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(220px, 1fr));
}

.modal-workspace textarea {
  line-height: 1.6;
}

@media (min-width: 1040px) {
  .modal-assignment-builder-modal .activity-builder-shell,
  .modal-quiz-builder-modal .activity-builder-shell {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
    align-items: start;
  }

  .modal-assignment-builder-modal .activity-builder-shell > .quiz-create-card:nth-of-type(1) {
    grid-column: 1;
    grid-row: 1 / span 2;
    align-self: start;
  }

  .modal-assignment-builder-modal .activity-builder-shell > .quiz-create-card:nth-of-type(2) {
    grid-column: 2;
    grid-row: 1;
  }

  .modal-assignment-builder-modal .activity-builder-shell > .quiz-create-card:nth-of-type(3) {
    grid-column: 2;
    grid-row: 2;
  }

  .modal-quiz-builder-modal .activity-builder-shell > .quiz-create-card:nth-of-type(1) {
    grid-column: 1;
    grid-row: 1;
  }

  .modal-quiz-builder-modal .activity-builder-shell > .quiz-create-card:nth-of-type(2) {
    grid-column: 2;
    grid-row: 1;
  }

  .modal-quiz-builder-modal .activity-builder-shell > .quiz-create-card:nth-of-type(3) {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .modal-assignment-builder-modal .activity-builder-shell > .quiz-create-actions,
  .modal-quiz-builder-modal .activity-builder-shell > .quiz-create-actions {
    grid-column: 1 / -1;
  }
}

.activity-builder-shortcut {
  position: relative;
  border-style: dashed;
}

.activity-builder-shortcut::after {
  content: '';
  position: absolute;
  inset: auto 1.2rem 1.2rem auto;
  width: 52px;
  height: 52px;
  border-radius: 18px;
  background: radial-gradient(circle, rgba(87, 109, 72, 0.16), transparent 72%);
  pointer-events: none;
}

.builder-toolbar,
.builder-summary-row,
.builder-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.builder-toolbar {
  margin-bottom: 1rem;
}

.builder-summary-row {
  margin-bottom: 0.95rem;
}

.builder-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.72rem;
  border-radius: 999px;
  border: 1px solid rgba(87, 109, 72, 0.18);
  background: rgba(255, 255, 255, 0.92);
  color: var(--charcoal);
  font-size: 0.78rem;
  font-weight: 600;
  line-height: 1;
}

.builder-kv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.9rem;
  margin-top: 1rem;
}

.builder-kv-card {
  padding: 1rem 1.05rem;
  border-radius: 18px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(248,245,239,0.92));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.72);
}

.builder-kv-card .label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--gray-500);
}

.builder-kv-card .value {
  display: block;
  margin-top: 0.28rem;
  color: var(--charcoal);
  font-size: 1rem;
}

.builder-kv-card p {
  margin: 0.45rem 0 0;
  color: var(--gray-500);
  line-height: 1.6;
  font-size: 0.86rem;
}

.builder-checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.8rem;
  margin-top: 1rem;
}

.builder-checkbox-grid .checkbox-label {
  min-width: 0;
  align-items: flex-start;
  gap: 0.72rem;
  padding: 0.9rem 1rem;
  border-radius: 18px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: rgba(255,255,255,0.84);
}

.builder-checkbox-grid .checkbox-label span {
  line-height: 1.55;
}

.builder-question-list,
.quiz-bank-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.builder-question-empty {
  padding: 1.2rem;
  border-radius: 20px;
  border: 1px dashed rgba(87, 109, 72, 0.22);
  background: rgba(255,255,255,0.72);
  text-align: center;
  color: var(--gray-500);
}

.builder-question-empty strong {
  display: block;
  color: var(--charcoal);
  font-size: 1rem;
}

.builder-question-empty p {
  margin: 0.45rem 0 0;
  line-height: 1.6;
}

.builder-question-card {
  padding: 1.05rem 1.15rem;
  border-radius: 20px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(248,245,239,0.92));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.74);
}

.builder-question-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.builder-question-copy {
  display: flex;
  flex-direction: column;
  gap: 0.42rem;
  min-width: 0;
}

.builder-question-copy h4 {
  margin: 0;
  color: var(--charcoal);
  font-size: 1rem;
  line-height: 1.5;
}

.builder-question-copy p {
  margin: 0;
  color: var(--gray-500);
  line-height: 1.6;
  font-size: 0.88rem;
}

.builder-question-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: flex-end;
}

.builder-option-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.7rem;
  align-items: center;
  margin-bottom: 0.7rem;
}

.builder-matching-row {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto;
}

.builder-choice-row {
  grid-template-columns: max-content minmax(0, 1fr) auto;
}

.builder-ordering-row {
  grid-template-columns: auto minmax(0, 1fr) auto;
}

.builder-cloze-row {
  grid-template-columns: minmax(5rem, 0.55fr) minmax(0, 1fr) auto auto;
}

.builder-option-row input[type="radio"],
.builder-option-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--olive);
}

.correct-option-control {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 38px;
  padding: 0.42rem 0.65rem;
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: 8px;
  background: rgba(248, 250, 252, 0.88);
  color: var(--gray-600);
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.correct-option-control input[type="radio"],
.correct-option-control input[type="checkbox"] {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--olive);
}

.correct-option-control:has(input:checked) {
  border-color: rgba(43, 61, 45, 0.42);
  background: rgba(220, 230, 214, 0.72);
  color: var(--olive);
}

.builder-option-row .option-input,
.builder-option-row .matching-prompt-input,
.builder-option-row .matching-answer-input,
.builder-option-row .ordering-item-input,
.builder-option-row .cloze-id-input,
.builder-option-row .cloze-answer-input {
  width: 100%;
}

.builder-option-row .btn-remove {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.26);
  background: rgba(255,255,255,0.92);
  color: var(--gray-500);
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.builder-option-row .btn-remove:hover {
  border-color: rgba(185, 28, 28, 0.22);
  color: var(--terracotta);
  background: rgba(254, 242, 242, 0.98);
}

.quiz-bank-list {
  max-height: 52vh;
  overflow: auto;
  padding-right: 0.15rem;
}

.quiz-bank-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  padding: 1rem 1.05rem;
  border-radius: 20px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(248,245,239,0.92));
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.quiz-bank-item:hover {
  transform: translateY(-1px);
  border-color: rgba(87, 109, 72, 0.24);
  box-shadow: 0 14px 24px rgba(15, 23, 42, 0.06);
}

.quiz-bank-item-check {
  padding-top: 0.2rem;
}

.quiz-bank-item-check input {
  width: 18px;
  height: 18px;
  accent-color: var(--olive);
}

.quiz-bank-item-copy {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.36rem;
}

.quiz-bank-item-copy h4 {
  margin: 0;
  color: var(--charcoal);
  font-size: 0.98rem;
  line-height: 1.5;
}

.quiz-bank-item-copy p {
  margin: 0;
  color: var(--gray-500);
  line-height: 1.6;
  font-size: 0.86rem;
}

.bulk-import-checkbox {
  min-height: 46px;
  align-items: center;
  gap: 0.65rem;
  padding: 0.72rem 0.85rem;
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.82);
}

.bulk-import-checkbox input {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  accent-color: var(--olive);
}

.bulk-import-template-actions {
  margin-bottom: 0;
}

.bulk-import-preview {
  min-height: 160px;
}

.bulk-import-summary {
  margin-bottom: 0.85rem;
}

.bulk-import-preview-list {
  display: grid;
  gap: 0.78rem;
  max-height: 48vh;
  overflow: auto;
  padding-right: 0.15rem;
}

.bulk-import-preview-item {
  padding: 0.95rem 1rem;
  border-radius: 18px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(248,245,239,0.92));
}

.bulk-import-preview-item.is-invalid {
  border-color: rgba(185, 28, 28, 0.22);
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(254,242,242,0.9));
}

.bulk-import-preview-main {
  display: grid;
  gap: 0.45rem;
  min-width: 0;
}

.bulk-import-preview-main h4 {
  margin: 0;
  color: var(--charcoal);
  font-size: 0.98rem;
  line-height: 1.5;
}

.bulk-import-error-list {
  margin: 0.15rem 0 0;
  padding-left: 1.1rem;
  color: var(--terracotta);
  font-size: 0.86rem;
  line-height: 1.55;
}

.bulk-import-error {
  border-color: rgba(185, 28, 28, 0.22);
}

.assignment-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.inline-form-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.inline-form-row > * {
  min-width: 0;
}

.inline-form-row .fill {
  flex: 1;
}

.modal-section-divider {
  margin: 1.25rem 0;
  border: 0;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
}

#ltiLaunchModal .lti-launch-frame {
  display: block;
  flex: 1;
  width: 100%;
  height: 100%;
  min-height: 0;
  border: none;
  background: var(--white);
}

.question-category-manager {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.question-category-manager .category-item {
  margin-bottom: 0;
}

.question-category-form label {
  display: block;
  margin-bottom: 0.5rem;
}

.checkbox-inline-group {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.checkbox-inline-group label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--charcoal);
}

.forum-header-cluster,
.forum-header-actions,
.forum-card-title-row,
.forum-topic-title-row,
.forum-thread-title-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.forum-header-cluster {
  align-items: flex-start;
}

.forum-header-actions {
  align-items: center;
}

.forum-card-title-row,
.forum-topic-title-row,
.forum-thread-title-row {
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.discussion-modal.discussion-modal-md {
  max-width: 640px;
}

.discussion-modal.discussion-modal-lg {
  max-width: 680px;
}

/* ==================== Activity Viewer ==================== */
.activity-viewer-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  padding: 1.5rem;
  background: rgba(15, 23, 42, 0.72);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.activity-viewer-overlay--compact {
  padding: 0.75rem;
}

.activity-viewer-shell {
  width: min(1180px, 100%);
  height: min(92vh, 100%);
  background: rgba(253, 252, 248, 0.98);
  border: 1px solid rgba(120, 127, 138, 0.18);
  border-radius: 24px;
  box-shadow: 0 28px 60px rgba(15, 23, 42, 0.28);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.activity-viewer-overlay--compact .activity-viewer-shell {
  width: min(1180px, 100%);
  height: min(96vh, 100%);
}

.activity-viewer-overlay--compact .activity-viewer-body {
  padding: 0;
  background: #e5e7eb;
}

.activity-viewer-overlay--compact .activity-viewer-frame {
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.activity-viewer-shell--interactive-video {
  width: min(1600px, calc(100vw - 1rem));
  height: min(97vh, calc(100vh - 1rem));
  border-radius: 28px;
}

.activity-viewer-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: linear-gradient(135deg, rgba(87, 109, 72, 0.16), rgba(255, 255, 255, 0.9));
  border-bottom: 1px solid rgba(107, 114, 128, 0.14);
}

.activity-viewer-title-block h3 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--charcoal);
}

.activity-viewer-title-block p {
  margin: 0.3rem 0 0;
  font-size: 0.88rem;
  color: var(--gray-500);
  line-height: 1.5;
}

.activity-viewer-close {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid rgba(107, 114, 128, 0.14);
  background: rgba(255, 255, 255, 0.86);
  color: var(--charcoal);
  cursor: pointer;
  font-size: 1.5rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  touch-action: manipulation;
}

.activity-viewer-close:hover {
  background: var(--white);
  border-color: rgba(87, 109, 72, 0.25);
}

.activity-viewer-close:focus-visible {
  outline: 3px solid rgba(33, 150, 243, 0.32);
  outline-offset: 2px;
}

.activity-viewer-body {
  flex: 1;
  min-height: 0;
  padding: 1.25rem;
  background: linear-gradient(180deg, rgba(248, 250, 252, 0.95), rgba(241, 245, 249, 0.96));
}

.activity-viewer-body--interactive-video {
  display: flex;
  padding: 0.8rem 0.9rem 0.9rem;
  min-width: 0;
  overflow: hidden;
}

.activity-viewer-body--interactive-video .interactive-video-layout {
  flex: 1 1 auto;
  width: 100%;
  min-width: 0;
  min-height: 0;
}

.activity-viewer-frame {
  width: 100%;
  height: 100%;
  min-height: 320px;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(107, 114, 128, 0.14);
  background: var(--gray-900);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.activity-viewer-embed {
  width: 100%;
  height: 100%;
  border: none;
  background: var(--white);
}

/* 活動追蹤狀態列 */
.activity-tracking-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1rem;
  background: linear-gradient(90deg, #1a3a2a, #2d4a3a);
  color: #a8d8b8;
  font-size: 0.8rem;
  border-radius: 20px 20px 0 0;
  border-bottom: 1px solid rgba(168, 216, 184, 0.2);
}

.tracking-dot {
  width: 8px;
  height: 8px;
  background: #4ade80;
  border-radius: 50%;
  animation: tracking-pulse 2s ease-in-out infinite;
}

@keyframes tracking-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.tracking-text {
  flex: 1;
}

.tracking-timer {
  font-family: 'SF Mono', 'Menlo', monospace;
  font-weight: 600;
  font-size: 0.85rem;
  color: #fff;
  letter-spacing: 0.05em;
}

.activity-tracking-bar + .activity-viewer-embed {
  border-radius: 0 0 20px 20px;
}

.activity-viewer-frame-pdf {
  background: linear-gradient(180deg, rgba(226, 232, 240, 0.94), rgba(241, 245, 249, 0.98));
}

.activity-viewer-pdf-shell {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.activity-viewer-pdf-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid rgba(107, 114, 128, 0.14);
  background: rgba(255, 255, 255, 0.92);
}

.activity-viewer-pdf-toolbar-group {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.activity-viewer-pdf-btn {
  width: 40px;
  height: 40px;
  border: 1px solid rgba(107, 114, 128, 0.16);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.96);
  color: var(--olive-deep);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.activity-viewer-pdf-btn:hover {
  background: var(--white);
  border-color: rgba(87, 109, 72, 0.28);
  transform: translateY(-1px);
}

.activity-viewer-pdf-fit {
  height: 40px;
  border: 1px solid rgba(107, 114, 128, 0.16);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.96);
  color: var(--olive-deep);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 0.85rem;
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  touch-action: manipulation;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.activity-viewer-pdf-fit:hover {
  background: var(--white);
  border-color: rgba(87, 109, 72, 0.28);
  transform: translateY(-1px);
}

.activity-viewer-pdf-btn:focus-visible,
.activity-viewer-pdf-fit:focus-visible {
  outline: 3px solid rgba(33, 150, 243, 0.32);
  outline-offset: 2px;
}

.activity-viewer-pdf-scale,
.activity-viewer-pdf-pages {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--gray-600);
}

.activity-viewer-pdf-canvas-wrap {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.activity-viewer-pdf-page {
  width: min(100%, 960px);
  padding: 0.9rem;
  border-radius: 20px;
  border: 1px solid rgba(107, 114, 128, 0.14);
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
}

.activity-viewer-pdf-page-label {
  margin-bottom: 0.7rem;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--gray-500);
}

.activity-viewer-pdf-page-canvas {
  min-height: var(--pdf-page-placeholder-height, 420px);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(248, 250, 252, 0.92), rgba(241, 245, 249, 0.96));
}

.activity-viewer-pdf-page-canvas.is-loading::after {
  content: '';
  width: 28px;
  height: 28px;
  border-radius: 999px;
  border: 3px solid rgba(30, 58, 92, 0.16);
  border-top-color: var(--navy);
  animation: spin 0.8s linear infinite;
}

.activity-viewer-pdf-page-canvas:has(canvas) {
  min-height: 0;
  background: transparent;
}

.activity-viewer-pdf-page canvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  background: var(--white);
}

.activity-viewer-pdf-loading,
.activity-viewer-pdf-error {
  width: min(100%, 560px);
  margin: auto;
  padding: 1.35rem 1.5rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(107, 114, 128, 0.14);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.1);
  text-align: center;
  color: var(--gray-600);
  line-height: 1.6;
}

.activity-viewer-media {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: var(--gray-900);
}

.activity-viewer-media img,
.activity-viewer-media video {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.activity-viewer-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1.5rem 1.2rem;
  border-top: 1px solid rgba(107, 114, 128, 0.14);
  background: rgba(255, 255, 255, 0.92);
}

.activity-viewer-meta {
  font-size: 0.82rem;
  color: var(--gray-500);
}

.activity-viewer-link {
  color: var(--olive);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
}

.activity-viewer-link:hover {
  color: var(--olive-deep);
}

.interactive-video-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) clamp(360px, 28vw, 440px);
  gap: 0.95rem;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  align-items: stretch;
  overflow: hidden;
}

.interactive-video-stage {
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  overflow: hidden;
}

.interactive-video-player-shell {
  flex: 1 1 0;
  position: relative;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  min-height: 0;
  border-radius: 22px;
  overflow: hidden;
  background: #06111f;
  box-shadow: 0 24px 48px rgba(15, 23, 42, 0.18);
}

.interactive-video-player,
.interactive-video-player iframe,
iframe#interactive-video-player {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
  max-width: 100%;
  border: 0;
  display: block;
}

.interactive-video-stage-controls {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem 1rem;
  align-items: center;
  padding: 0.9rem 1rem;
  border-radius: 20px;
  border: 1px solid rgba(107, 114, 128, 0.14);
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(246,248,252,0.95));
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.08);
}

.interactive-video-stage-controls.is-status-only {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.58rem 0.68rem;
}

.interactive-video-stage-controls.is-status-only .interactive-video-stage-meta {
  order: 2;
  flex: 0 0 auto;
  justify-content: flex-end;
}

.interactive-video-stage-toggle {
  appearance: none;
  border: 1px solid rgba(87, 109, 72, 0.18);
  background: linear-gradient(135deg, rgba(87,109,72,0.18), rgba(125,140,101,0.12));
  color: var(--olive-deep);
  border-radius: 999px;
  padding: 0.8rem 1.1rem;
  min-width: 110px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.interactive-video-stage-toggle:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(87, 109, 72, 0.14);
  border-color: rgba(87, 109, 72, 0.28);
}

.interactive-video-stage-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.interactive-video-stage-mode,
.interactive-video-stage-time {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
}

.interactive-video-stage-mode {
  color: var(--olive-deep);
  background: rgba(87, 109, 72, 0.1);
  border: 1px solid rgba(87, 109, 72, 0.14);
}

.interactive-video-stage-mode[data-mode="open"] {
  color: #0f3f69;
  background: rgba(14,165,233,0.1);
  border-color: rgba(14,165,233,0.16);
}

.interactive-video-stage-time {
  color: var(--gray-600);
  background: rgba(148, 163, 184, 0.08);
  border: 1px solid rgba(148, 163, 184, 0.12);
}

.interactive-video-stage-hint {
  grid-column: 1 / -1;
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--gray-500);
}

.interactive-video-stage-controls.is-status-only .interactive-video-stage-hint {
  order: 1;
  flex: 1 1 auto;
  min-width: 0;
  grid-column: auto;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.interactive-video-sidebar {
  position: relative;
  z-index: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  min-height: 0;
  height: 100%;
  padding: 1rem;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(246,248,252,0.96));
  border: 1px solid rgba(107, 114, 128, 0.14);
  box-shadow: 0 20px 38px rgba(15, 23, 42, 0.1);
  overflow: hidden;
}

.interactive-video-sidebar-head {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.interactive-video-sidebar-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--charcoal);
}

.interactive-video-sidebar-subtitle {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--gray-500);
}

.interactive-video-summary-card {
  padding: 0.95rem 1rem;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(14,165,233,0.12), rgba(59,130,246,0.08));
  border: 1px solid rgba(14,165,233,0.18);
}

.interactive-video-summary-slot,
.interactive-video-sidebar-actions {
  flex: 0 0 auto;
}

.interactive-video-summary-card.is-complete {
  background: linear-gradient(135deg, rgba(16,185,129,0.12), rgba(45,212,191,0.08));
  border-color: rgba(16,185,129,0.2);
}

.interactive-video-summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.interactive-video-summary-item {
  display: flex;
  flex-direction: column;
  gap: 0.18rem;
}

.interactive-video-summary-item span {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.interactive-video-summary-item strong {
  font-size: 1rem;
  color: var(--charcoal);
}

.interactive-video-summary-note {
  margin-top: 0.85rem;
  font-size: 0.86rem;
  color: var(--gray-600);
  line-height: 1.5;
}

.interactive-video-prompt-card,
.interactive-video-idle-card {
  padding: 1rem;
  border-radius: 18px;
  background: rgba(248, 250, 252, 0.98);
  border: 1px solid rgba(148, 163, 184, 0.18);
}

.interactive-video-conversation {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding-right: 0.2rem;
}

.interactive-video-prompt-slot {
  flex: 0 0 auto;
}

.interactive-video-prompt-slot[hidden] {
  display: none !important;
}

.interactive-video-prompt-thread {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.interactive-video-inline-prompt-shell {
  margin-left: 44px;
  max-width: min(100% - 44px, 560px);
}

.interactive-video-prompt-card.is-inline {
  padding: 0.9rem;
  border-color: rgba(26, 40, 133, 0.2);
  background: #ffffff;
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.1);
}

.interactive-video-prompt-card.is-inline .interactive-video-sheet-handle {
  display: none;
}

.interactive-video-prompt-card.is-inline .interactive-video-prompt-head {
  margin-bottom: 0.55rem;
}

.interactive-video-prompt-card.is-inline .interactive-video-prompt-question {
  font-weight: 800;
}

.interactive-video-prompt-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.8rem;
}

.interactive-video-prompt-label,
.interactive-video-prompt-time,
.interactive-video-bubble-kicker {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--gray-500);
}

.interactive-video-question-num {
  display: inline-block;
  margin-right: 0.45rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: #1a2885;
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: none;
}

.interactive-video-prompt-question,
.interactive-video-bubble-text {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--charcoal);
}

.interactive-video-prompt-required,
.interactive-video-idle-copy {
  margin-top: 0.75rem;
  font-size: 0.82rem;
  color: var(--gray-500);
}

.interactive-video-options,
.interactive-video-text-answer {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-top: 0.9rem;
}

.interactive-video-option,
.interactive-video-submit,
.interactive-video-resume-btn,
.interactive-video-defer-btn,
.interactive-video-reply-btn {
  width: 100%;
  appearance: none;
  border: 1px solid rgba(14,165,233,0.18);
  background: rgba(255,255,255,0.98);
  color: var(--charcoal);
  border-radius: 14px;
  padding: 0.85rem 0.95rem;
  text-align: left;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.interactive-video-option:hover,
.interactive-video-submit:hover,
.interactive-video-resume-btn:hover,
.interactive-video-defer-btn:hover,
.interactive-video-reply-btn:hover {
  border-color: rgba(14,165,233,0.38);
  box-shadow: 0 12px 24px rgba(14,165,233,0.12);
  transform: translateY(-1px);
}

.interactive-video-submit,
.interactive-video-resume-btn,
.interactive-video-defer-btn {
  text-align: center;
  background: linear-gradient(135deg, rgba(14,165,233,0.12), rgba(59,130,246,0.12));
}

.interactive-video-defer-btn {
  margin-top: 0.65rem;
  border-color: rgba(107, 114, 128, 0.16);
  background: rgba(255, 255, 255, 0.88);
  color: var(--gray-600);
  text-align: center;
}

.interactive-video-reply-btn {
  margin-top: 0.75rem;
  width: auto;
  min-height: 38px;
  padding: 0.55rem 0.85rem;
  color: #0f3f69;
  background: rgba(14,165,233,0.1);
}

.interactive-video-option.is-selected {
  border-color: #1a2885;
  background: #1a2885;
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 6px 16px rgba(26, 40, 133, 0.28);
}

.interactive-video-option.is-selected:hover {
  border-color: #1a2885;
  background: #232d92;
  color: #ffffff;
  box-shadow: 0 8px 20px rgba(26, 40, 133, 0.35);
}

.interactive-video-prompt-state {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  margin-top: 0.65rem;
  min-height: 28px;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 800;
}

.interactive-video-prompt-state.is-unanswered {
  color: #92400e;
  background: rgba(245, 158, 11, 0.12);
}

.interactive-video-prompt-state.is-incorrect {
  color: #991b1b;
  background: rgba(239, 68, 68, 0.12);
}

.interactive-video-prompt-state.is-correct {
  color: #065f46;
  background: rgba(16, 185, 129, 0.12);
}

.interactive-video-bubble.teacher.needs-reply {
  border-color: rgba(245, 158, 11, 0.2);
  background: rgba(255, 251, 235, 0.82);
}

.interactive-video-bubble-row.is-active-prompt .interactive-video-bubble.teacher {
  border-color: #1a2885;
  background: #eef2fb;
  box-shadow: 0 0 0 2px rgba(26, 40, 133, 0.18);
}

.interactive-video-active-tag {
  display: inline-block;
  margin-left: 6px;
  padding: 2px 8px;
  border-radius: 999px;
  background: #1a2885;
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.interactive-video-inline-answer,
.interactive-video-inline-feedback {
  margin-top: 0.72rem;
  padding: 0.68rem 0.78rem;
  border: 1px solid rgba(26, 40, 133, 0.12);
  border-radius: 14px;
  background: rgba(248, 250, 252, 0.96);
}

.interactive-video-inline-answer-label {
  display: flex;
  align-items: center;
  gap: 0.38rem;
  color: var(--gray-500);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.interactive-video-inline-answer-label span {
  min-height: 20px;
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.42rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.06);
  color: var(--gray-600);
  font-size: 0.68rem;
  letter-spacing: 0;
  text-transform: none;
}

.interactive-video-inline-answer-value {
  margin-top: 0.28rem;
  color: var(--charcoal);
  font-size: 0.94rem;
  font-weight: 800;
  line-height: 1.45;
}

.interactive-video-inline-answer.is-drafted {
  border-color: rgba(14, 165, 233, 0.18);
  background: rgba(239, 246, 255, 0.96);
}

.interactive-video-inline-answer.is-answered {
  border-color: rgba(26, 40, 133, 0.16);
  background: rgba(239, 242, 251, 0.96);
}

.interactive-video-inline-answer.is-correct {
  border-color: rgba(16, 185, 129, 0.2);
  background: rgba(236, 253, 245, 0.96);
}

.interactive-video-inline-answer.is-incorrect {
  border-color: rgba(239, 68, 68, 0.2);
  background: rgba(254, 242, 242, 0.96);
}

.interactive-video-inline-feedback {
  border-color: rgba(86, 121, 96, 0.16);
  background: rgba(245, 247, 243, 0.94);
}

.interactive-video-inline-feedback-text {
  margin-top: 0.28rem;
  color: var(--gray-700);
  font-size: 0.88rem;
  line-height: 1.55;
}

.interactive-video-bubble.learner.is-incorrect {
  border-color: rgba(239, 68, 68, 0.16);
  background: rgba(254, 242, 242, 0.9);
}

.interactive-video-bubble.learner.is-correct {
  border-color: rgba(16, 185, 129, 0.18);
  background: rgba(236, 253, 245, 0.9);
}

.interactive-video-text-answer textarea {
  width: 100%;
  min-height: 130px;
  padding: 0.85rem 1rem;
  border: 1.5px solid rgba(26, 40, 133, 0.18);
  border-radius: 14px;
  background: #ffffff;
  color: var(--charcoal);
  font: inherit;
  font-size: 0.95rem;
  line-height: 1.55;
  resize: vertical;
  box-sizing: border-box;
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.04);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.interactive-video-text-answer textarea::placeholder {
  color: rgba(107, 114, 128, 0.7);
  font-style: italic;
}

.interactive-video-text-answer textarea:hover {
  border-color: rgba(26, 40, 133, 0.32);
}

.interactive-video-text-answer textarea:focus {
  outline: none;
  border-color: #1a2885;
  background: #fcfdff;
  box-shadow: 0 0 0 3px rgba(26, 40, 133, 0.14), inset 0 1px 2px rgba(15, 23, 42, 0.04);
}

.interactive-video-transcript {
  flex: 0 0 auto;
  min-height: 0;
  overflow: visible;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.interactive-video-bubble-row {
  display: flex;
  gap: 0.7rem;
  align-items: flex-end;
}

.interactive-video-bubble-row.learner {
  justify-content: flex-end;
}

.interactive-video-bubble {
  max-width: calc(100% - 44px);
  padding: 0.85rem 0.95rem;
  border-radius: 18px;
  background: rgba(255,255,255,0.98);
  border: 1px solid rgba(148, 163, 184, 0.18);
}

.interactive-video-bubble.teacher.subtle {
  background: rgba(248,250,252,0.96);
}

.interactive-video-bubble.learner {
  background: linear-gradient(135deg, rgba(14,165,233,0.12), rgba(59,130,246,0.1));
  border-color: rgba(14,165,233,0.18);
}

.interactive-video-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.82rem;
  font-weight: 700;
}

.interactive-video-avatar.teacher {
  color: var(--gray-900);
  background: linear-gradient(135deg, rgba(191,219,254,0.95), rgba(125,211,252,0.9));
}

.interactive-video-avatar.learner {
  color: var(--white);
  background: linear-gradient(135deg, rgba(37,99,235,0.92), rgba(14,165,233,0.88));
}

.interactive-video-avatar img {
  width: 70%;
  height: 70%;
  object-fit: contain;
  border-radius: inherit;
}

.interactive-video-empty {
  padding: 1.4rem 1rem;
  border: 1px dashed rgba(148, 163, 184, 0.28);
  border-radius: 18px;
  text-align: center;
  color: var(--gray-500);
  line-height: 1.6;
}

.interactive-video-sidebar-actions {
  display: flex;
}

@media (max-width: 1080px) {
  .activity-viewer-body--interactive-video {
    overflow: auto;
  }

  .activity-viewer-body--interactive-video .interactive-video-layout {
    height: auto;
  }

  .interactive-video-layout {
    grid-template-columns: 1fr;
    height: auto;
    min-height: 0;
    overflow: visible;
  }

  .interactive-video-stage {
    overflow: visible;
  }

  .interactive-video-sidebar {
    height: auto;
    min-height: 0;
  }

  .interactive-video-player-shell {
    flex: 0 0 auto;
    aspect-ratio: 16 / 9;
    min-height: 0;
  }

  .interactive-video-stage-controls {
    grid-template-columns: 1fr;
  }

  .interactive-video-stage-meta {
    justify-content: flex-start;
  }
}

/* ==================== 活動類型選擇 ==================== */
.activity-types-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.activity-type-card {
  padding: 1.25rem;
  background: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: 12px;
  cursor: pointer;
  width: 100%;
  appearance: none;
  text-align: center;
  color: inherit;
  font: inherit;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, opacity 0.2s, transform 0.2s, box-shadow 0.2s;
}

.activity-type-card:hover {
  border-color: var(--olive);
}

.activity-type-card:focus-visible {
  outline: 3px solid rgba(74, 93, 35, 0.22);
  outline-offset: 3px;
}

.activity-type-card.selected {
  border-color: var(--olive);
  background: var(--olive)10;
}

.activity-type-card .type-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.75rem;
}

.activity-type-card .type-icon.tone-olive {
  background: rgba(87, 109, 72, 0.14);
  color: var(--olive);
}

.activity-type-card .type-icon.tone-indigo {
  background: rgba(99, 102, 241, 0.14);
  color: #6366f1;
}

.activity-type-card .type-icon.tone-emerald {
  background: rgba(16, 185, 129, 0.14);
  color: #10b981;
}

.activity-type-card .type-icon.tone-terracotta {
  background: rgba(192, 101, 77, 0.14);
  color: var(--terracotta);
}

.activity-type-card .type-icon.tone-violet {
  background: rgba(139, 92, 246, 0.14);
  color: #8b5cf6;
}

.activity-type-card .type-icon.tone-amber {
  background: rgba(245, 158, 11, 0.14);
  color: var(--warning);
}

.activity-type-card .type-icon.tone-pink {
  background: rgba(236, 72, 153, 0.14);
  color: #ec4899;
}

.activity-type-card .type-icon.tone-sky {
  background: rgba(14, 165, 233, 0.14);
  color: #0ea5e9;
}

.activity-type-card span {
  display: block;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.activity-type-card p {
  font-size: 0.8rem;
  color: var(--gray-500);
}

.activity-form-shell {
  margin-top: 1.5rem;
}

.interactive-video-editor-shell {
  margin-top: 0.5rem;
  padding: 1.35rem;
  border-radius: 24px;
  border: 1px solid rgba(26, 58, 92, 0.1);
  background:
    radial-gradient(circle at top right, rgba(185, 214, 234, 0.24), transparent 38%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(245, 244, 239, 0.94));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.92),
    0 18px 30px rgba(28, 44, 64, 0.08);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.interactive-video-editor-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.interactive-video-editor-head label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--charcoal);
}

.interactive-video-editor-timeline {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.interactive-video-editor-timeline-rail {
  position: relative;
  min-height: 56px;
  border-radius: 999px;
  background:
    linear-gradient(90deg, rgba(26, 58, 92, 0.08), rgba(74, 93, 35, 0.12));
}

.interactive-video-editor-timeline-rail::before {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  top: 50%;
  height: 6px;
  transform: translateY(-50%);
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(73, 93, 153, 0.16), rgba(74, 93, 35, 0.28));
}

.interactive-video-editor-timeline-marker {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  border: none;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.interactive-video-editor-timeline-marker span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 66px;
  height: 32px;
  padding: 0 0.8rem;
  border-radius: 999px;
  background: rgba(26, 58, 92, 0.94);
  color: var(--white);
  font-size: 0.78rem;
  font-weight: 700;
  box-shadow: 0 10px 18px rgba(26, 58, 92, 0.18);
}

.interactive-video-editor-timeline-marker:hover span,
.interactive-video-editor-chip:hover {
  transform: translateY(-1px);
}

.interactive-video-editor-timeline-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.interactive-video-editor-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(26, 58, 92, 0.1);
  background: rgba(255, 255, 255, 0.95);
  color: var(--charcoal);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.interactive-video-editor-chip strong {
  font-size: 0.82rem;
  color: var(--navy-700);
}

.interactive-video-editor-timeline-empty {
  padding: 1rem 1.1rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
  color: var(--gray-600);
  font-size: 0.9rem;
}

.interactive-video-editor-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.interactive-video-editor-card {
  padding: 1.15rem;
  border-radius: 22px;
  border: 1px solid rgba(26, 58, 92, 0.1);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 14px 24px rgba(28, 44, 64, 0.06);
  transition: box-shadow 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.interactive-video-editor-card.is-highlighted {
  border-color: rgba(74, 93, 35, 0.32);
  box-shadow:
    0 0 0 4px rgba(168, 184, 154, 0.16),
    0 18px 30px rgba(28, 44, 64, 0.12);
}

.interactive-video-editor-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

.interactive-video-editor-card-kicker {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: rgba(26, 58, 92, 0.08);
  color: var(--navy-700);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.interactive-video-editor-card-head h4 {
  margin: 0.45rem 0 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--charcoal);
}

.interactive-video-editor-card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.interactive-video-editor-card-time {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(74, 93, 35, 0.12);
  color: var(--olive-700);
  font-size: 0.78rem;
  font-weight: 700;
}

.interactive-video-editor-inline-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem;
  margin-bottom: 0.75rem;
}

.interactive-video-editor-option-list {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.interactive-video-editor-option-row {
  display: grid;
  grid-template-columns: minmax(112px, 148px) minmax(0, 1fr) auto;
  gap: 0.7rem;
  align-items: center;
}

.interactive-video-editor-option-correct {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--gray-600);
}

.interactive-video-editor-option-correct input[type="radio"] {
  accent-color: var(--navy-700);
}

.interactive-video-editor-toggle-row {
  align-items: stretch;
}

.interactive-video-editor-reflection-hint {
  display: flex;
  align-items: center;
  padding: 0.95rem 1rem;
  border-radius: 18px;
  background: rgba(74, 93, 35, 0.08);
  color: var(--gray-600);
  font-size: 0.88rem;
  line-height: 1.55;
}

@media (max-width: 768px) {
  .interactive-video-editor-head,
  .interactive-video-editor-inline-head,
  .interactive-video-editor-card-head {
    flex-direction: column;
    align-items: stretch;
  }

  .interactive-video-editor-option-row {
    grid-template-columns: 1fr;
  }

  .interactive-video-editor-timeline-marker span {
    min-width: 56px;
    font-size: 0.74rem;
  }
}

.lti-tool-info-card {
  margin-top: 1rem;
  background: var(--gray-100);
  border-radius: 12px;
  padding: 1rem;
}

.lti-tool-info-card h4 {
  margin: 0 0 0.35rem;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--charcoal);
}

.lti-tool-info-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.5;
}

.form-checkbox-row {
  margin-top: 0.35rem;
  margin-bottom: 0.5rem;
}

.form-checkbox-row .checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: 16px;
  border: 1px solid rgba(26, 58, 92, 0.1);
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.9));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.8);
  font-size: 0.95rem;
  font-weight: 600 !important;
  color: var(--charcoal);
  cursor: pointer;
  touch-action: manipulation;
}

.form-checkbox-row .checkbox-label:focus-within {
  border-color: rgba(74, 93, 35, 0.28);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.88),
    0 0 0 4px rgba(168, 184, 154, 0.12);
}

.form-checkbox-row .checkbox-label span {
  line-height: 1.45;
}

.form-checkbox-row .checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  accent-color: var(--olive-500);
}

/* ==================== 表單樣式 ==================== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--gray-600);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  font-size: 0.95rem;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, opacity 0.2s, transform 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--olive);
  box-shadow: 0 0 0 3px rgba(45, 43, 107, 0.1);
}

.form-group select,
.group-mode-selector select,
.scorm-modal .form-group select,
.lti-modal .form-group select,
.h5p-modal .form-group select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  padding-right: 3rem;
  border-radius: 16px;
  background-image:
    linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(248, 244, 236, 0.9) 100%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6.5L8 10.5L12 6.5' stroke='%231a3a5c' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat, no-repeat;
  background-position: 0 0, calc(100% - 1rem) 50%;
  background-size: 100% 100%, 14px 14px;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.84),
    0 12px 24px rgba(15, 23, 42, 0.05);
  cursor: pointer;
}

.form-group select:hover,
.group-mode-selector select:hover,
.scorm-modal .form-group select:hover,
.lti-modal .form-group select:hover,
.h5p-modal .form-group select:hover {
  border-color: rgba(74, 93, 35, 0.3);
  background-image:
    linear-gradient(180deg, rgba(255,255,255,1) 0%, rgba(247, 243, 235, 0.96) 100%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6.5L8 10.5L12 6.5' stroke='%234a5d23' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

.form-group select:focus,
.group-mode-selector select:focus,
.scorm-modal .form-group select:focus,
.lti-modal .form-group select:focus,
.h5p-modal .form-group select:focus {
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.88),
    0 0 0 4px rgba(168, 184, 154, 0.14),
    0 16px 30px rgba(15, 23, 42, 0.08);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.form-hint {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-top: 0.5rem;
}

/* ==================== 按鈕樣式 ==================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--olive);
  color: var(--cream);
  border: none;
  border-radius: 8px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  text-align: center;
  flex-shrink: 0;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, opacity 0.2s, transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
  background: var(--olive-deep);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--gray-100);
  color: var(--charcoal);
  border: none;
  border-radius: 8px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  text-align: center;
  flex-shrink: 0;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, opacity 0.2s, transform 0.2s, box-shadow 0.2s;
}

.btn-secondary:hover {
  background: var(--gray-200);
}

.btn-danger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: linear-gradient(180deg, rgba(255, 248, 244, 0.98) 0%, rgba(255, 238, 232, 0.95) 100%);
  color: #9f4434;
  border: 1px solid rgba(191, 90, 67, 0.18);
  border-radius: 8px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  text-align: center;
  flex-shrink: 0;
  box-shadow: 0 10px 18px rgba(191, 90, 67, 0.12);
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, opacity 0.2s, transform 0.2s, box-shadow 0.2s;
}

.btn-danger:hover {
  background: linear-gradient(180deg, rgba(255, 243, 238, 1) 0%, rgba(255, 229, 220, 0.98) 100%);
  color: #863324;
  border-color: rgba(191, 90, 67, 0.24);
  transform: translateY(-1px);
  box-shadow: 0 12px 22px rgba(191, 90, 67, 0.16);
}

.btn-danger:active {
  transform: translateY(0);
  box-shadow: 0 6px 12px rgba(191, 90, 67, 0.14);
}

.btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem 1rem;
  background: var(--gray-100);
  color: var(--charcoal);
  border: none;
  border-radius: 6px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, opacity 0.2s, transform 0.2s, box-shadow 0.2s;
}

.btn-sm:hover {
  background: var(--olive);
  color: var(--cream);
}

.btn-icon {
  width: 36px;
  height: 36px;
  border: 1px solid var(--gray-200);
  background: var(--white);
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, opacity 0.2s, transform 0.2s, box-shadow 0.2s;
}

.btn-icon:hover {
  background: var(--olive);
  color: var(--cream);
  border-color: var(--olive);
}

.btn-icon-sm {
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-400);
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, opacity 0.2s, transform 0.2s, box-shadow 0.2s;
}

.btn-icon-sm:hover {
  background: var(--gray-100);
  color: var(--charcoal);
}

.btn-icon-sm.danger {
  background: rgba(255, 243, 238, 0.86);
  color: #b2513f;
  box-shadow: inset 0 0 0 1px rgba(191, 90, 67, 0.14);
}

.btn-icon-sm.danger:hover {
  background: linear-gradient(180deg, rgba(255, 243, 238, 1) 0%, rgba(255, 229, 220, 0.98) 100%);
  color: #863324;
  box-shadow: inset 0 0 0 1px rgba(191, 90, 67, 0.24), 0 8px 16px rgba(191, 90, 67, 0.16);
  transform: translateY(-1px);
}

.btn-icon-sm.danger:active {
  transform: translateY(0);
  box-shadow: inset 0 0 0 1px rgba(191, 90, 67, 0.18);
}

/* ==================== 資料表格 ==================== */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th,
.data-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--gray-100);
}

.data-table th {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  background: var(--gray-50);
}

.data-table tr:hover {
  background: var(--gray-50);
}

/* ==================== 通用工具類 ==================== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  color: var(--gray-500);
}

.moodle-detail-loading {
  min-height: min(52vh, 460px);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 24px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(248,245,239,0.9));
  box-shadow: 0 18px 34px rgba(15, 23, 42, 0.06);
}

.moodle-detail-loading .loading {
  min-width: 220px;
  padding: 1rem 1.25rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.9);
  color: var(--navy);
  font-weight: 800;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
}

.error {
  text-align: center;
  padding: 2rem;
  color: var(--terracotta);
}

.empty-list {
  text-align: center;
  padding: 3rem;
  color: var(--gray-400);
}

.empty-list-icon {
  margin-bottom: 1rem;
  opacity: 0.5;
}

.page-activity-content {
  line-height: 1.8;
  font-size: 0.95rem;
}

.hidden-file-input {
  display: none;
}

.grade-input-compact {
  width: 80px;
}

.multi-select-tall {
  min-height: 120px;
}

/* ==================== 響應式設計 ==================== */
@media (max-width: 768px) {
  .activity-builder-grid,
  .builder-checkbox-grid,
  .assignment-detail-grid {
    grid-template-columns: 1fr;
  }

  .builder-toolbar,
  .builder-question-actions,
  .builder-question-top {
    flex-direction: column;
    align-items: stretch;
  }

  .builder-toolbar .btn-secondary,
  .builder-toolbar .btn-primary,
  .builder-question-actions .btn-sm,
  .builder-question-actions .btn-primary,
  .builder-question-actions .btn-secondary,
  .builder-question-actions .btn-danger {
    width: 100%;
  }

  .builder-option-row,
  .builder-matching-row,
  .builder-ordering-row,
  .builder-cloze-row,
  .quiz-matching-row,
  .quiz-ordering-item,
  .quiz-cloze-extra,
  .quiz-bank-item {
    grid-template-columns: 1fr;
  }

  .quiz-bank-item-check {
    padding-top: 0;
  }

  .inline-form-row,
  .form-actions,
  .modal-header-actions {
    flex-wrap: wrap;
  }

  .checkbox-inline-group,
  .forum-header-actions {
    gap: 0.75rem;
  }

  .modal-content.modal-fullscreen {
    width: 100%;
    height: 100%;
    border-radius: 20px;
  }

  #ltiLaunchModal.modal-overlay.lti-launch-overlay {
    padding: 0;
  }

  #ltiLaunchModal .modal-content.modal-fullscreen.lti-launch-modal-shell {
    width: 100%;
    height: 100%;
    max-height: 100%;
    border-radius: 0;
  }

  .activity-viewer-overlay {
    padding: 0.75rem;
  }

  .activity-viewer-shell {
    width: 100%;
    height: 100%;
    border-radius: 20px;
  }

  .activity-viewer-header,
  .activity-viewer-footer {
    flex-direction: column;
    align-items: flex-start;
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .activity-viewer-body {
    padding: 0.85rem;
  }

  .activity-viewer-pdf-toolbar {
    flex-wrap: wrap;
    padding: 0.75rem 0.85rem;
  }

  .activity-viewer-pdf-canvas-wrap {
    padding: 0.75rem;
  }

  .activity-viewer-pdf-page {
    padding: 0.65rem;
    border-radius: 16px;
  }

  .activity-viewer-overlay--compact {
    align-items: stretch;
    justify-content: stretch;
    padding: 0;
    background: #111827;
    backdrop-filter: none;
    overscroll-behavior: contain;
  }

  .activity-viewer-overlay--compact .activity-viewer-shell {
    width: 100%;
    height: 100%;
    border: 0;
    border-radius: 0;
    background: #e5e7eb;
    box-shadow: none;
  }

  .activity-viewer-overlay--compact .activity-viewer-header {
    flex-direction: row;
    align-items: center;
    gap: 0.65rem;
    padding: calc(env(safe-area-inset-top, 0px) + 0.65rem) 0.75rem 0.65rem;
    background: rgba(255, 255, 255, 0.97);
  }

  .activity-viewer-overlay--compact .activity-viewer-title-block {
    min-width: 0;
  }

  .activity-viewer-overlay--compact .activity-viewer-title-block h3 {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 1rem;
  }

  .activity-viewer-overlay--compact .activity-viewer-title-block p {
    display: none;
  }

  .activity-viewer-overlay--compact .activity-viewer-close {
    flex: 0 0 auto;
    width: 38px;
    height: 38px;
    border-radius: 12px;
  }

  .activity-viewer-overlay--compact .activity-viewer-body {
    padding: 0;
    background: #e5e7eb;
  }

  .activity-viewer-overlay--compact .activity-viewer-footer {
    flex-direction: row;
    align-items: center;
    padding: 0.6rem 0.75rem calc(env(safe-area-inset-bottom, 0px) + 0.6rem);
    background: rgba(255, 255, 255, 0.96);
  }

  .activity-viewer-overlay--compact .activity-viewer-frame {
    min-height: 0;
    border-radius: 0;
  }

  .activity-viewer-overlay--compact .activity-viewer-frame-pdf {
    background: #e5e7eb;
  }

  .activity-viewer-overlay--compact .activity-viewer-pdf-toolbar {
    position: sticky;
    top: 0;
    z-index: 2;
    flex-wrap: nowrap;
    gap: 0.5rem;
    padding: 0.55rem 0.65rem;
    background: rgba(255, 255, 255, 0.96);
  }

  .activity-viewer-overlay--compact .activity-viewer-pdf-toolbar-group {
    gap: 0.35rem;
    min-width: 0;
  }

  .activity-viewer-overlay--compact .activity-viewer-pdf-btn {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    font-size: 1.2rem;
  }

  .activity-viewer-overlay--compact .activity-viewer-pdf-fit {
    height: 36px;
    border-radius: 10px;
    padding: 0 0.65rem;
    font-size: 0.78rem;
  }

  .activity-viewer-overlay--compact .activity-viewer-pdf-scale {
    min-width: 3.2rem;
    text-align: center;
    font-variant-numeric: tabular-nums;
  }

  .activity-viewer-overlay--compact .activity-viewer-pdf-pages {
    margin-left: auto;
    white-space: nowrap;
  }

  .activity-viewer-overlay--compact .activity-viewer-pdf-canvas-wrap {
    align-items: stretch;
    gap: 0.55rem;
    padding: 0.45rem 0;
    background: #e5e7eb;
  }

  .activity-viewer-overlay--compact .activity-viewer-pdf-page {
    width: 100%;
    padding: 0.35rem;
    border: 0;
    border-radius: 0;
    background: #fff;
    box-shadow: none;
  }

  .activity-viewer-overlay--compact .activity-viewer-pdf-page-label {
    margin: 0.2rem 0.35rem 0.45rem;
  }

  .activity-viewer-overlay--compact .activity-viewer-pdf-page canvas {
    max-width: 100%;
    margin: 0 auto;
    border-radius: 0;
  }

  .moodle-course-grid {
    grid-template-columns: 1fr;
  }

  .course-hero-top,
  .course-header-content {
    flex-direction: column;
  }

  .course-header-actions {
    width: 100%;
    flex-wrap: wrap;
  }

  .course-header-stat-grid {
    grid-template-columns: 1fr;
  }

  .course-nav-tabs {
    padding: 0.55rem;
  }

  .participants-directory-header {
    flex-direction: column;
  }

  .participants-directory-count {
    width: fit-content;
  }

  .participants-directory-grid {
    grid-template-columns: 1fr;
  }

  .section-header,
  .section-header-side {
    flex-direction: column;
    align-items: stretch;
  }

  .activity-item {
    grid-template-columns: 1fr;
    align-items: flex-start;
  }

  .activity-actions {
    flex-direction: row;
    justify-content: flex-end;
    align-self: stretch;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
  }

  .section-actions {
    width: 100%;
  }

  .quiz-header,
  .quiz-body {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .quiz-progress,
  .quiz-navigation {
    flex-direction: column;
    align-items: stretch;
  }

  .quiz-progress-bar {
    min-width: 0;
  }

  .question-option {
    align-items: flex-start;
  }

  .student-grades .grade-summary {
    grid-template-columns: 1fr;
  }

  .gradebook-shell-head {
    flex-direction: column;
    align-items: stretch;
  }

  .teacher-gradebook .gradebook-actions {
    width: 100%;
  }

  .activity-types-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .quiz-create-grid {
    grid-template-columns: 1fr;
  }

  .gradebook-table-wrapper {
    margin: 0 -1rem;
    border-radius: 0;
  }
}

/* ==================== 作業系統樣式 ==================== */
.assignment-detail {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 0.25rem 0 2rem;
}

.assignment-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at top right, rgba(74, 93, 35, 0.16), transparent 28%),
    linear-gradient(135deg, rgba(26, 58, 92, 0.98) 0%, rgba(45, 43, 107, 0.96) 52%, rgba(74, 93, 35, 0.92) 100%);
  border-radius: 28px;
  color: rgba(255, 255, 255, 0.96);
  padding: 1.6rem 1.75rem 1.75rem;
  box-shadow: 0 24px 56px rgba(26, 58, 92, 0.16);
}

.assignment-hero::after {
  content: "";
  position: absolute;
  inset: auto -40px -60px auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0) 70%);
}

.assignment-hero-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.4rem;
  position: relative;
  z-index: 1;
}

.assignment-hero-actions {
  display: inline-flex;
  align-items: flex-end;
  gap: 0.85rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.assignment-hero-actions .btn-sm.btn-danger {
  padding: 0.62rem 1rem;
  border-radius: 999px;
  background: rgba(255, 248, 244, 0.12);
  border-color: rgba(255, 223, 212, 0.26);
  color: rgba(255, 247, 239, 0.96);
  box-shadow: 0 14px 26px rgba(15, 23, 42, 0.16);
  backdrop-filter: blur(14px);
}

.assignment-hero-actions .btn-sm.btn-danger:hover {
  background: rgba(192, 87, 67, 0.28);
  border-color: rgba(255, 230, 221, 0.4);
  color: var(--white);
  box-shadow: 0 18px 30px rgba(15, 23, 42, 0.2);
}

.assignment-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.94);
  padding: 0.7rem 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.assignment-back-btn:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.28);
}

.assignment-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.34rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.84);
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.85rem;
}

.assignment-info {
  position: relative;
  z-index: 1;
}

.assignment-info h1 {
  font-size: clamp(1.7rem, 2vw, 2.2rem);
  margin: 0 0 0.55rem;
  line-height: 1.18;
  color: white;
}

.assignment-subtitle {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.6;
  max-width: 820px;
}

.assignment-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.9rem;
  margin-top: 1.35rem;
  position: relative;
  z-index: 1;
}

.assignment-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.32rem;
  min-width: 0;
  padding: 1rem 1.1rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
}

.assignment-meta-item .label {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
}

.assignment-meta-item .value {
  font-weight: 600;
  color: white;
  line-height: 1.45;
}

.assignment-status {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
  border: 1px solid transparent;
}

.assignment-status.not-submitted {
  background: rgba(254, 243, 199, 0.2);
  color: #FFF4D6;
  border-color: rgba(254, 243, 199, 0.28);
}

.assignment-status.submitted {
  background: rgba(209, 250, 229, 0.18);
  color: #DFFEF0;
  border-color: rgba(209, 250, 229, 0.24);
}

.assignment-status.late-submitted {
  background: rgba(254, 243, 199, 0.22);
  color: #FFF4D6;
  border-color: rgba(254, 243, 199, 0.28);
}

.assignment-status.graded {
  background: rgba(219, 234, 254, 0.18);
  color: #E6F0FF;
  border-color: rgba(219, 234, 254, 0.24);
}

.assignment-panel,
.submission-area,
.grading-area {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(247, 243, 235, 0.92) 100%);
  border-radius: 24px;
  padding: 1.4rem 1.5rem 1.5rem;
  border: 1px solid rgba(212, 197, 169, 0.24);
  box-shadow: var(--shadow-card);
}

.assignment-panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.assignment-panel-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.assignment-panel-copy {
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
  min-width: 0;
}

.assignment-panel-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.assignment-panel-title {
  margin: 0;
  font-size: 1.08rem;
  color: var(--charcoal);
}

.assignment-panel-note {
  margin: 0;
  color: var(--gray-500);
  line-height: 1.6;
  font-size: 0.92rem;
}

.assignment-content,
.assignment-body {
  line-height: 1.72;
  color: var(--gray-600);
}

.assignment-body {
  font-size: 0.98rem;
}

.assignment-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.assignment-form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.assignment-form-field {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.assignment-form-field label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--charcoal);
}

.assignment-form-field textarea {
  width: 100%;
  min-height: 220px;
  padding: 1rem 1rem 1.05rem;
  border: 1px solid rgba(26, 58, 92, 0.12);
  border-radius: 16px;
  resize: vertical;
  background: rgba(255,255,255,0.94);
  color: var(--charcoal);
  font: inherit;
  line-height: 1.65;
}

.assignment-form-field textarea:focus-visible {
  outline: 2px solid rgba(74, 93, 35, 0.2);
  outline-offset: 1px;
  border-color: rgba(74, 93, 35, 0.45);
  box-shadow: 0 0 0 4px rgba(168, 184, 154, 0.12);
}

.assignment-submit-time {
  margin-top: 1rem;
  color: var(--gray-500);
  font-size: 0.88rem;
}

.assignment-deadline-note {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 1rem;
  padding: 0.95rem 1rem;
  border-radius: 16px;
  border: 1px solid rgba(212, 197, 169, 0.22);
  background: rgba(255,255,255,0.84);
}

.assignment-deadline-note strong {
  font-size: 0.92rem;
  color: var(--charcoal);
}

.assignment-deadline-note span {
  color: var(--gray-600);
  line-height: 1.55;
  font-size: 0.88rem;
}

.assignment-deadline-note.is-late {
  border-color: rgba(193, 122, 94, 0.18);
  background: rgba(193, 122, 94, 0.08);
}

.assignment-deadline-note.is-submitted {
  border-color: rgba(74, 124, 89, 0.18);
  background: rgba(74, 124, 89, 0.08);
}

.assignment-submission-summary {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  margin-bottom: 1.15rem;
}

.submitted-content {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.text-content {
  padding: 1rem 1.1rem;
  border-radius: 16px;
  background: rgba(255,255,255,0.8);
  border: 1px solid rgba(212, 197, 169, 0.2);
}

.file-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.assignment-file-group {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.assignment-file-group-title {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--gray-500);
}

.file-item {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: rgba(74, 93, 35, 0.08);
  color: var(--olive-deep);
  font-size: 0.82rem;
  font-weight: 600;
}

.assignment-feedback-card {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border-radius: 16px;
  background: rgba(74, 93, 35, 0.08);
  border: 1px solid rgba(74, 93, 35, 0.14);
}

.assignment-feedback-card h3,
.assignment-feedback-card h4 {
  margin: 0 0 0.45rem;
  color: var(--olive-deep);
  font-size: 0.92rem;
}

.assignment-feedback-card p {
  margin: 0;
  color: var(--charcoal);
  line-height: 1.65;
}

.assignment-feedback-card .feedback-markdown {
  color: var(--charcoal);
  line-height: 1.65;
}

.assignment-feedback-card .feedback-markdown p {
  margin: 0 0 0.8rem;
}

.assignment-feedback-card .feedback-markdown p:last-child,
.assignment-feedback-card .feedback-markdown ul:last-child,
.assignment-feedback-card .feedback-markdown ol:last-child {
  margin-bottom: 0;
}

.assignment-feedback-card .feedback-markdown ul,
.assignment-feedback-card .feedback-markdown ol {
  margin: 0.35rem 0 0.85rem 1.25rem;
  padding: 0;
}

.assignment-feedback-card .feedback-markdown li {
  margin: 0.25rem 0;
}

.assignment-feedback-card .feedback-markdown strong {
  color: var(--charcoal);
  font-weight: 800;
}

.assignment-feedback-card .feedback-markdown code {
  padding: 0.08rem 0.32rem;
  border-radius: 6px;
  background: rgba(26, 58, 92, 0.08);
  font-size: 0.92em;
}

.assignment-file-row {
  justify-content: space-between;
}

.assignment-file-copy {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
  min-width: 0;
}

.assignment-file-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.assignment-file-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.42rem 0.76rem;
  border-radius: 999px;
  border: 1px solid rgba(26, 58, 92, 0.12);
  background: rgba(255,255,255,0.94);
  color: var(--olive-deep);
  text-decoration: none;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
}

.assignment-file-action.is-danger {
  color: var(--terracotta);
}

.assignment-file-meta {
  font-size: 0.78rem;
  color: var(--gray-500);
}

.assignment-submission-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.assignment-submission-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.1rem;
  background: rgba(255,255,255,0.86);
  border-radius: 18px;
  border: 1px solid rgba(212, 197, 169, 0.22);
}

.assignment-submission-student {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.assignment-submission-avatar {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(74, 93, 35, 0.92) 0%, rgba(26, 58, 92, 0.94) 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.assignment-submission-name {
  display: block;
  font-weight: 600;
  color: var(--charcoal);
}

.assignment-submission-time {
  display: block;
  margin-top: 0.18rem;
  font-size: 0.82rem;
  color: var(--gray-500);
}

.assignment-submission-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.22rem 0.6rem;
  border-radius: 999px;
  margin-top: 0.4rem;
  font-size: 0.74rem;
  font-weight: 700;
}

.assignment-submission-tag.is-late {
  background: rgba(193, 122, 94, 0.12);
  color: var(--terracotta);
}

.assignment-submission-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.assignment-submission-actions input {
  width: 88px;
  padding: 0.62rem 0.7rem;
  border: 1px solid rgba(26, 58, 92, 0.12);
  border-radius: 12px;
  text-align: center;
  background: white;
  color: var(--charcoal);
}

.assignment-empty-state {
  text-align: center;
  padding: 1.4rem 1rem;
  border-radius: 18px;
  background: rgba(255,255,255,0.72);
  border: 1px dashed rgba(212, 197, 169, 0.42);
  color: var(--gray-500);
}

.assignment-empty-state svg {
  width: 40px;
  height: 40px;
  margin-bottom: 0.7rem;
  color: var(--olive);
}

.assignment-empty-state-title {
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: 0.35rem;
}

.file-upload-area {
  display: block;
  width: 100%;
  border: 1px dashed rgba(74, 93, 35, 0.36);
  border-radius: 18px;
  padding: 1.5rem 1.25rem;
  background: transparent;
  appearance: none;
  text-align: center;
  color: inherit;
  font: inherit;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.file-upload-area:hover {
  border-color: var(--olive);
  background: rgba(74, 93, 35, 0.07);
  transform: translateY(-1px);
}

.file-upload-area:focus-visible {
  outline: 2px solid rgba(74, 93, 35, 0.24);
  outline-offset: 3px;
}

.file-upload-area svg {
  margin-bottom: 0.6rem;
  color: var(--olive);
}

.file-upload-copy {
  display: block;
  color: var(--gray-500);
  font-size: 0.9rem;
  margin: 0;
}

/* ==================== 測驗系統樣式 ==================== */
.quiz-container {
  max-width: 800px;
  margin: 0 auto;
}

.quiz-header {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at top right, rgba(255,255,255,0.24), transparent 26%),
    linear-gradient(135deg, rgba(26, 58, 92, 0.98) 0%, rgba(45, 43, 107, 0.96) 54%, rgba(86, 121, 96, 0.92) 100%);
  color: var(--cream);
  padding: 1.4rem 1.5rem 1.25rem;
  border-radius: 24px 24px 0 0;
  box-shadow: 0 20px 36px rgba(15, 23, 42, 0.14);
}

.quiz-attempt-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem;
  margin-bottom: 0.9rem;
}

.quiz-exit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.38rem;
  min-height: 40px;
  padding: 0.5rem 0.78rem;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 999px;
  background: rgba(255,255,255,0.12);
  color: var(--cream);
  font-weight: 750;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.quiz-exit-btn:hover:not(:disabled) {
  background: rgba(255,255,255,0.18);
  transform: translateY(-1px);
}

.quiz-exit-btn:disabled {
  cursor: wait;
  opacity: 0.72;
}

.quiz-exit-note {
  flex: 1;
  min-width: 0;
  color: rgba(255, 251, 245, 0.76);
  font-size: 0.8rem;
  line-height: 1.45;
  text-align: right;
}

.quiz-header h2 {
  margin: 0.25rem 0 0;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

.quiz-kicker {
  margin: 0;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255, 251, 245, 0.7);
}

.quiz-progress {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.1rem;
}

.quiz-progress-copy {
  display: flex;
  flex-direction: column;
  gap: 0.32rem;
}

.quiz-progress-label {
  font-size: 0.82rem;
  color: rgba(255, 251, 245, 0.82);
}

.quiz-progress-value {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(255, 251, 245, 0.68);
}

.quiz-progress-bar {
  flex: 1;
  min-width: 180px;
  height: 10px;
  background: rgba(255,255,255,0.18);
  border-radius: 999px;
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, rgba(255,255,255,0.96), rgba(246, 227, 198, 0.9));
  border-radius: 999px;
  transition: width var(--transition-base);
}

.quiz-timer {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.05rem;
  font-weight: 700;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.14);
  border: 1px solid rgba(255,255,255,0.16);
}

.quiz-autosave-status {
  min-height: 1.15rem;
  margin-top: 0.65rem;
  font-size: 0.78rem;
  font-weight: 650;
  color: rgba(255, 251, 245, 0.78);
}

.quiz-autosave-status[data-state="saved"] {
  color: rgba(220, 252, 231, 0.92);
}

.quiz-autosave-status[data-state="saving"],
.quiz-autosave-status[data-state="local"] {
  color: rgba(254, 240, 138, 0.95);
}

.quiz-autosave-status[data-state="error"] {
  color: rgba(254, 202, 202, 0.95);
}

.quiz-resume-note {
  display: grid;
  gap: 0.25rem;
  margin: 1rem 0;
  padding: 0.9rem 1rem;
  border: 1px solid rgba(87, 109, 72, 0.2);
  border-radius: 14px;
  background: rgba(244, 249, 242, 0.86);
  color: var(--charcoal);
}

.quiz-resume-note strong {
  font-size: 0.95rem;
}

.quiz-resume-note span {
  color: var(--gray-600);
  line-height: 1.55;
}

.quiz-resume-note.is-muted {
  border-color: rgba(26, 58, 92, 0.1);
  background: rgba(255,255,255,0.78);
}

.quiz-body {
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.98));
  padding: 1.5rem;
  border-radius: 0 0 24px 24px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-top: none;
  box-shadow: 0 20px 36px rgba(15, 23, 42, 0.08);
}

.quiz-question-panel {
  background: rgba(255,255,255,0.86);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 22px;
  padding: 1.4rem;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.65);
}

.question-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 0.6rem;
}

.quiz-question-part-header {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.9rem;
  padding: 0.72rem 0.85rem;
  border-radius: 14px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: rgba(26, 58, 92, 0.045);
  color: var(--charcoal);
}

.quiz-question-part-header strong {
  min-width: 0;
  font-size: 0.92rem;
  line-height: 1.35;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.quiz-question-part-header span {
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--gray-500);
  white-space: nowrap;
}

.quiz-question-part-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  background: rgba(74, 124, 89, 0.12);
  color: var(--olive-deep) !important;
}

.question-content h3 {
  font-size: 1.24rem;
  margin-bottom: 1.5rem;
  line-height: 1.6;
  color: var(--charcoal);
}

.question-options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.question-option {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1rem 1.05rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.98));
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-radius: 16px;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.question-option:hover {
  border-color: rgba(87, 109, 72, 0.26);
  transform: translateY(-1px);
  box-shadow: 0 14px 24px rgba(15, 23, 42, 0.06);
}

.question-option.selected {
  border-color: rgba(87, 109, 72, 0.34);
  background: linear-gradient(180deg, rgba(244, 249, 242, 0.98), rgba(255,255,255,0.98));
  box-shadow: 0 14px 24px rgba(87, 109, 72, 0.12);
}

.question-option:has(input:checked) {
  border-color: rgba(87, 109, 72, 0.34);
  background: linear-gradient(180deg, rgba(244, 249, 242, 0.98), rgba(255,255,255,0.98));
  box-shadow: 0 14px 24px rgba(87, 109, 72, 0.12);
}

.question-option input {
  width: 20px;
  height: 20px;
  accent-color: var(--olive);
  flex-shrink: 0;
}

.question-option-text {
  flex: 1;
  color: var(--charcoal);
  line-height: 1.6;
}

.question-content textarea {
  width: 100%;
  min-height: 150px;
  padding: 1rem 1.05rem;
  border-radius: 16px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: rgba(255,255,255,0.94);
  font: inherit;
  line-height: 1.65;
  color: var(--charcoal);
  resize: vertical;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.7);
}

.question-content textarea:focus {
  outline: none;
  border-color: rgba(87, 109, 72, 0.3);
  box-shadow: 0 0 0 4px rgba(168, 184, 154, 0.16);
}

.question-content input[type="number"],
.quiz-matching-select,
.quiz-cloze-input {
  width: 100%;
  min-height: 46px;
  padding: 0.75rem 0.9rem;
  border-radius: 12px;
  border: 1px solid rgba(26, 58, 92, 0.1);
  background: rgba(255,255,255,0.96);
  color: var(--charcoal);
  font: inherit;
}

.question-content input[type="number"]:focus,
.quiz-matching-select:focus,
.quiz-cloze-input:focus {
  outline: none;
  border-color: rgba(87, 109, 72, 0.3);
  box-shadow: 0 0 0 4px rgba(168, 184, 154, 0.16);
}

.quiz-matching-list,
.quiz-ordering-list,
.quiz-cloze-extra-list {
  display: grid;
  gap: 0.75rem;
}

.quiz-matching-row,
.quiz-ordering-item,
.quiz-cloze-extra {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(12rem, 0.9fr);
  gap: 0.75rem;
  align-items: center;
  padding: 0.9rem;
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-radius: 14px;
  background: rgba(255,255,255,0.82);
}

.quiz-matching-prompt,
.quiz-ordering-text {
  color: var(--charcoal);
  line-height: 1.55;
}

.quiz-ordering-item {
  grid-template-columns: auto minmax(0, 1fr) auto;
}

.quiz-ordering-rank {
  width: 2rem;
  height: 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: rgba(87, 109, 72, 0.12);
  color: var(--olive);
  font-weight: 700;
}

.quiz-ordering-actions {
  display: flex;
  gap: 0.35rem;
}

.quiz-cloze-passage {
  padding: 1rem;
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-radius: 14px;
  background: rgba(255,255,255,0.86);
  color: var(--charcoal);
  line-height: 2.2;
}

.quiz-cloze-input {
  display: inline-block;
  width: min(12rem, 100%);
  min-height: 40px;
  margin: 0 0.25rem;
  vertical-align: baseline;
}

.quiz-cloze-extra-list {
  margin-top: 0.8rem;
}

.quiz-results-order-list {
  margin: 0.35rem 0 0;
  padding-left: 1.25rem;
}

.quiz-navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1.35rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
}

.quiz-question-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 0.95rem;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
}

.quiz-question-nav-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-top: 1rem;
  color: var(--gray-500);
  font-size: 0.78rem;
  font-weight: 700;
}

.quiz-nav-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 28px;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.82);
  border: 1px solid rgba(15, 23, 42, 0.08);
}

.quiz-nav-status-pill span {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 999px;
  background: var(--olive);
}

.quiz-nav-status-pill.unanswered span {
  background: #dc2626;
}

.question-nav-btn {
  width: 40px;
  height: 40px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: rgba(255,255,255,0.92);
  border-radius: 12px;
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

/* Quiz results detail page */
.quiz-results {
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.98));
  border-radius: 24px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  overflow: hidden;
  box-shadow: 0 20px 36px rgba(15, 23, 42, 0.08);
}

.quiz-results-header {
  background: linear-gradient(135deg, rgba(26, 58, 92, 0.98) 0%, rgba(45, 43, 107, 0.96) 54%, rgba(86, 121, 96, 0.9) 100%);
  color: var(--cream);
  padding: 2rem 1.5rem;
  text-align: center;
}

.quiz-results-header h2 {
  font-size: 1.4rem;
  margin-bottom: 1.2rem;
}

.quiz-results-score-card {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  padding: 1.2rem 2rem;
  border-radius: 20px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.16);
}

.quiz-results-score-card.passed {
  background: rgba(87, 109, 72, 0.22);
  border-color: rgba(87, 109, 72, 0.3);
}

.quiz-results-score-card.not-passed {
  background: rgba(180, 83, 9, 0.18);
  border-color: rgba(180, 83, 9, 0.25);
}

.quiz-results-score-value {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.quiz-results-score-pct {
  font-size: 1.1rem;
  font-weight: 700;
  opacity: 0.85;
}

.quiz-results-score-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  opacity: 0.7;
}

.quiz-results-questions {
  padding: 1.5rem;
}

.quiz-results-questions h3 {
  font-size: 1.1rem;
  color: var(--charcoal);
  margin-bottom: 1rem;
}

.quiz-results-question {
  background: rgba(255,255,255,0.86);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 16px;
  padding: 1.1rem;
  margin-bottom: 0.75rem;
}

.quiz-results-question.is-correct {
  border-left: 4px solid var(--olive, #576d48);
}

.quiz-results-question.is-wrong {
  border-left: 4px solid var(--rust, #b45309);
}

.quiz-results-question-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

.quiz-results-question-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(26, 58, 92, 0.06);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--charcoal);
}

.quiz-results-question-status {
  display: inline-flex;
  align-items: center;
}

.quiz-results-question-text {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--charcoal);
  margin-bottom: 0.7rem;
}

.quiz-results-answer {
  font-size: 0.92rem;
  line-height: 1.5;
  padding: 0.5rem 0.75rem;
  border-radius: 10px;
  margin-bottom: 0.35rem;
}

.quiz-results-student-answer.correct {
  background: rgba(87, 109, 72, 0.1);
  color: var(--olive, #576d48);
}

.quiz-results-student-answer.wrong {
  background: rgba(180, 83, 9, 0.08);
  color: var(--rust, #b45309);
}

.quiz-results-correct-answer {
  background: rgba(87, 109, 72, 0.06);
  color: var(--olive, #576d48);
}

.quiz-results-footer {
  padding: 1.2rem 1.5rem;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
  text-align: center;
}

@media (max-width: 768px) {
  .quiz-results {
    border-radius: 18px;
  }

  .quiz-results-header {
    padding: 1.2rem 1rem;
  }

  .quiz-results-header h2 {
    font-size: 1.16rem;
    line-height: 1.35;
    word-break: break-word;
    overflow-wrap: anywhere;
  }

  .quiz-results-score-card {
    width: 100%;
    padding: 1rem;
    border-radius: 16px;
  }

  .quiz-results-score-value {
    font-size: 1.55rem;
  }

  .quiz-results-questions {
    padding: 1rem 0.85rem;
  }

  .quiz-results-question {
    padding: 0.9rem;
    border-radius: 14px;
  }

  .quiz-results-question-header {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .quiz-results-question-text,
  .quiz-results-answer {
    word-break: break-word;
    overflow-wrap: anywhere;
  }

  .quiz-results-footer {
    padding: 1rem;
  }

  .quiz-results-footer .btn-secondary,
  .quiz-results-footer .btn-primary {
    width: 100%;
    min-height: 48px;
  }
}

.quiz-report-shell {
  gap: 1.25rem;
  width: min(100%, 1540px);
  max-width: calc(100vw - 3rem);
}

.management-detail-page.quiz-report-shell {
  width: 100%;
  max-width: none;
}

.quiz-report-hero {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(380px, 0.85fr);
  gap: 1.2rem;
  padding: 1.4rem;
  border-radius: 28px;
  background:
    radial-gradient(circle at top right, rgba(255,255,255,0.22), transparent 28%),
    linear-gradient(135deg, rgba(26, 58, 92, 0.98) 0%, rgba(45, 43, 107, 0.96) 54%, rgba(86, 121, 96, 0.9) 100%);
  color: var(--cream);
  box-shadow: 0 24px 42px rgba(15, 23, 42, 0.14);
}

.quiz-report-kicker {
  display: inline-flex;
  margin-bottom: 0.45rem;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255, 251, 245, 0.72);
}

.quiz-report-title {
  margin: 0;
  font-size: 1.6rem;
  letter-spacing: -0.03em;
  color: var(--cream);
}

.quiz-report-desc {
  margin: 0.7rem 0 0;
  line-height: 1.7;
  color: rgba(255, 251, 245, 0.84);
}

.quiz-report-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.quiz-report-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.72rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.14);
  border: 1px solid rgba(255,255,255,0.14);
  font-size: 0.78rem;
  font-weight: 700;
}

.quiz-report-scoreboard {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.quiz-report-scorecard {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 132px;
  padding: 1rem;
  border-radius: 22px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(6px);
}

.quiz-report-scorecard.tone-blue {
  background: rgba(67, 113, 186, 0.14);
}

.quiz-report-scorecard.tone-success {
  background: rgba(74, 124, 89, 0.16);
}

.quiz-report-scorecard.tone-terracotta {
  background: rgba(192, 101, 77, 0.16);
}

.quiz-report-scorecard-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255, 251, 245, 0.72);
}

.quiz-report-scorecard-value {
  font-size: 2rem;
  line-height: 1;
  letter-spacing: -0.03em;
}

.quiz-report-scorecard-note {
  font-size: 0.82rem;
  line-height: 1.55;
  color: rgba(255, 251, 245, 0.74);
}

.quiz-report-insight-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(420px, 1fr));
  gap: 1rem;
}

.quiz-report-panel {
  padding: 1.2rem;
  border-radius: 24px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.98));
  box-shadow: 0 18px 32px rgba(15, 23, 42, 0.07);
}

.quiz-report-panel-head {
  margin-bottom: 0.95rem;
}

.quiz-report-panel-kicker {
  display: inline-flex;
  margin-bottom: 0.25rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-500);
}

.quiz-report-panel-head h3 {
  margin: 0;
  color: var(--charcoal);
}

.quiz-section-analytics {
  display: grid;
  grid-template-columns: minmax(230px, 0.35fr) minmax(0, 0.65fr);
  gap: 1rem;
  align-items: start;
}

.quiz-section-analytics.is-student {
  grid-template-columns: minmax(320px, 0.42fr) minmax(0, 0.58fr);
}

.quiz-section-summary-stack {
  display: grid;
  gap: 1rem;
}

.quiz-radar-card,
.quiz-section-rate-card,
.quiz-section-card {
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.06);
}

.quiz-radar-card {
  padding: 1rem;
  text-align: center;
}

.quiz-radar-card h4 {
  margin: 0 0 0.75rem;
  color: var(--charcoal);
}

.quiz-section-rate-card {
  padding: 1rem;
}

.quiz-section-rate-card h4 {
  margin: 0 0 0.85rem;
  color: var(--charcoal);
}

.quiz-section-rate-bars {
  display: grid;
  gap: 0.72rem;
}

.quiz-section-rate-row {
  display: grid;
  grid-template-columns: minmax(7.5rem, 0.42fr) minmax(7rem, 1fr) auto;
  gap: 0.7rem;
  align-items: center;
}

.quiz-section-rate-copy {
  min-width: 0;
  display: grid;
  gap: 0.16rem;
}

.quiz-section-rate-copy span {
  color: var(--charcoal);
  font-size: 0.86rem;
  font-weight: 750;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.quiz-section-rate-copy small {
  color: var(--gray-500);
  font-size: 0.72rem;
  line-height: 1.3;
}

.quiz-section-rate-track {
  height: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(26, 58, 92, 0.09);
}

.quiz-section-rate-fill {
  width: var(--progress, 0%);
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--olive, #2D2B6B), var(--gold, #D6B85E));
}

.quiz-section-rate-row strong {
  min-width: 3.1rem;
  color: var(--charcoal);
  font-size: 0.86rem;
  text-align: right;
}

.quiz-radar-chart {
  width: min(100%, 280px);
  height: auto;
}

.quiz-radar-ring {
  fill: none;
  stroke: rgba(26, 58, 92, 0.12);
  stroke-width: 1;
}

.quiz-radar-axis {
  stroke: rgba(26, 58, 92, 0.12);
  stroke-width: 1;
}

.quiz-radar-value {
  fill: rgba(74, 124, 89, 0.24);
  stroke: var(--olive);
  stroke-width: 2.5;
}

.quiz-radar-label {
  fill: var(--gray-700);
  font-size: 0.68rem;
  font-weight: 700;
}

.quiz-radar-legend {
  width: 100%;
  max-width: 360px;
  margin: 0.75rem auto 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.45rem 0.75rem;
  text-align: left;
}

.quiz-radar-legend li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 0.45rem;
  min-width: 0;
  color: var(--gray-700);
  font-size: 0.78rem;
  line-height: 1.32;
}

.quiz-radar-legend-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.4rem;
  padding: 0.12rem 0.38rem;
  border-radius: 999px;
  background: rgba(45, 43, 107, 0.08);
  color: var(--blue-dark);
  font-weight: 800;
  white-space: nowrap;
}

.quiz-radar-legend-label {
  min-width: 0;
  overflow-wrap: anywhere;
}

.quiz-section-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.quiz-section-card {
  padding: 1rem;
}

.quiz-section-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.8rem;
}

.quiz-section-card h4 {
  margin: 0;
  font-size: 1.55rem;
  color: var(--charcoal);
}

.quiz-section-card h5 {
  margin: 0.9rem 0 0.5rem;
  color: var(--gray-700);
}

.quiz-section-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}

.quiz-section-metrics span {
  display: inline-flex;
  gap: 0.35rem;
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
  background: rgba(26, 58, 92, 0.06);
  color: var(--gray-700);
  font-size: 0.8rem;
}

.quiz-question-detail-disclosure {
  margin-top: 0.8rem;
  border-top: 1px solid rgba(26, 58, 92, 0.08);
  padding-top: 0.65rem;
}

.quiz-question-detail-disclosure summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  min-height: 40px;
  padding: 0.48rem 0.62rem;
  border-radius: 12px;
  background: rgba(26, 58, 92, 0.05);
  color: var(--charcoal);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 750;
  list-style: none;
  touch-action: manipulation;
}

.quiz-question-detail-disclosure summary::-webkit-details-marker {
  display: none;
}

.quiz-question-detail-disclosure summary::after {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 999px;
  background: rgba(45, 43, 107, 0.1);
  color: var(--blue-dark);
  font-weight: 800;
}

.quiz-question-detail-disclosure[open] summary::after {
  content: "-";
}

.quiz-question-detail-disclosure summary:focus-visible {
  outline: 3px solid rgba(45, 43, 107, 0.24);
  outline-offset: 2px;
}

.quiz-question-detail-disclosure summary span,
.quiz-question-detail-disclosure summary small {
  min-width: 0;
}

.quiz-question-detail-disclosure summary span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.quiz-question-detail-disclosure summary small {
  flex: 0 0 auto;
  color: var(--gray-500);
  font-size: 0.72rem;
  font-weight: 700;
}

.quiz-question-detail-body {
  padding-top: 0.65rem;
}

.quiz-section-bars {
  display: grid;
  gap: 0.5rem;
}

.quiz-section-bar-row {
  display: grid;
  grid-template-columns: minmax(72px, 0.36fr) minmax(90px, 1fr) minmax(38px, auto);
  gap: 0.55rem;
  align-items: center;
}

.quiz-section-bar-label,
.quiz-section-bar-value {
  font-size: 0.78rem;
  color: var(--gray-600);
}

.quiz-section-bar-value {
  text-align: right;
  font-weight: 700;
  color: var(--charcoal);
}

.quiz-section-bar-track {
  height: 10px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(26, 58, 92, 0.09);
}

.quiz-section-bar-fill {
  height: 100%;
  width: var(--progress, 0%);
  border-radius: inherit;
  background: linear-gradient(90deg, var(--blue, #2B6CB0), var(--olive, #2D2B6B));
}

.quiz-section-bar-fill.is-correct {
  background: linear-gradient(90deg, var(--olive, #2D2B6B), var(--gold, #D6B85E));
}

.quiz-results-section-shell {
  margin: 1rem 0;
}

.quiz-export-actions {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 0.5rem;
}

@media (max-width: 900px) {
  .quiz-section-analytics,
  .quiz-section-analytics.is-student {
    grid-template-columns: 1fr;
    overflow-x: hidden;
  }
  .quiz-section-summary-stack,
  .quiz-section-grid,
  .quiz-radar-card,
  .quiz-section-rate-card,
  .quiz-section-card {
    min-width: 0;
  }
  .quiz-section-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 560px) {
  .quiz-export-actions {
    width: 100%;
    justify-content: stretch;
  }

  .quiz-export-actions .btn-sm {
    flex: 1 1 0;
    min-width: 0;
  }

  .quiz-radar-chart {
    width: min(100%, 250px);
  }

  .quiz-radar-label {
    font-size: 0.78rem;
  }

  .quiz-radar-legend {
    grid-template-columns: 1fr;
    gap: 0.38rem;
    margin-top: 0.5rem;
  }

  .quiz-radar-legend li {
    font-size: 0.82rem;
  }

  .quiz-section-rate-row {
    grid-template-columns: 1fr auto;
    gap: 0.45rem 0.65rem;
  }
  .quiz-section-rate-track {
    grid-column: 1 / -1;
    grid-row: 2;
  }
  .quiz-section-rate-row strong {
    grid-column: 2;
    grid-row: 1;
  }
  .quiz-section-bar-row {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.4rem 0.6rem;
  }
  .quiz-section-bar-label {
    grid-column: 1;
    grid-row: 1;
    min-width: 0;
    overflow-wrap: anywhere;
  }
  .quiz-section-bar-value {
    grid-column: 2;
    grid-row: 1;
    min-width: 2.75rem;
  }
  .quiz-section-bar-track {
    grid-column: 1 / -1;
    grid-row: 2;
  }
}

.question-nav-btn.current {
  background: linear-gradient(180deg, #ffffff 0%, #edf4ff 100%) !important;
  color: #1f5fe8 !important;
  border-color: rgba(31, 95, 232, 0.48) !important;
  box-shadow:
    inset 0 0 0 2px rgba(31, 95, 232, 0.16),
    0 10px 18px rgba(31, 95, 232, 0.18);
  transform: translateY(-1px);
}

.question-nav-btn.unanswered {
  background: rgba(254, 242, 242, 0.96);
  color: #b42318;
  border-color: rgba(220, 38, 38, 0.42);
}

.question-nav-btn.unanswered.current {
  background: linear-gradient(180deg, #fff7f7 0%, #fee2e2 100%) !important;
  color: #b42318 !important;
  border-color: rgba(220, 38, 38, 0.62) !important;
  box-shadow:
    inset 0 0 0 2px rgba(220, 38, 38, 0.16),
    0 10px 18px rgba(220, 38, 38, 0.16);
}

.question-nav-btn.answered:not(.current) {
  background: rgba(87, 109, 72, 0.1);
  color: var(--olive-deep);
}

.question-nav-btn.locked,
.question-nav-btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

/* ==================== 討論區樣式 ==================== */
.forum-container {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
}

.forum-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.forum-header h2 {
  font-size: 1.25rem;
}

.discussion-list {
  divide-y divide-gray-100;
}

.discussion-item {
  padding: 1.25rem 1.5rem;
  display: flex;
  gap: 1rem;
  cursor: pointer;
  width: 100%;
  appearance: none;
  text-align: left;
  color: inherit;
  font: inherit;
  transition: background 0.2s;
}

.discussion-item:hover {
  background: var(--gray-50);
}

.discussion-item:focus-visible {
  outline: 3px solid rgba(74, 93, 35, 0.22);
  outline-offset: -3px;
}

.discussion-item.pinned {
  background: #fffbeb;
}

.discussion-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--olive);
  color: var(--cream);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.discussion-content {
  flex: 1;
  min-width: 0;
}

.discussion-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.discussion-title .pin-badge {
  background: #fbbf24;
  color: #78350f;
  padding: 0.1rem 0.5rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
}

.discussion-excerpt {
  font-size: 0.9rem;
  color: var(--gray-500);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 0.5rem;
}

.discussion-meta {
  font-size: 0.8rem;
  color: var(--gray-400);
  display: flex;
  gap: 1rem;
}

.discussion-stats {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
  flex-shrink: 0;
}

.discussion-stats .reply-count {
  background: var(--gray-100);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--gray-600);
}

.discussion-stats .last-reply {
  font-size: 0.75rem;
  color: var(--gray-400);
}

/* 討論詳情頁 */
.discussion-detail {
  padding: 1.5rem;
}

.discussion-post {
  display: flex;
  gap: 1rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--gray-100);
}

.discussion-post:first-child {
  padding-top: 0;
}

.post-content {
  flex: 1;
}

.post-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.post-author {
  font-weight: 600;
}

.post-date {
  font-size: 0.8rem;
  color: var(--gray-400);
}

.post-body {
  line-height: 1.7;
  color: var(--gray-700);
}

.post-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.post-action-btn {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.5rem;
  background: none;
  border: none;
  color: var(--gray-500);
  font-size: 0.85rem;
  cursor: pointer;
  transition: color 0.2s;
}

.post-action-btn:hover {
  color: var(--olive);
}

.post-action-btn.liked {
  color: var(--terracotta);
}

.reply-form {
  padding: 1.5rem;
  background: var(--gray-50);
  border-radius: 8px;
  margin-top: 1rem;
}

.reply-form textarea {
  width: 100%;
  min-height: 100px;
  padding: 1rem;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  resize: vertical;
  margin-bottom: 1rem;
}

/* ==================== 行事曆樣式 ==================== */
#moodleCalendarView .calendar-shell,
#moodleCalendarView .calendar-container {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--gray-100);
}

#moodleCalendarView .calendar-toolbar-shell,
#moodleCalendarView .calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--gray-100);
  background: var(--white);
}

#moodleCalendarView .calendar-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

#moodleCalendarView .calendar-nav h2 {
  font-size: 1.25rem;
  min-width: 180px;
  text-align: center;
}

#moodleCalendarView .calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0;
  width: 100%;
  min-width: 0;
  text-align: initial;
  grid-auto-rows: minmax(122px, auto);
  align-items: stretch;
}

#moodleCalendarView .calendar-grid > * {
  min-width: 0;
}

#moodleCalendarView .calendar-weekday {
  padding: 1rem;
  text-align: center;
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--gray-500);
  text-transform: uppercase;
  background: var(--gray-50);
}

#moodleCalendarView .calendar-day {
  display: block;
  min-height: 100px;
  min-width: 0;
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--gray-100);
  position: relative;
  background: transparent;
  appearance: none;
  aspect-ratio: auto;
  text-align: left;
  color: inherit;
  font: inherit;
  box-sizing: border-box;
  overflow: hidden;
}

#moodleCalendarView .calendar-day.other-month {
  background: var(--gray-50);
  color: var(--gray-400);
}

#moodleCalendarView button.calendar-day {
  cursor: pointer;
}

#moodleCalendarView button.calendar-day:focus-visible {
  outline: 2px solid rgba(74, 93, 35, 0.22);
  outline-offset: 2px;
}

#moodleCalendarView .calendar-day.today {
  background: var(--olive)10;
}

#moodleCalendarView .calendar-day .day-number {
  display: inline-flex;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

#moodleCalendarView .calendar-day.today .day-number {
  width: 28px;
  height: 28px;
  background: var(--olive);
  color: var(--cream);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

#moodleCalendarView .calendar-event {
  display: block;
  font-size: 0.75rem;
  max-width: 100%;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
}

#moodleCalendarView .calendar-event.assignment {
  background: var(--terracotta)20;
  color: var(--terracotta);
}

#moodleCalendarView .calendar-event.quiz {
  background: #8b5cf620;
  color: #8b5cf6;
}

#moodleCalendarView .calendar-event.course {
  background: var(--olive)20;
  color: var(--olive);
}

#moodleCalendarView .calendar-event.personal {
  background: #0ea5e920;
  color: #0ea5e9;
}

#moodleCalendarView .calendar-day-modal-shell {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

#moodleCalendarView .calendar-day-modal-hero {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.1rem;
  border-radius: 22px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background:
    radial-gradient(circle at top right, rgba(122, 148, 115, 0.12), transparent 38%),
    linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(248,245,239,0.92) 100%);
}

#moodleCalendarView .calendar-day-modal-date-card {
  min-width: 108px;
  padding: 1rem 0.95rem;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--olive-deep) 0%, var(--olive) 100%);
  color: var(--cream);
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  box-shadow: 0 14px 26px rgba(26, 58, 92, 0.18);
}

#moodleCalendarView .calendar-day-modal-date-top {
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.78;
}

#moodleCalendarView .calendar-day-modal-date-value {
  font-size: 1.3rem;
  line-height: 1.1;
}

#moodleCalendarView .calendar-day-modal-copy {
  min-width: 0;
}

#moodleCalendarView .calendar-day-modal-kicker {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 0.2rem;
}

#moodleCalendarView .calendar-day-modal-title {
  margin: 0;
  font-size: 1.12rem;
  color: var(--charcoal);
}

#moodleCalendarView .calendar-day-modal-desc {
  margin: 0.35rem 0 0;
  color: var(--gray-500);
  line-height: 1.6;
  font-size: 0.9rem;
}

#moodleCalendarView .calendar-day-event-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}

#moodleCalendarView .calendar-day-event-item {
  width: 100%;
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(248,245,239,0.9));
  text-align: left;
  padding: 1rem 1rem 1.05rem;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.65);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

#moodleCalendarView .calendar-day-event-item:hover {
  transform: translateY(-2px);
  border-color: rgba(87, 109, 72, 0.22);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.08);
}

#moodleCalendarView .calendar-day-event-item:focus-visible {
  outline: 2px solid rgba(74, 93, 35, 0.24);
  outline-offset: 3px;
}

#moodleCalendarView .calendar-day-event-item.tone-assignment {
  border-color: rgba(193, 122, 94, 0.18);
}

#moodleCalendarView .calendar-day-event-item.tone-quiz {
  border-color: rgba(91, 107, 214, 0.2);
}

#moodleCalendarView .calendar-day-event-item.tone-course {
  border-color: rgba(87, 109, 72, 0.2);
}

#moodleCalendarView .calendar-day-event-item.tone-personal {
  border-color: rgba(14, 165, 233, 0.2);
}

#moodleCalendarView .calendar-day-event-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.7rem;
}

#moodleCalendarView .calendar-day-event-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.36rem 0.72rem;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

#moodleCalendarView .calendar-day-event-badge.type-assignment {
  background: rgba(193, 122, 94, 0.14);
  color: var(--terracotta-dark);
}

#moodleCalendarView .calendar-day-event-badge.type-quiz {
  background: rgba(91, 107, 214, 0.14);
  color: #3f51b5;
}

#moodleCalendarView .calendar-day-event-badge.type-course {
  background: rgba(87, 109, 72, 0.14);
  color: var(--olive-deep);
}

#moodleCalendarView .calendar-day-event-badge.type-personal {
  background: rgba(14, 165, 233, 0.12);
  color: #0f6f91;
}

#moodleCalendarView .calendar-day-event-open {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gray-500);
}

#moodleCalendarView .calendar-day-event-main {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

#moodleCalendarView .calendar-day-event-copy {
  min-width: 0;
  flex: 1;
}

#moodleCalendarView .calendar-day-event-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--charcoal);
  line-height: 1.45;
}

#moodleCalendarView .calendar-day-event-course {
  font-size: 0.84rem;
  color: var(--gray-500);
  margin-top: 0.32rem;
  line-height: 1.5;
}

#moodleCalendarView .calendar-day-event-time {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 88px;
  padding: 0.42rem 0.72rem;
  border-radius: 999px;
  background: rgba(26, 58, 92, 0.06);
  color: var(--olive-deep);
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
}

#calendarDayEventsModal .modal-scroll-body {
  overscroll-behavior: contain;
}

#calendarDayEventsModal .calendar-day-modal-shell {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

#calendarDayEventsModal .calendar-day-modal-hero {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.1rem;
  border-radius: 22px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background:
    radial-gradient(circle at top right, rgba(122, 148, 115, 0.12), transparent 38%),
    linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(248,245,239,0.92) 100%);
}

#calendarDayEventsModal .calendar-day-modal-date-card {
  min-width: 108px;
  padding: 1rem 0.95rem;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--olive-deep) 0%, var(--olive) 100%);
  color: var(--cream);
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  box-shadow: 0 14px 26px rgba(26, 58, 92, 0.18);
}

#calendarDayEventsModal .calendar-day-modal-date-top {
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.78;
}

#calendarDayEventsModal .calendar-day-modal-date-value {
  font-size: 1.3rem;
  line-height: 1.1;
}

#calendarDayEventsModal .calendar-day-modal-copy,
#calendarDayEventsModal .calendar-day-event-copy {
  min-width: 0;
}

#calendarDayEventsModal .calendar-day-modal-kicker {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 0.2rem;
}

#calendarDayEventsModal .calendar-day-modal-title {
  margin: 0;
  font-size: 1.12rem;
  color: var(--charcoal);
  text-wrap: balance;
}

#calendarDayEventsModal .calendar-day-modal-desc {
  margin: 0.35rem 0 0;
  color: var(--gray-500);
  line-height: 1.6;
  font-size: 0.9rem;
}

#calendarDayEventsModal .calendar-day-event-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

#calendarDayEventsModal .calendar-day-event-item {
  width: 100%;
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(248,245,239,0.9));
  text-align: left;
  padding: 1rem 1rem 1.05rem;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.65);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

#calendarDayEventsModal .calendar-day-event-item:hover {
  transform: translateY(-2px);
  border-color: rgba(87, 109, 72, 0.22);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.08);
}

#calendarDayEventsModal .calendar-day-event-item:focus-visible {
  outline: 2px solid rgba(74, 93, 35, 0.24);
  outline-offset: 3px;
}

#calendarDayEventsModal .calendar-day-event-item.tone-assignment {
  border-color: rgba(193, 122, 94, 0.18);
}

#calendarDayEventsModal .calendar-day-event-item.tone-quiz {
  border-color: rgba(91, 107, 214, 0.2);
}

#calendarDayEventsModal .calendar-day-event-item.tone-course {
  border-color: rgba(87, 109, 72, 0.2);
}

#calendarDayEventsModal .calendar-day-event-item.tone-personal {
  border-color: rgba(14, 165, 233, 0.2);
}

#calendarDayEventsModal .calendar-day-event-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.7rem;
  flex-wrap: wrap;
}

#calendarDayEventsModal .calendar-day-event-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.36rem 0.72rem;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

#calendarDayEventsModal .calendar-day-event-badge.type-assignment {
  background: rgba(193, 122, 94, 0.14);
  color: var(--terracotta-dark);
}

#calendarDayEventsModal .calendar-day-event-badge.type-quiz {
  background: rgba(91, 107, 214, 0.14);
  color: #3f51b5;
}

#calendarDayEventsModal .calendar-day-event-badge.type-course {
  background: rgba(87, 109, 72, 0.14);
  color: var(--olive-deep);
}

#calendarDayEventsModal .calendar-day-event-badge.type-personal {
  background: rgba(14, 165, 233, 0.12);
  color: #0f6f91;
}

#calendarDayEventsModal .calendar-day-event-open {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gray-500);
  white-space: nowrap;
}

#calendarDayEventsModal .calendar-day-event-main {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

#calendarDayEventsModal .calendar-day-event-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--charcoal);
  line-height: 1.45;
  word-break: break-word;
}

#calendarDayEventsModal .calendar-day-event-course {
  font-size: 0.84rem;
  color: var(--gray-500);
  margin-top: 0.32rem;
  line-height: 1.5;
  word-break: break-word;
}

#calendarDayEventsModal .calendar-day-event-time {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 88px;
  padding: 0.42rem 0.72rem;
  border-radius: 999px;
  background: rgba(26, 58, 92, 0.06);
  color: var(--olive-deep);
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
}

.calendar-day-modal-shell {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.calendar-day-modal-hero {
  display: grid;
  grid-template-columns: minmax(140px, auto) minmax(0, 1fr);
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.1rem;
  border-radius: 22px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background:
    radial-gradient(circle at top right, rgba(122, 148, 115, 0.12), transparent 38%),
    linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(248,245,239,0.92) 100%);
}

.calendar-day-event-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.calendar-day-event-item {
  display: block;
  width: 100%;
  min-height: 100%;
}

.calendar-day-event-title,
.calendar-day-event-course {
  word-break: break-word;
}

.calendar-day-event-open {
  white-space: nowrap;
}

/* 即將到來的事件 */
.upcoming-events {
  padding: 1.5rem;
  border-top: 1px solid var(--gray-100);
}

.upcoming-events h3 {
  font-size: 1rem;
  margin-bottom: 1rem;
}

.event-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.event-item {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  background: var(--gray-50);
  border-radius: 8px;
}

.event-date {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.5rem 1rem;
  background: var(--white);
  border-radius: 8px;
  min-width: 60px;
}

.event-date .day {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--olive);
}

.event-date .month {
  font-size: 0.75rem;
  color: var(--gray-500);
}

.event-info {
  flex: 1;
}

.event-info .event-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.event-info .event-course {
  font-size: 0.85rem;
  color: var(--gray-500);
}

.event-info .event-time {
  font-size: 0.8rem;
  color: var(--gray-400);
  margin-top: 0.25rem;
}

/* ==================== 通知中心樣式 ==================== */
.notification-center {
  position: relative;
  background: linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(248,245,239,0.98) 100%);
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-radius: 28px;
  box-shadow: 0 24px 44px rgba(15, 23, 42, 0.08);
  overflow: hidden;
}

.notification-center::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, rgba(45, 43, 107, 0.72), rgba(87, 109, 72, 0.48));
}

.notification-center .notification-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.25rem;
  padding: 1.35rem 1.5rem 1rem;
  border-bottom: 1px solid rgba(26, 58, 92, 0.08);
}

.notification-page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.3rem 1.5rem 1rem;
  border-bottom: 1px solid rgba(26, 58, 92, 0.08);
}

.notification-shell-copy {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
  flex: 1 1 auto;
}

.notification-shell-kicker {
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-500);
  font-weight: 700;
}

.notification-center .notification-header h2 {
  font-size: 1.28rem;
  color: var(--charcoal);
}

.notification-shell-desc {
  margin: 0;
  color: var(--gray-500);
  font-size: 0.9rem;
  line-height: 1.55;
}

.notification-center .notification-actions {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  flex: 0 0 auto;
  padding: 0.28rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.72);
  border: 1px solid rgba(26, 58, 92, 0.08);
  box-shadow: 0 12px 22px rgba(15, 23, 42, 0.05);
}

.notification-center .notification-actions .btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  min-height: 38px;
  padding: 0.52rem 0.86rem;
  border: 1px solid transparent;
  background: rgba(255,255,255,0.92);
  color: var(--navy, #1A3A5C);
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  flex: 0 0 auto;
  box-shadow: none;
}

.notification-center .notification-actions .btn-secondary:hover {
  background: rgba(26, 58, 92, 0.08);
  border-color: rgba(26, 58, 92, 0.1);
}

.notification-page-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
  flex: 0 0 auto;
}

.notification-page-action {
  appearance: none;
  border: 1px solid rgba(26, 58, 92, 0.1);
  border-radius: 999px;
  background: var(--navy, #1A3A5C);
  color: white;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0.62rem 1.1rem;
  font: inherit;
  font-weight: 800;
  line-height: 1;
  white-space: nowrap;
  box-shadow: 0 12px 22px rgba(26, 58, 92, 0.14);
}

.notification-page-action.is-muted {
  background: rgba(255,255,255,0.82);
  color: var(--navy, #1A3A5C);
  box-shadow: none;
}

.notification-center .notification-list {
  max-height: 640px;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.notification-center .notification-list:empty {
  display: none;
}

.notification-center .notification-item {
  position: relative;
  display: flex;
  gap: 1rem;
  padding: 1rem 1rem 1rem 1.05rem;
  border-radius: 20px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: rgba(255,255,255,0.94);
  cursor: pointer;
  width: 100%;
  appearance: none;
  text-align: left;
  color: inherit;
  font: inherit;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.notification-center .notification-item:hover {
  transform: translateY(-2px);
  border-color: rgba(212, 165, 116, 0.28);
  box-shadow: 0 16px 28px rgba(15, 23, 42, 0.08);
}

.notification-center .notification-item:focus-visible {
  outline: 3px solid rgba(74, 93, 35, 0.22);
  outline-offset: 3px;
}

.notification-center .notification-item.unread {
  background: linear-gradient(180deg, rgba(245,247,255,0.98) 0%, rgba(255,255,255,0.96) 100%);
}

.notification-center .notification-item.unread::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 4px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--olive), var(--terracotta));
}

.notification-center .notification-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.notification-center .notification-icon.assignment {
  background: rgba(192, 101, 77, 0.14);
  color: var(--terracotta);
}

.notification-center .notification-icon.quiz {
  background: rgba(99, 102, 241, 0.14);
  color: #6366f1;
}

.notification-center .notification-icon.forum {
  background: rgba(212, 165, 116, 0.18);
  color: var(--olive-deep);
}

.notification-center .notification-icon.grade {
  background: rgba(74, 124, 89, 0.14);
  color: var(--success);
}

.notification-center .notification-icon.course {
  background: rgba(45, 43, 107, 0.12);
  color: var(--olive);
}

.notification-center .notification-icon.message {
  background: rgba(26, 58, 92, 0.12);
  color: var(--blue-700);
}

.notification-center .notification-content {
  flex: 1;
  min-width: 0;
}

.notification-card-head {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  align-items: flex-start;
}

.notification-content .title {
  font-weight: 700;
  color: var(--charcoal);
  margin-bottom: 0.15rem;
}

.notification-content .message {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--gray-500);
}

.notification-content .time {
  display: inline-flex;
  margin-top: 0.45rem;
  padding: 0.24rem 0.6rem;
  border-radius: 999px;
  background: rgba(26, 58, 92, 0.05);
  font-size: 0.75rem;
  color: var(--gray-500);
  font-weight: 600;
}

.notification-card-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.28rem 0.62rem;
  border-radius: 999px;
  background: rgba(45, 43, 107, 0.09);
  color: var(--olive);
  font-size: 0.74rem;
  font-weight: 700;
  white-space: nowrap;
}

.notification-message-inbox {
  margin: 0 1rem 0.75rem;
  padding: 1rem;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(247,250,252,0.94));
  border: 1px solid rgba(26, 58, 92, 0.09);
  box-shadow: 0 16px 28px rgba(15, 23, 42, 0.05);
}

.notification-message-inbox-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.85rem;
}

.notification-message-inbox-head h3 {
  margin: 0.2rem 0 0;
  color: var(--charcoal);
  font-size: 1rem;
}

.notification-message-thread-list {
  display: grid;
  gap: 0.65rem;
}

.notification-message-thread {
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.85rem;
  border-radius: 16px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: rgba(255,255,255,0.88);
  color: inherit;
  text-align: left;
  font: inherit;
  cursor: pointer;
}

.notification-message-thread:hover {
  border-color: rgba(45, 91, 136, 0.22);
  box-shadow: 0 12px 22px rgba(15, 23, 42, 0.07);
}

.notification-message-thread.is-unread {
  background: rgba(239, 246, 255, 0.92);
  border-color: rgba(45, 91, 136, 0.2);
}

.notification-message-thread-avatar {
  width: 40px;
  height: 40px;
  border-radius: 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  background: rgba(26, 58, 92, 0.1);
  color: var(--blue-700);
  font-weight: 800;
}

.notification-message-thread-avatar.large {
  width: 54px;
  height: 54px;
  border-radius: 17px;
  font-size: 1.1rem;
}

.notification-message-thread-copy {
  min-width: 0;
}

.notification-message-thread-title-row {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: center;
}

.notification-message-thread-title-row strong {
  color: var(--charcoal);
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.notification-message-thread-title-row span,
.notification-message-thread-course {
  color: var(--gray-500);
  font-size: 0.78rem;
  font-weight: 700;
}

.notification-message-thread-copy p {
  margin: 0.25rem 0 0;
  color: var(--gray-600);
  font-size: 0.9rem;
  line-height: 1.45;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.notification-message-unread {
  min-width: 28px;
  height: 28px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 0.45rem;
  background: var(--terracotta);
  color: white;
  font-weight: 800;
  font-size: 0.75rem;
}

.notification-read-thread-archive {
  margin: 0 1rem 1rem;
  border-radius: 18px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: rgba(255,255,255,0.72);
  overflow: hidden;
}

.notification-read-thread-archive summary {
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 0.9rem;
  color: var(--navy, #1A3A5C);
  font-weight: 800;
  list-style: none;
}

.notification-read-thread-archive summary::-webkit-details-marker {
  display: none;
}

.notification-read-thread-archive summary::after {
  content: "+";
  width: 26px;
  height: 26px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(26, 58, 92, 0.06);
}

.notification-read-thread-archive[open] summary::after {
  content: "-";
}

.notification-read-thread-archive summary strong {
  margin-left: auto;
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  background: rgba(26, 58, 92, 0.06);
  color: var(--gray-600);
  font-size: 0.78rem;
}

.notification-read-thread-list {
  display: grid;
  gap: 0.45rem;
  padding: 0 0.75rem 0.75rem;
}

.notification-read-thread {
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.65rem;
  padding: 0.62rem;
  border-radius: 14px;
  border: 1px solid rgba(26, 58, 92, 0.06);
  background: rgba(248, 250, 252, 0.86);
  color: inherit;
  cursor: pointer;
  font: inherit;
  text-align: left;
}

.notification-read-thread-avatar {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(26, 58, 92, 0.08);
  color: var(--blue-700);
  font-weight: 800;
}

.notification-read-thread-copy {
  min-width: 0;
  display: grid;
  gap: 0.12rem;
}

.notification-read-thread-copy strong,
.notification-read-thread-copy small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.notification-read-thread-copy small,
.notification-read-thread time,
.notification-read-thread-more {
  color: var(--gray-500);
  font-size: 0.76rem;
  font-weight: 700;
}

.notification-read-thread-more {
  padding: 0.35rem 0.6rem 0.1rem;
}

.notification-detail-shell {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.notification-detail-hero {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  padding: 1.1rem;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.94));
  border: 1px solid rgba(212, 197, 169, 0.28);
  box-shadow: 0 16px 28px rgba(15, 23, 42, 0.05);
}

.notification-detail-icon {
  width: 60px;
  height: 60px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26, 58, 92, 0.08);
  color: var(--olive);
}

.notification-detail-icon.assignment { background: rgba(192, 101, 77, 0.12); color: var(--terracotta); }
.notification-detail-icon.quiz { background: rgba(99, 102, 241, 0.14); color: #6366f1; }
.notification-detail-icon.forum { background: rgba(212, 165, 116, 0.18); color: var(--olive-deep); }
.notification-detail-icon.grade { background: rgba(74, 124, 89, 0.14); color: var(--success); }
.notification-detail-icon.course { background: rgba(45, 43, 107, 0.12); color: var(--olive); }
.notification-detail-icon.message { background: rgba(26, 58, 92, 0.12); color: var(--blue-700); }

.notification-detail-copy {
  min-width: 0;
}

.notification-detail-kicker {
  display: inline-flex;
  margin-bottom: 0.3rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.notification-detail-title {
  margin: 0;
  font-size: 1.22rem;
  color: var(--charcoal);
}

.notification-detail-message {
  margin: 0.45rem 0 0;
  color: var(--text-secondary);
  line-height: 1.65;
}

.notification-detail-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.85rem;
}

.notification-detail-summary-item {
  padding: 0.95rem 1rem;
  border-radius: 18px;
  background: rgba(248,245,239,0.86);
  border: 1px solid rgba(212, 197, 169, 0.28);
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.notification-detail-summary-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-500);
}

.notification-detail-summary-value {
  color: var(--charcoal);
  line-height: 1.5;
}

.notification-detail-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.course-message-compose,
.course-message-thread-shell {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.course-message-thread-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  align-items: center;
  padding: 1rem;
  border-radius: 20px;
  background: rgba(248,245,239,0.82);
  border: 1px solid rgba(212, 197, 169, 0.3);
}

.course-message-thread-head h3 {
  margin: 0.2rem 0 0;
  color: var(--charcoal);
  font-size: 1.08rem;
}

.course-message-thread-head p {
  margin: 0.2rem 0 0;
  color: var(--gray-500);
  font-weight: 700;
  font-size: 0.86rem;
}

.course-message-thread-messages {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: min(54vh, 520px);
  overflow-y: auto;
  padding: 0.9rem;
  border-radius: 20px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: linear-gradient(180deg, rgba(248,250,252,0.86), rgba(255,255,255,0.96));
}

.course-message-row {
  display: flex;
}

.course-message-row.is-mine {
  justify-content: flex-end;
}

.course-message-row.is-peer {
  justify-content: flex-start;
}

.course-message-bubble {
  max-width: min(78%, 520px);
  padding: 0.85rem 0.95rem;
  border-radius: 18px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: rgba(255,255,255,0.95);
  color: var(--charcoal, #2c2c2c);
  box-shadow: 0 10px 18px rgba(15, 23, 42, 0.04);
}

.course-message-row.is-mine .course-message-bubble {
  background: linear-gradient(135deg, var(--navy, #1A3A5C) 0%, var(--purple, #2D2B6B) 100%);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 12px 22px rgba(26, 58, 92, 0.16);
}

.course-message-meta {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 0.35rem;
  font-size: 0.78rem;
}

.course-message-meta span {
  color: var(--gray-500);
  font-weight: 700;
}

.course-message-meta strong,
.course-message-bubble p {
  color: inherit;
}

.course-message-row.is-mine .course-message-meta span {
  color: rgba(255,255,255,0.82);
}

.course-message-row.is-mine .course-message-meta strong,
.course-message-row.is-mine .course-message-bubble p {
  color: #fff;
}

.course-message-bubble p {
  margin: 0;
  line-height: 1.6;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.course-message-textarea {
  width: 100%;
  resize: vertical;
  min-height: 120px;
}

.course-message-reply-form {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

@media (max-width: 768px) {
  .quiz-report-hero,
  .quiz-report-insight-grid {
    grid-template-columns: 1fr;
  }

  .quiz-report-scoreboard {
    grid-template-columns: 1fr;
  }

  .notification-center .notification-header {
    flex-direction: column;
  }

  .notification-center .notification-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .notification-center .notification-actions .btn-secondary {
    flex: 0 0 auto;
    min-width: 0;
  }

  .notification-card-head {
    flex-direction: column;
  }

  .notification-message-inbox {
    margin: 0 0.75rem 0.75rem;
    padding: 0.85rem;
  }

  .notification-message-inbox-head {
    flex-direction: column;
    align-items: stretch;
  }

  .notification-message-thread {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .notification-message-unread {
    grid-column: 1 / -1;
    justify-self: flex-start;
  }

  .course-message-thread-head {
    grid-template-columns: 1fr;
  }

  .course-message-thread-messages {
    max-height: 48vh;
    padding: 0.7rem;
  }

  .course-message-bubble {
    max-width: 92%;
  }

  .course-message-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.15rem;
  }
}

/* ==================== 作業/測驗卡片樣式 ==================== */
.activity-picker-page {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.activity-picker-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.activity-picker-title {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
}

.activity-picker-icon {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--olive);
  background: linear-gradient(135deg, rgba(87, 109, 72, 0.14), rgba(159, 178, 140, 0.2));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.65);
  flex-shrink: 0;
}

.activity-picker-copy h2 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--charcoal);
}

.activity-picker-copy p {
  margin: 0.25rem 0 0;
  font-size: 0.92rem;
  color: var(--gray-500);
}

.activity-picker-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(296px, 1fr));
  gap: 1.35rem;
}

.activity-picker-card {
  --picker-accent: linear-gradient(135deg, rgba(87, 109, 72, 0.96) 0%, rgba(56, 73, 46, 0.96) 100%);
  --picker-tint: rgba(87, 109, 72, 0.1);
  --picker-tint-strong: rgba(87, 109, 72, 0.16);
  position: relative;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(250, 247, 241, 0.98) 100%);
  border: 1px solid rgba(26, 58, 92, 0.1);
  border-radius: 24px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
  box-shadow: 0 18px 38px rgba(15, 23, 42, 0.06);
}

.activity-picker-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 44px rgba(15, 23, 42, 0.1);
  border-color: rgba(26, 58, 92, 0.18);
}

.activity-picker-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.88), transparent 30%),
    radial-gradient(circle at 18% 16%, var(--picker-tint-strong), transparent 28%),
    linear-gradient(180deg, rgba(12, 29, 48, 0.02) 0%, transparent 42%);
  pointer-events: none;
}

.activity-picker-card-accent {
  position: relative;
  min-height: 146px;
  padding: 1.1rem 1.15rem 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
  background:
    radial-gradient(circle at 84% 22%, rgba(255, 255, 255, 0.28), transparent 20%),
    radial-gradient(circle at 14% 28%, rgba(255, 255, 255, 0.18), transparent 24%),
    var(--picker-accent);
  opacity: 0.96;
}

.activity-picker-card.tone-olive {
  --picker-accent: linear-gradient(135deg, #617451 0%, #3d5140 100%);
  --picker-tint: rgba(97, 116, 81, 0.1);
  --picker-tint-strong: rgba(97, 116, 81, 0.16);
}

.activity-picker-card.tone-violet {
  --picker-accent: linear-gradient(135deg, #4a5a92 0%, #2f4268 100%);
  --picker-tint: rgba(74, 90, 146, 0.12);
  --picker-tint-strong: rgba(74, 90, 146, 0.18);
}

.activity-picker-card.tone-sky {
  --picker-accent: linear-gradient(135deg, #2f6892 0%, #1f5076 100%);
  --picker-tint: rgba(47, 104, 146, 0.12);
  --picker-tint-strong: rgba(47, 104, 146, 0.18);
}

.activity-picker-card.tone-mint {
  --picker-accent: linear-gradient(135deg, #2e7c68 0%, #225f51 100%);
  --picker-tint: rgba(46, 124, 104, 0.12);
  --picker-tint-strong: rgba(46, 124, 104, 0.18);
}

.activity-picker-card.tone-gold {
  --picker-accent: linear-gradient(135deg, #9c7043 0%, #7b5631 100%);
  --picker-tint: rgba(156, 112, 67, 0.12);
  --picker-tint-strong: rgba(156, 112, 67, 0.18);
}

.activity-picker-card.tone-rose {
  --picker-accent: linear-gradient(135deg, #8f5567 0%, #69404e 100%);
  --picker-tint: rgba(143, 85, 103, 0.12);
  --picker-tint-strong: rgba(143, 85, 103, 0.18);
}

.activity-picker-card-body {
  position: relative;
  padding: 1.15rem 1.2rem 1.2rem;
  min-height: 164px;
  display: flex;
  flex-direction: column;
  gap: 0.95rem;
}

.activity-picker-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

.activity-picker-card-hero {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.activity-picker-card-chip,
.activity-picker-card-code {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-width: max-content;
  width: fit-content;
  padding: 0.42rem 0.78rem;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap !important;
  word-break: keep-all !important;
  flex: 0 0 auto !important;
  max-width: none;
}

.activity-picker-card-chip {
  background: rgba(255, 255, 255, 0.92);
  color: var(--charcoal);
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.12);
}

.activity-picker-card-code {
  background: rgba(12, 23, 35, 0.18);
  color: rgba(255, 255, 255, 0.92);
}

.activity-picker-card-copy {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.activity-picker-card-title {
  margin: 0;
  font-size: 1.28rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.98);
  letter-spacing: -0.02em;
  line-height: 1.3;
  text-wrap: balance;
}

.activity-picker-card-kicker {
  margin: 0;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 600;
}

.activity-picker-card-summary {
  margin: 0;
  color: var(--gray-600);
  font-size: 0.92rem;
  line-height: 1.72;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.activity-picker-card-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
  font-size: 0.82rem;
  color: var(--gray-500);
  padding-top: 1rem;
  border-top: 1px solid rgba(26, 58, 92, 0.08);
}

.activity-picker-card-teacher,
.activity-picker-card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
}

.activity-picker-card-teacher {
  color: var(--gray-500);
  font-size: 0.8rem;
  font-weight: 600;
}

.activity-picker-card-link {
  padding: 0.68rem 0.95rem;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(244, 239, 230, 0.96) 100%);
  color: var(--olive-deep);
  font-weight: 700;
  border: 1px solid rgba(26, 58, 92, 0.1);
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.08);
}

.activity-picker-card-link svg {
  width: 14px;
  height: 14px;
}

.activity-picker-card:hover .activity-picker-card-link {
  background: rgba(255, 255, 255, 0.98);
  border-color: rgba(26, 58, 92, 0.14);
}

.activity-shell {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.activity-shell-header {
  padding: 1.5rem 1.5rem 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.activity-shell-heading {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.activity-back-btn {
  padding: 0.65rem;
  border-radius: 12px;
}

.activity-shell-copy h2 {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--charcoal);
}

.activity-shell-copy p {
  margin: 0.28rem 0 0;
  font-size: 0.88rem;
  color: var(--gray-500);
}

.activity-shell-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.85rem;
}

.activity-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: var(--gray-100);
  color: var(--gray-600);
  font-size: 0.76rem;
  font-weight: 600;
}

.activity-shell-list {
  padding: 0 1.5rem 1.5rem;
}

.activity-empty-state {
  border: 1px dashed rgba(107, 114, 128, 0.2);
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(248, 250, 252, 0.96));
  border-radius: 18px;
  padding: 3rem 2rem;
  width: 100%;
  grid-column: 1 / -1;
  color: var(--gray-400);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.activity-empty-state svg {
  opacity: 0.55;
}

.activity-empty-state h3 {
  margin: 0;
  color: var(--charcoal);
  font-size: 1.05rem;
  font-weight: 600;
}

.activity-empty-state p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--gray-500);
}

.assignment-card,
.quiz-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.35rem 1.45rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.98));
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-radius: 22px;
  margin-bottom: 0.85rem;
  cursor: pointer;
  width: 100%;
  appearance: none;
  text-align: left;
  color: inherit;
  font: inherit;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.05);
}

.assignment-card:hover,
.quiz-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 32px rgba(15, 23, 42, 0.08);
  border-color: rgba(87, 109, 72, 0.18);
}

.assignment-card:focus-visible,
.quiz-card:focus-visible {
  outline: 3px solid rgba(74, 93, 35, 0.22);
  outline-offset: 3px;
}

.quiz-card {
  flex-direction: column;
  gap: 0.95rem;
}

.quiz-card-main {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  width: 100%;
  padding: 0;
  border: none;
  background: transparent;
  appearance: none;
  text-align: left;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

.quiz-card-main:focus-visible {
  outline: none;
}

.quiz-card:focus-within {
  outline: 3px solid rgba(74, 93, 35, 0.22);
  outline-offset: 3px;
}

.activity-card-open-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-radius: 999px;
  background: rgba(45, 43, 107, 0.08);
  color: var(--olive-deep);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

.activity-card-open-btn:focus-visible {
  outline: 2px solid rgba(74, 93, 35, 0.22);
  outline-offset: 3px;
  border-radius: 999px;
}

.assignment-icon,
.quiz-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.55);
}

.assignment-icon {
  background: rgba(192, 101, 77, 0.12);
  color: var(--terracotta);
}

.quiz-icon {
  background: rgba(124, 58, 237, 0.12);
  color: #7c3aed;
}

.assignment-info,
.quiz-info {
  flex: 1;
  min-width: 0;
}

.activity-card-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.activity-card-topline {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.activity-card-copy {
  min-width: 0;
}

.activity-card-kicker {
  display: inline-flex;
  align-items: center;
  padding: 0.34rem 0.68rem;
  border-radius: 999px;
  background: rgba(45, 43, 107, 0.08);
  color: var(--olive-deep);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.assignment-info h3,
.quiz-info h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin: 0.52rem 0 0;
  color: var(--charcoal);
  letter-spacing: -0.02em;
}

.activity-card-description {
  margin: 0;
  color: var(--gray-500);
  font-size: 0.88rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.assignment-course,
.quiz-course {
  font-size: 0.85rem;
  color: var(--gray-500);
}

.assignment-due {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-top: 0.25rem;
}

.assignment-due.overdue {
  color: var(--danger);
}

.quiz-meta {
  font-size: 0.8rem;
  color: var(--gray-400);
  margin-top: 0.25rem;
}

.activity-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0;
  font-size: 0.78rem;
}

.activity-card-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.42rem 0.76rem;
  border-radius: 999px;
  background: rgba(26, 58, 92, 0.05);
  color: var(--gray-500);
  font-weight: 600;
}

.activity-card-bottom-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  min-width: 0;
  width: 100%;
}

.quiz-card .activity-card-bottom-row {
  width: calc(100% - 68px);
  margin-left: calc(52px + 1rem);
}

.activity-card-bottom-row .activity-card-meta {
  flex: 1 1 18rem;
  min-width: 0;
}

.activity-card-bottom-row .activity-card-meta:empty {
  display: none;
}

.activity-card-bottom-row .activity-card-footer {
  flex: 0 0 auto;
  justify-content: flex-end;
  min-width: 0;
}

.activity-card-bottom-row .activity-card-footer:empty {
  display: none;
}

.activity-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: nowrap;
}

.activity-card-aside {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

.activity-card-metrics {
  display: flex;
  gap: 0.75rem;
}

.activity-card-metric {
  min-width: 78px;
  padding: 0.7rem 0.75rem;
  border-radius: 12px;
  background: var(--gray-50);
  text-align: center;
}

.quiz-card.is-teacher-card .activity-card-metric {
  border: 1px solid rgba(26, 58, 92, 0.18);
  background: linear-gradient(180deg, rgba(232, 238, 244, 0.98), rgba(216, 226, 230, 0.96));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.75), 0 6px 14px rgba(26, 58, 92, 0.06);
}

.quiz-card.is-teacher-card .activity-card-metric strong {
  color: var(--navy);
}

.quiz-card.is-teacher-card .activity-card-metric span {
  color: #5f6f7b;
}

.activity-card-metric strong {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--charcoal);
}

.activity-card-metric span {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.72rem;
  color: var(--gray-500);
}

.assignment-status,
.quiz-status {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
  flex-shrink: 0;
}

.activity-status-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.38rem 0.8rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
}

.activity-status-chip.is-neutral {
  background: var(--gray-100);
  color: var(--gray-600);
}

.activity-status-chip.is-success {
  background: #dcfce7;
  color: #166534;
}

.activity-status-chip.is-danger {
  background: #fee2e2;
  color: var(--danger);
}

.activity-status-chip.is-warning {
  background: #fef3c7;
  color: #92400e;
}

.activity-status-chip.is-accent {
  background: #dbeafe;
  color: #1d4ed8;
}

.assignment-status .grade,
.quiz-status .score {
  font-weight: 600;
  color: var(--olive);
  font-size: 0.9rem;
}

.activity-card-open {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: rgba(45, 43, 107, 0.08);
  border: 1px solid rgba(26, 58, 92, 0.08);
  color: var(--olive-deep);
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
}

.activity-inline-action {
  padding: 0.6rem 1rem;
  font-size: 0.85rem;
}

.forum-card-bottom-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  min-width: 0;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(26, 58, 92, 0.08);
}

.forum-card-bottom-row .forum-card-stats {
  flex: 1 1 18rem;
  min-width: 0;
}

.forum-card-bottom-row .forum-card-cta {
  flex: 0 0 auto;
}

@media (max-width: 768px) {
  .activity-picker-page,
  .activity-shell-list {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .activity-shell-header {
    padding: 1rem 1rem 0;
  }

  .activity-picker-page {
    padding-top: 1rem;
    padding-bottom: 1rem;
  }

  .activity-picker-grid {
    grid-template-columns: 1fr;
  }

  .activity-picker-header,
  .activity-shell-header,
  .activity-shell-heading {
    flex-direction: column;
    align-items: stretch;
  }

  .activity-picker-title {
    align-items: flex-start;
  }

  .assignment-card,
  .quiz-card,
  .assignment-card.is-teacher-card,
  .quiz-card.is-teacher-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    border-radius: 16px;
  }

  .quiz-card-main,
  .assignment-card-main {
    gap: 0.75rem;
  }

  .assignment-icon,
  .quiz-icon {
    width: 44px;
    height: 44px;
    border-radius: 14px;
  }

  .assignment-info h3,
  .quiz-info h3 {
    font-size: 1rem;
    line-height: 1.35;
    letter-spacing: 0;
    word-break: break-word;
    overflow-wrap: anywhere;
  }

  .activity-card-topline,
  .activity-card-footer,
  .assignment-status,
  .quiz-status,
  .activity-card-aside {
    width: 100%;
    align-items: flex-start;
    margin-left: 0;
  }

  .activity-card-footer {
    flex-wrap: wrap;
  }

  .activity-card-topline {
    gap: 0.75rem;
  }

  .activity-card-metrics {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .activity-card-metric {
    min-width: 0;
  }

  .activity-card-open,
  .activity-card-open-btn,
  .activity-inline-action {
    width: 100%;
    min-height: 44px;
  }

  .activity-card-meta span {
    border-radius: 10px;
    white-space: normal;
    word-break: break-word;
    overflow-wrap: anywhere;
  }
}

/* ==================== Tab 按鈕樣式 ==================== */
.tab-group {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
  background: var(--white);
  padding: 0.375rem;
  border-radius: 10px;
  width: fit-content;
}

.tab-btn {
  padding: 0.625rem 1.25rem;
  border: none;
  background: transparent;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-500);
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, opacity 0.2s, transform 0.2s, box-shadow 0.2s;
}

.tab-btn:hover {
  color: var(--charcoal);
  background: var(--gray-50);
}

.tab-btn.active {
  background: var(--olive);
  color: var(--cream);
}

/* ==================== 討論區列表項目 ==================== */
.forum-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.forum-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--white);
  border-radius: 12px;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, opacity 0.2s, transform 0.2s, box-shadow 0.2s;
}

.forum-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.forum-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: #f59e0b15;
  color: var(--warning);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.forum-info {
  flex: 1;
  min-width: 0;
}

.forum-info h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.forum-course {
  font-size: 0.85rem;
  color: var(--gray-500);
}

.forum-desc {
  font-size: 0.85rem;
  color: var(--gray-400);
  margin-top: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.forum-stats {
  display: flex;
  gap: 1rem;
  color: var(--gray-400);
  font-size: 0.85rem;
  flex-shrink: 0;
}

/* ==================== 測驗資訊頁面 ==================== */
.quiz-info-page {
  background: var(--white);
  border-radius: 12px;
  padding: 2rem;
}

.quiz-info-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 42px;
  padding: 0.25rem 0.35rem 0.25rem 0;
  border: 0;
  background: transparent;
  color: var(--navy);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.quiz-info-back-icon {
  width: 38px;
  height: 38px;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  border: 1px solid rgba(22, 50, 90, 0.1);
  border-radius: 12px;
  background: rgba(248, 250, 252, 0.92);
  color: var(--navy);
  box-shadow: 0 8px 20px rgba(16, 38, 68, 0.06);
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.quiz-info-back-btn:hover .quiz-info-back-icon {
  background: rgba(235, 241, 248, 0.95);
  border-color: rgba(22, 50, 90, 0.18);
  transform: translateX(-2px);
}

.quiz-info-header {
  margin: 1.5rem 0 2rem;
}

.quiz-info-header h1 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.quiz-description {
  color: var(--gray-600);
  line-height: 1.6;
}

.quiz-info-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.quiz-info-details .info-item {
  background: var(--gray-50);
  padding: 1.25rem;
  border-radius: 10px;
}

.quiz-info-details .label {
  display: block;
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-bottom: 0.5rem;
}

.quiz-info-details .value {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--charcoal);
}

.quiz-attempts-history {
  margin-bottom: 2rem;
}

.quiz-attempts-history h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.quiz-action {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--gray-100);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

@media (max-width: 768px) {
  .quiz-info-page {
    padding: 1rem;
    border-radius: 14px;
  }

  .quiz-info-back-btn {
    min-height: 40px;
    gap: 0.5rem;
    margin: -0.15rem 0 0.35rem;
    padding: 0;
    font-size: 0.92rem;
  }

  .quiz-info-back-icon {
    width: 36px;
    height: 36px;
    border-radius: 11px;
    box-shadow: none;
  }

  .quiz-info-header {
    margin: 0.75rem 0 1rem;
  }

  .quiz-info-header h1 {
    font-size: 1.28rem;
    line-height: 1.35;
    word-break: break-word;
    overflow-wrap: anywhere;
  }

  .quiz-description {
    font-size: 0.95rem;
  }

  .quiz-info-details {
    grid-template-columns: 1fr;
    gap: 0.65rem;
    margin-bottom: 1.25rem;
  }

  .quiz-info-details .info-item {
    padding: 0.85rem;
  }

  .quiz-action {
    padding-top: 1rem;
  }

  .quiz-action .btn-lg {
    width: 100%;
    min-height: 48px;
  }
}

.not-available-message {
  color: var(--gray-500);
  font-size: 1rem;
}

/* ==================== 討論詳情頁面 ==================== */
.discussion-main {
  margin-top: 1.5rem;
}

.main-post {
  background: var(--gray-50);
  border-radius: 12px;
  padding: 1.5rem;
  flex-direction: column;
}

.main-post .post-header {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: flex-start;
  margin-bottom: 1rem;
}

.main-post .post-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--olive);
  color: var(--cream);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1.2rem;
}

.main-post .post-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.main-post .author-name {
  font-weight: 600;
  font-size: 1rem;
}

.main-post .post-time {
  font-size: 0.8rem;
  color: var(--gray-500);
}

.main-post .post-title {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.main-post .post-content {
  line-height: 1.7;
  color: var(--gray-700);
}

.replies-section {
  margin-top: 2rem;
}

.replies-section h3 {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--gray-600);
}

.reply-post {
  display: flex;
  gap: 1rem;
  flex-direction: row;
}

.reply-post .post-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gray-200);
  color: var(--gray-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.reply-post .post-content {
  flex: 1;
}

.reply-post .post-header {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: flex-start;
}

.reply-post .post-meta {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.reply-post .author-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.reply-post .post-time {
  font-size: 0.8rem;
  color: var(--gray-500);
}

.btn-like {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.5rem;
  background: var(--gray-100);
  border: none;
  border-radius: 6px;
  font-size: 0.85rem;
  color: var(--gray-500);
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, opacity 0.2s, transform 0.2s, box-shadow 0.2s;
}

.btn-like:hover {
  background: var(--gray-200);
}

.btn-like.liked {
  background: #fee2e2;
  color: var(--danger);
}

.reply-form h4 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.locked-notice {
  text-align: center;
  padding: 1.5rem;
  background: var(--gray-100);
  border-radius: 8px;
  color: var(--gray-500);
  margin-top: 1rem;
}

/* ==================== 檔案選擇顯示 ==================== */
.selected-file {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.82);
  border: 1px solid rgba(212, 197, 169, 0.22);
  border-radius: 14px;
  margin-top: 0.5rem;
}

.selected-file .file-name {
  font-weight: 500;
}

.selected-file .file-size {
  color: var(--gray-500);
  font-size: 0.85rem;
}

/* ==================== 教師評分區域 ==================== */
.grading-area {
  padding-top: 1.4rem;
}

.no-submissions {
  color: var(--gray-500);
  text-align: center;
  padding: 0;
}

@media (max-width: 768px) {
  .assignment-hero,
  .assignment-panel,
  .submission-area,
  .grading-area {
    padding: 1.15rem;
    border-radius: 22px;
  }

  .assignment-hero-top,
  .assignment-panel-head,
  .assignment-submission-item {
    flex-direction: column;
    align-items: stretch;
  }

  .assignment-status {
    white-space: normal;
    align-self: flex-start;
  }

  .assignment-hero-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .assignment-meta-grid {
    grid-template-columns: 1fr;
  }

  .assignment-submission-actions {
    justify-content: stretch;
  }

  .assignment-file-row {
    align-items: flex-start;
  }

  .assignment-file-actions,
  .assignment-panel-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .assignment-submission-actions input,
  .assignment-submission-actions .btn-sm,
  .assignment-submission-actions .btn-primary {
    width: 100%;
  }
}

/* ==================== 即將到期事件側邊欄 ==================== */
.upcoming-sidebar {
  background: var(--white);
  border-radius: 12px;
  padding: 1.5rem;
}

.upcoming-sidebar h3 {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--gray-600);
}

#moodleCalendarView #upcomingEventsList {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ==================== 新增事件按鈕 ==================== */
#moodleCalendarView .calendar-more {
  display: block;
  font-size: 0.7rem;
  color: var(--gray-500);
  padding: 0.2rem;
  text-align: center;
}

/* ==================== 導航 Badge ==================== */
.nav-badge {
  background: var(--terracotta);
  color: var(--cream);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.1rem 0.5rem;
  border-radius: 20px;
  margin-left: auto;
}

/* ==================== 增強版成績簿管理 ==================== */
.gradebook-management {
  padding: 1rem;
}

.gradebook-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.gradebook-header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0;
}

.gradebook-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--white);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
}

.toolbar-left, .toolbar-right {
  display: flex;
  gap: 0.5rem;
}

.grade-categories-summary {
  margin-bottom: 1.5rem;
}

.grade-categories-summary h3 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1rem;
}

.category-card {
  position: relative;
  background:
    radial-gradient(circle at top right, rgba(87, 109, 72, 0.1), transparent 36%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(248, 245, 239, 0.96) 100%);
  border: 1px solid rgba(26, 58, 92, 0.1);
  border-radius: 20px;
  padding: 1rem 1.05rem;
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.05);
  text-align: left;
}

.category-card .category-name {
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--charcoal);
}

.category-card .category-weight {
  color: var(--olive-deep);
  font-size: 0.9rem;
  font-weight: 700;
}

.category-card .category-items {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-top: 0.4rem;
}

.gradebook-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.gradebook-stats .stat-card {
  --gradebook-stat-accent: linear-gradient(135deg, rgba(87, 109, 72, 0.92), rgba(56, 73, 46, 0.92));
  --gradebook-stat-tint: rgba(87, 109, 72, 0.12);
  position: relative;
  background:
    radial-gradient(circle at top right, var(--gradebook-stat-tint), transparent 42%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.985) 0%, rgba(248, 245, 239, 0.96) 100%);
  border: 1px solid rgba(26, 58, 92, 0.1);
  border-radius: 22px;
  padding: 1.05rem 1.1rem 1rem;
  text-align: left;
  box-shadow: 0 16px 30px rgba(15, 23, 42, 0.05);
  overflow: hidden;
}

.gradebook-stats .stat-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--gradebook-stat-accent);
}

.gradebook-stats .stat-card.tone-olive {
  --gradebook-stat-accent: linear-gradient(135deg, #617451 0%, #3d5140 100%);
  --gradebook-stat-tint: rgba(97, 116, 81, 0.12);
}

.gradebook-stats .stat-card.tone-violet {
  --gradebook-stat-accent: linear-gradient(135deg, #4a5a92 0%, #2f4268 100%);
  --gradebook-stat-tint: rgba(74, 90, 146, 0.12);
}

.gradebook-stats .stat-card.tone-sky {
  --gradebook-stat-accent: linear-gradient(135deg, #2f6892 0%, #1f5076 100%);
  --gradebook-stat-tint: rgba(47, 104, 146, 0.12);
}

.gradebook-stats .stat-card.tone-gold {
  --gradebook-stat-accent: linear-gradient(135deg, #9c7043 0%, #7b5631 100%);
  --gradebook-stat-tint: rgba(156, 112, 67, 0.12);
}

.gradebook-stats .stat-eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 0.38rem 0.72rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--gray-600);
  font-size: 0.74rem;
  font-weight: 700;
  box-shadow: 0 10px 18px rgba(15, 23, 42, 0.06);
  margin-bottom: 0.85rem;
}

.gradebook-stats .stat-value {
  font-size: 1.95rem;
  font-weight: 700;
  color: var(--charcoal);
  line-height: 1.05;
}

.gradebook-stats .stat-label {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-top: 0.35rem;
}

.gradebook-table-container {
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.98));
  border-radius: 24px;
  box-shadow: 0 18px 32px rgba(15, 23, 42, 0.08);
  overflow: hidden;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(26, 58, 92, 0.08);
}

.gradebook-table-wrapper {
  overflow-x: auto;
  max-height: 60vh;
}

.gradebook-table.editable {
  width: 100%;
  border-collapse: collapse;
}

.gradebook-table th,
.gradebook-table td {
  padding: 0.72rem 0.78rem;
  border-bottom: 1px solid var(--gray-200);
  text-align: center;
  min-width: 80px;
}

.gradebook-table th {
  background: linear-gradient(180deg, rgba(245, 247, 250, 0.98), rgba(237, 242, 247, 0.98));
  font-weight: 600;
  font-size: 0.85rem;
  position: sticky;
  top: 0;
  z-index: 10;
}

.gradebook-table .sticky-col {
  position: sticky;
  left: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.99), rgba(248,245,239,0.97));
  z-index: 5;
  min-width: 170px;
  text-align: left;
}

.gradebook-table th.sticky-col {
  z-index: 15;
  background: linear-gradient(180deg, rgba(245, 247, 250, 0.98), rgba(237, 242, 247, 0.98));
}

.student-info {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
}

.student-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--olive-muted);
  color: var(--olive);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.student-info strong {
  display: block;
  color: var(--charcoal);
  font-size: 0.9rem;
  line-height: 1.35;
}

.student-info small {
  display: block;
  margin-top: 0.12rem;
  color: var(--gray-500);
  font-size: 0.76rem;
  line-height: 1.4;
}

.grade-cell {
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s;
  font-weight: 700;
}

.grade-cell-content {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.grade-cell-reset-btn {
  appearance: none;
  border: 1px solid rgba(167, 82, 66, 0.18);
  border-radius: 999px;
  background: rgba(167, 82, 66, 0.08);
  color: #8f3f33;
  cursor: pointer;
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1;
  padding: 0.34rem 0.58rem;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
  white-space: nowrap;
}

.grade-cell-reset-btn:hover {
  background: rgba(167, 82, 66, 0.14);
  border-color: rgba(167, 82, 66, 0.28);
  color: #743126;
  transform: translateY(-1px);
}

.grade-cell-reset-btn:disabled {
  cursor: wait;
  opacity: 0.65;
  transform: none;
}

.grade-cell:hover {
  background: rgba(87, 109, 72, 0.08);
  box-shadow: inset 0 0 0 1px rgba(87, 109, 72, 0.14);
}

.grade-cell.not-graded {
  color: var(--gray-400);
  font-weight: 600;
}

.grade-cell .grade-input {
  width: 60px;
  padding: 0.25rem;
  border: 2px solid var(--olive);
  border-radius: 4px;
  text-align: center;
  font-size: 0.9rem;
}

.grade-cell .has-feedback {
  margin-left: 0.25rem;
  font-size: 0.75rem;
}

.total-cell {
  background: var(--cream-dark);
}

.letter-cell .letter-grade {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.85rem;
}

.letter-grade.grade-a { background: #d4edda; color: #155724; }
.letter-grade.grade-b { background: #cce5ff; color: #004085; }
.letter-grade.grade-c { background: #fff3cd; color: #856404; }
.letter-grade.grade-d { background: #ffe8cc; color: #856404; }
.letter-grade.grade-f { background: #f8d7da; color: #721c24; }

.item-header {
  max-width: 120px;
}

.item-header .item-name {
  font-weight: 600;
  font-size: 0.8rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.item-header .item-meta {
  font-size: 0.7rem;
  color: var(--gray-500);
}

.item-header .item-category {
  font-size: 0.65rem;
  color: var(--olive);
  background: var(--olive-muted);
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
  margin-top: 0.25rem;
  display: inline-block;
}

.sort-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-left: 0.25rem;
}

.sort-btn:hover {
  color: var(--olive);
}

.grade-scale-info {
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  border: 1px solid rgba(15, 23, 42, 0.06);
  border-radius: 16px;
  padding: 1.25rem 1.5rem;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.04);
}

.grade-scale-info h3 {
  margin: 0 0 1rem;
  color: #1a2885;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.scale-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.scale-item {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 0.95rem 0.45rem 0.5rem;
  background: #ffffff;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 999px;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.scale-item:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(15, 23, 42, 0.08);
}

.scale-item .letter-grade {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0;
  flex-shrink: 0;
}

.scale-item .score-range {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--charcoal);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* Solid-fill colored letter badges (override the muted table look in this context) */
.scale-item .letter-grade.grade-a { background: #16a34a; color: #ffffff; }
.scale-item .letter-grade.grade-b { background: #2563eb; color: #ffffff; }
.scale-item .letter-grade.grade-c { background: #f59e0b; color: #ffffff; }
.scale-item .letter-grade.grade-d { background: #f97316; color: #ffffff; }
.scale-item .letter-grade.grade-f { background: #ef4444; color: #ffffff; }

/* ==================== 題庫管理 ==================== */
.question-bank-page {
  padding: 1rem;
}

.qb-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.qb-header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0;
}

.qb-actions {
  display: flex;
  gap: 0.5rem;
}

.qb-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 1.5rem;
}

.qb-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.qb-sidebar-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.92));
  border-radius: 22px;
  padding: 1rem;
  border: 1px solid rgba(26, 58, 92, 0.08);
  box-shadow: 0 16px 28px rgba(15, 23, 42, 0.05);
}

.qb-sidebar-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.9rem;
}

.qb-sidebar-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 0.28rem;
}

.qb-categories h3,
.qb-type-filter h3,
.qb-search-copy h3 {
  font-size: 0.98rem;
  font-weight: 700;
  margin: 0;
  color: var(--charcoal);
}

.qb-search-shell {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding: 1rem 1.05rem;
  border-radius: 22px;
  border: 1px solid rgba(26, 58, 92, 0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.92));
  box-shadow: 0 16px 28px rgba(15, 23, 42, 0.05);
}

.qb-search-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
}

.qb-search-copy {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.qb-filter-summary {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.qb-filter-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.72rem;
  border-radius: 999px;
  background: rgba(26, 58, 92, 0.06);
  color: var(--olive-deep);
  font-size: 0.76rem;
  font-weight: 700;
}

.category-tree .category-item {
  padding: 0.62rem 0.85rem;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s, transform 0.2s;
}

.category-tree .category-item:hover {
  background: var(--gray-100);
  transform: translateX(2px);
}

.category-tree .category-item.active {
  background: var(--olive-muted);
  color: var(--olive);
  font-weight: 700;
}

.category-tree .count {
  font-size: 0.75rem;
  background: var(--gray-200);
  padding: 0.14rem 0.5rem;
  border-radius: 999px;
}

.type-checkboxes {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0.62rem 0.72rem;
  border-radius: 14px;
  background: rgba(255,255,255,0.72);
  border: 1px solid rgba(26, 58, 92, 0.06);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.checkbox-item:hover {
  background: rgba(248,245,239,0.92);
  border-color: rgba(74, 93, 35, 0.14);
}

.checkbox-item input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--olive);
}

.qb-main {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.qb-search {
  display: flex;
  gap: 0.5rem;
}

.qb-search input {
  flex: 1;
  padding: 0.85rem 1rem;
  border: 1px solid rgba(26, 58, 92, 0.12);
  border-radius: 14px;
  font-size: 0.95rem;
  background: rgba(255,255,255,0.86);
}

.qb-search .btn-search {
  padding: 0.75rem 1.2rem;
  background: var(--olive);
  color: var(--cream);
  border: none;
  border-radius: 14px;
  cursor: pointer;
  font-weight: 700;
}

.qb-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.question-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.92));
  border-radius: 22px;
  padding: 1.25rem;
  border: 1px solid rgba(26, 58, 92, 0.08);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.05);
}

.question-card .question-header {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.question-card .question-type {
  background: var(--olive-muted);
  color: var(--olive);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.question-card .question-category {
  background: var(--gray-100);
  color: var(--gray-600);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
}

.question-card .question-difficulty {
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.difficulty-easy { background: #d4edda; color: #155724; }
.difficulty-medium { background: #fff3cd; color: #856404; }
.difficulty-hard { background: #f8d7da; color: #721c24; }

.question-card .question-text {
  font-size: 1rem;
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.question-card .question-options {
  list-style: none;
  padding: 0;
  margin: 0 0 0.75rem 0;
}

.question-card .question-options li {
  padding: 0.4rem 0.75rem;
  margin-bottom: 0.25rem;
  background: var(--gray-50);
  border-radius: 4px;
  font-size: 0.9rem;
}

.question-card .question-options li.correct {
  background: #d4edda;
  color: #155724;
}

.question-card .question-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.75rem;
  border-top: 1px solid var(--gray-200);
}

.question-card .question-tags {
  display: flex;
  gap: 0.3rem;
}

.question-card .tag {
  background: var(--gray-100);
  color: var(--gray-600);
  padding: 0.15rem 0.5rem;
  border-radius: 10px;
  font-size: 0.7rem;
}

.question-card .question-actions {
  display: flex;
  gap: 0.25rem;
}

/* ==================== 課程完成追蹤 ==================== */
.completion-status-card {
  background: var(--white);
  border-radius: 12px;
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.completion-status-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.completion-progress {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.completion-progress .progress-bar {
  flex: 1;
  height: 8px;
  background: var(--gray-200);
  border-radius: 4px;
  overflow: hidden;
}

.completion-progress .progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--olive) 0%, var(--success) 100%);
  border-radius: 4px;
  transition: width var(--transition-base);
}

.completion-progress .progress-text {
  font-size: 0.85rem;
  color: var(--gray-600);
  white-space: nowrap;
}

.completion-checklist {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem 0;
}

.completion-checklist li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--gray-100);
}

.completion-checklist li:last-child {
  border-bottom: none;
}

.completion-checklist li.completed {
  color: var(--success);
}

.completion-checklist li.completed .check-icon {
  color: var(--success);
}

.completion-checklist .check-icon {
  font-size: 1rem;
}

.completion-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem;
  background: linear-gradient(135deg, var(--success) 0%, #38f9d7 100%);
  color: var(--white);
  border-radius: 8px;
  font-weight: 600;
}

.completion-badge .badge-icon {
  font-size: 1.25rem;
}

/* ==================== 條件設定 ==================== */
.criterion-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  background: var(--gray-50);
  border-radius: 6px;
  margin-bottom: 0.5rem;
}

.criterion-item .criterion-type {
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--gray-300);
  border-radius: 4px;
  font-size: 0.9rem;
}

.criterion-item .criterion-options {
  flex: 1;
}

.criterion-item .criterion-value {
  width: 100px;
  padding: 0.4rem;
  border: 1px solid var(--gray-300);
  border-radius: 4px;
}

/* ==================== Modal 增強 ==================== */
.modal-lg .modal-content {
  max-width: 800px;
}

.form-row {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
}

.form-row .form-group {
  flex: 1;
}

.radio-group {
  display: flex;
  gap: 1.5rem;
}

.radio-group label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.option-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.choice-option-item {
  align-items: stretch;
}

.option-item input[type="radio"],
.option-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--olive);
}

.option-item .option-input,
.option-item .matching-prompt-input,
.option-item .matching-answer-input,
.option-item .ordering-item-input,
.option-item .cloze-id-input,
.option-item .cloze-answer-input {
  flex: 1;
  padding: 0.5rem;
  border: 1px solid var(--gray-300);
  border-radius: 4px;
}

.matching-pair-item,
.cloze-answer-item {
  flex-wrap: wrap;
}

.cloze-answer-item label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.btn-remove {
  background: none;
  border: none;
  color: var(--danger);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.25rem;
}

.btn-remove:hover {
  color: #c82333;
}

.switch-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
}

.switch-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--olive);
}

.category-list .category-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem;
  background: var(--gray-50);
  border-radius: 6px;
  margin-bottom: 0.5rem;
}

.category-list .category-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.category-list .category-name {
  font-weight: 500;
}

.category-list .category-weight {
  color: var(--olive);
  font-size: 0.85rem;
}

.category-list .category-actions {
  display: flex;
  gap: 0.25rem;
}

/* ==================== 角色權限管理 ==================== */
.roles-management-page {
  padding: 1.5rem;
}

.roles-content {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.roles-sidebar {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 1rem;
  box-shadow: var(--shadow-sm);
}

.roles-sidebar h3 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--gray-200);
}

.roles-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.role-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  width: 100%;
  appearance: none;
  text-align: left;
  color: inherit;
  font: inherit;
  transition: var(--transition-fast);
  border: 1px solid transparent;
}

.role-item:hover {
  background: var(--gray-50);
}

.role-item.active {
  background: var(--olive-muted);
  border-color: var(--olive-light);
}

.role-item:focus-visible {
  outline: 3px solid rgba(74, 93, 35, 0.22);
  outline-offset: 3px;
}

.role-item.system-role {
  position: relative;
}

.role-item.system-role::after {
  content: '系統';
  position: absolute;
  right: 0.5rem;
  top: 0.25rem;
  font-size: 0.6rem;
  color: var(--gray-400);
  background: var(--gray-100);
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
}

.role-icon {
  font-size: 1.25rem;
}

.role-info {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.role-name {
  font-weight: 500;
  font-size: 0.9rem;
}

.role-type {
  font-size: 0.75rem;
  color: var(--gray-500);
}

.role-user-count {
  font-size: 0.75rem;
  color: var(--gray-500);
  background: var(--gray-100);
  padding: 0.2rem 0.5rem;
  border-radius: 10px;
}

.roles-detail {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  min-height: 400px;
}

.role-detail-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.role-detail-header h3 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.role-detail-header p {
  color: var(--gray-500);
}

.role-info-card {
  background: var(--gray-50);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.info-row {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--gray-200);
}

.info-row:last-child {
  border-bottom: none;
}

.info-row .label {
  color: var(--gray-500);
  font-size: 0.85rem;
}

.info-row .value {
  font-weight: 500;
}

.capabilities-section h4 {
  margin-bottom: 1rem;
  font-size: 1rem;
}

.capabilities-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-height: 400px;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.capability-category {
  background: var(--gray-50);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.capability-category h5 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
  color: var(--olive);
}

.capability-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.capability-item {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 0.5rem;
  align-items: start;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.capability-item:hover {
  background: var(--white);
}

.capability-item.readonly {
  cursor: default;
  opacity: 0.7;
}

.capability-item input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin-top: 2px;
}

.cap-name {
  font-weight: 500;
  font-size: 0.85rem;
  display: block;
}

.cap-desc {
  font-size: 0.75rem;
  color: var(--gray-500);
  display: block;
}

.role-actions {
  display: flex;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-200);
}

/* ==================== 課程類別管理 ==================== */
.course-categories-page {
  padding: 1.5rem;
}

.categories-content {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.categories-tree {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 1rem;
  box-shadow: var(--shadow-sm);
  max-height: 600px;
  overflow-y: auto;
}

.category-tree-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.category-tree-item {
  margin: 0.25rem 0;
}

.category-node {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0;
}

.expand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.9rem;
  height: 1.9rem;
  padding: 0;
  border: none;
  border-radius: 10px;
  background: transparent;
  appearance: none;
  font-size: 0.7rem;
  color: var(--gray-400);
  cursor: pointer;
  flex-shrink: 0;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.expand-icon:hover:not(:disabled) {
  background: var(--gray-100);
  color: var(--gray-600);
}

.expand-icon:focus-visible {
  outline: 2px solid rgba(74, 93, 35, 0.22);
  outline-offset: 2px;
}

.expand-icon.is-placeholder {
  cursor: default;
}

.category-node-main {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
  min-width: 0;
  padding: 0.5rem 0.75rem;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  appearance: none;
  text-align: left;
  color: inherit;
  font: inherit;
  cursor: pointer;
  transition: var(--transition-fast);
}

.category-node-main:hover {
  background: var(--gray-50);
}

.category-node.active .category-node-main {
  background: var(--olive-muted);
}

.category-node:focus-within .category-node-main {
  outline: 2px solid rgba(74, 93, 35, 0.22);
  outline-offset: 2px;
}

.category-node svg {
  color: var(--olive);
}

.category-name {
  flex: 1;
  font-weight: 500;
}

.course-count {
  font-size: 0.75rem;
  color: var(--gray-500);
}

.category-children {
  margin-left: 1rem;
}

.category-detail {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  min-height: 400px;
}

.category-detail-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.category-detail-header h3 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.category-detail-header p {
  color: var(--gray-500);
}

.category-info-card {
  background: var(--gray-50);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.category-courses {
  margin-top: 1rem;
}

.category-courses h4 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.courses-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.course-item-mini {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
}

.course-item-mini .course-name {
  font-weight: 500;
}

.course-item-mini .course-status {
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 10px;
  background: var(--success);
  color: var(--white);
}

.course-item-mini .course-status:contains("草稿") {
  background: var(--gray-400);
}

.category-actions {
  display: flex;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-200);
}

/* ==================== 空狀態 ==================== */
.empty-state-small {
  text-align: center;
  padding: 2rem;
  color: var(--gray-500);
}

.empty-state-small p {
  margin-bottom: 1rem;
}

.error-state {
  text-align: center;
  padding: 2rem;
  color: var(--danger);
}

/* ==================== 響應式設計 ==================== */
@media (max-width: 1024px) {
  .roles-content,
  .categories-content {
    grid-template-columns: 1fr;
  }

  .roles-sidebar,
  .categories-tree {
    max-height: 300px;
    overflow-y: auto;
  }
}

@media (max-width: 768px) {
  .qb-layout {
    grid-template-columns: 1fr;
  }

  .qb-sidebar {
    order: 2;
  }

  .qb-main {
    order: 1;
  }

  .qb-header,
  .qb-sidebar-head,
  .qb-search-head {
    flex-direction: column;
    align-items: stretch;
  }

  .qb-actions,
  .qb-filter-summary,
  .qb-search {
    width: 100%;
    flex-wrap: wrap;
  }

  .qb-search .btn-search {
    width: 100%;
  }

  .gradebook-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 0.6rem;
    padding: 0.85rem;
  }

  .toolbar-left,
  .toolbar-right {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
    justify-content: stretch;
    flex-wrap: nowrap;
  }

  .gradebook-toolbar .btn-primary,
  .gradebook-toolbar .btn-secondary {
    width: 100%;
    min-height: 44px;
    padding: 0.65rem 0.6rem;
    font-size: 0.9rem;
    border-radius: 10px;
    justify-content: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .gradebook-toolbar .btn-primary svg,
  .gradebook-toolbar .btn-secondary svg {
    flex: 0 0 auto;
  }

  .gradebook-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .role-actions,
  .category-actions {
    flex-direction: column;
  }
}

/* ==================== 學習路徑樣式 ==================== */
.learning-paths-container {
  padding: 1.5rem;
}

.learning-paths-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.learning-paths-header-stack {
  align-items: flex-start;
}

.learning-paths-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--olive-800);
}

.learning-paths-subtitle {
  margin-top: 0.4rem;
  color: var(--gray-500);
  line-height: 1.6;
}

.learning-paths-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.learning-path-card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.learning-path-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.path-thumbnail {
  height: 140px;
  background: linear-gradient(135deg, var(--olive-500), var(--olive-700));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 3rem;
  position: relative;
}

.path-thumbnail.tone-olive {
  background: linear-gradient(135deg, #6f7f5d, #4b5943);
}

.path-thumbnail.tone-violet {
  background: linear-gradient(135deg, #7c3aed, #5b21b6);
}

.path-thumbnail.tone-sky {
  background: linear-gradient(135deg, #2563eb, #0891b2);
}

.path-thumbnail.tone-mint {
  background: linear-gradient(135deg, #059669, #0f766e);
}

.path-thumbnail.tone-gold {
  background: linear-gradient(135deg, #d97706, #b45309);
}

.path-thumbnail.tone-rose {
  background: linear-gradient(135deg, #db2777, #be185d);
}

.path-thumbnail-icon {
  font-size: 2.6rem;
  line-height: 1;
}

.path-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.path-difficulty {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.path-difficulty.beginner {
  background: var(--success-light);
  color: var(--success);
}

.path-difficulty.intermediate {
  background: var(--warning-light);
  color: var(--warning);
}

.path-difficulty.advanced {
  background: var(--danger-light);
  color: var(--danger);
}

.learning-progress-pill {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.learning-progress-card {
  cursor: pointer;
}

.path-content {
  padding: 1.25rem;
}

.path-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--olive-800);
  margin-bottom: 0.5rem;
}

.path-description {
  font-size: 0.875rem;
  color: var(--gray-600);
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.path-stats {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  font-size: 0.8125rem;
  color: var(--gray-500);
}

.learning-progress-meta {
  row-gap: 0.4rem;
}

.path-stats span {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.path-progress {
  margin-bottom: 1rem;
}

.progress-bar {
  height: 6px;
  background: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 0.375rem;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--olive-500), var(--olive-600));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.progress-text {
  font-size: 0.75rem;
  color: var(--gray-500);
  text-align: right;
}

.path-actions {
  display: flex;
  gap: 0.75rem;
}

.path-actions .btn {
  flex: 1;
}

/* 學習路徑詳情 */
.learning-path-detail {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.5rem;
}

.path-detail-header {
  display: flex;
  gap: 2rem;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--gray-200);
}

.path-detail-image {
  width: 200px;
  height: 150px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  flex-shrink: 0;
}

.path-detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.path-detail-image .path-thumbnail {
  height: 100%;
}

.path-detail-info {
  flex: 1;
}

.path-detail-info h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--olive-800);
  margin-bottom: 0.75rem;
}

.path-courses-section h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--olive-800);
  margin-bottom: 1rem;
}

.path-course-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.path-course-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--gray-50);
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
}

.path-course-item.is-current {
  border-color: rgba(87, 109, 72, 0.28);
  background: rgba(87, 109, 72, 0.1);
}

.path-course-item.is-locked {
  background: var(--gray-100);
}

.path-course-item.is-openable {
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.03);
}

.course-order {
  width: 32px;
  height: 32px;
  background: var(--olive-500);
  color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.course-order.completed {
  background: var(--success);
}

.course-order.locked {
  background: var(--gray-400);
}

.course-info {
  flex: 1;
}

.course-info h4 {
  font-weight: 600;
  color: var(--olive-800);
  margin-bottom: 0.25rem;
}

.course-info p {
  font-size: 0.875rem;
  color: var(--gray-500);
}

.path-course-note {
  display: inline-flex;
  margin-top: 0.5rem;
  font-size: 0.8125rem;
  color: var(--gray-500);
}

.path-course-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
  min-width: 140px;
}

.course-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.course-status.completed {
  color: var(--success);
}

.course-status.in-progress {
  color: var(--olive-600);
}

.course-status.ready {
  color: var(--info, #2563eb);
}

.course-status.locked {
  color: var(--gray-400);
}

.path-detail-info > p {
  margin: 0 0 1rem;
  color: var(--gray-600);
  line-height: 1.6;
}

.path-summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.path-summary-card {
  padding: 0.95rem 1rem;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
}

.path-summary-card label {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.74rem;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.path-summary-card strong {
  font-size: 1rem;
  font-weight: 700;
  color: var(--olive-800);
}

.path-detail-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.path-progress-panel {
  margin-bottom: 1.5rem;
  padding: 1rem 1.1rem;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
}

.path-progress-heading {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--gray-600);
}

.path-progress-next {
  margin-top: 0.9rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.path-progress-next-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--gray-500);
}

.path-course-item.is-complete {
  border-color: rgba(87, 109, 72, 0.2);
  background: rgba(87, 109, 72, 0.06);
}

.path-report-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* ==================== 徽章樣式 ==================== */
.badges-container {
  padding: 1.5rem;
}

.badges-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.badges-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--charcoal);
}

.badges-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--gray-200);
  padding-bottom: 0.5rem;
}

.badge-tab {
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  color: var(--gray-600);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.badge-tab:hover {
  background: var(--gray-100);
  color: var(--olive);
}

.badge-tab.active {
  background: var(--olive-100);
  color: var(--olive-deep);
}

.badges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(248px, 1fr));
  gap: 1.35rem;
}

.badge-card {
  position: relative;
  background:
    radial-gradient(circle at top right, rgba(255,255,255,0.9), transparent 26%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.985) 0%, rgba(248, 245, 239, 0.96) 100%);
  border: 1px solid rgba(26, 58, 92, 0.1);
  border-radius: 24px;
  box-shadow: 0 16px 30px rgba(15, 23, 42, 0.05);
  padding: 1.15rem 1.2rem 1.1rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  cursor: pointer;
  overflow: hidden;
}

.badge-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 42px rgba(15, 23, 42, 0.1);
  border-color: rgba(26, 58, 92, 0.16);
}

.badge-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, rgba(87, 109, 72, 0.92), rgba(26, 58, 92, 0.88));
}

.badge-card.locked {
  opacity: 0.6;
  filter: grayscale(0.5);
}

.badge-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}

.badge-card-body {
  text-align: left;
}

.badge-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  margin-top: 1rem;
  padding-top: 0.9rem;
  border-top: 1px solid rgba(26, 58, 92, 0.08);
}

.badge-card-open {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.56rem 0.88rem;
  border-radius: 999px;
  background: rgba(45, 43, 107, 0.08);
  color: var(--olive-deep);
  font-size: 0.78rem;
  font-weight: 700;
  border: 1px solid rgba(45, 43, 107, 0.08);
}

.badge-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.badge-stat-card {
  position: relative;
  padding: 1.1rem 1.2rem 1rem;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top right, var(--badge-stat-glow, rgba(45, 43, 107, 0.08)), transparent 60%),
    var(--white);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.badge-stat-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--badge-stat-accent, linear-gradient(90deg, var(--olive), var(--olive-light)));
}

.badge-stat-card.tone-olive {
  --badge-stat-accent: linear-gradient(90deg, var(--olive), var(--olive-light));
  --badge-stat-glow: rgba(45, 43, 107, 0.12);
  --badge-stat-value: var(--olive);
  border-color: rgba(45, 43, 107, 0.16);
}

.badge-stat-card.tone-terracotta {
  --badge-stat-accent: linear-gradient(90deg, var(--terracotta), var(--terracotta-light));
  --badge-stat-glow: rgba(26, 107, 74, 0.13);
  --badge-stat-value: var(--terracotta);
  border-color: rgba(26, 107, 74, 0.16);
}

.badge-stat-card.tone-blue {
  --badge-stat-accent: linear-gradient(90deg, var(--blue), #5aa7e8);
  --badge-stat-glow: rgba(43, 108, 176, 0.13);
  --badge-stat-value: var(--blue);
  border-color: rgba(43, 108, 176, 0.16);
}

.badge-stat-card .value {
  position: relative;
  z-index: 1;
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--badge-stat-value, var(--olive));
  line-height: 1.1;
}

.badge-stat-card .label {
  position: relative;
  z-index: 1;
  margin-top: 0.32rem;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--gray-500);
}

.badge-icon {
  width: 78px;
  height: 78px;
  margin: 0;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--olive-100), var(--olive-200));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: 0 16px 28px rgba(15, 23, 42, 0.12);
}

.badge-icon-glyph {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #183153;
}

.badge-icon-glyph svg {
  width: 100%;
  height: 100%;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.badge-icon.tone-olive {
  background: linear-gradient(135deg, #d9e4d0, #b7c9a7);
}

.badge-icon.tone-violet {
  background: linear-gradient(135deg, #ddd6fe, #c4b5fd);
}

.badge-icon.tone-sky {
  background: linear-gradient(135deg, #dbeafe, #bae6fd);
}

.badge-icon.tone-mint {
  background: linear-gradient(135deg, #ccfbf1, #a7f3d0);
}

.badge-icon.tone-gold {
  background: linear-gradient(135deg, #fde68a, #fdba74);
}

.badge-icon.tone-rose {
  background: linear-gradient(135deg, #fbcfe8, #f9a8d4);
}

.badge-detail-icon.tone-olive {
  background: linear-gradient(135deg, #d9e4d0, #b7c9a7);
}

.badge-detail-icon.tone-violet {
  background: linear-gradient(135deg, #ddd6fe, #c4b5fd);
}

.badge-detail-icon.tone-sky {
  background: linear-gradient(135deg, #dbeafe, #bae6fd);
}

.badge-detail-icon.tone-mint {
  background: linear-gradient(135deg, #ccfbf1, #a7f3d0);
}

.badge-detail-icon.tone-gold {
  background: linear-gradient(135deg, #fde68a, #fdba74);
}

.badge-detail-icon.tone-rose {
  background: linear-gradient(135deg, #fbcfe8, #f9a8d4);
}

.badge-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-full);
}

.badge-icon-preview-card {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.85rem 0.95rem;
  margin-bottom: 0.85rem;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(236, 242, 229, 0.72), rgba(255, 255, 255, 0.92));
}

.badge-icon-preview {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--olive-100), var(--olive-200));
}

.badge-icon-preview .badge-icon-glyph {
  width: 34px;
  height: 34px;
}

.badge-icon-preview-label {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--olive-800);
}

.badge-icon.gold {
  background: linear-gradient(135deg, #ffd700, #ffb800);
  box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
}

.badge-icon.silver {
  background: linear-gradient(135deg, #e0e0e0, #c0c0c0);
  box-shadow: 0 4px 15px rgba(192, 192, 192, 0.3);
}

.badge-icon.bronze {
  background: linear-gradient(135deg, #cd7f32, #b87333);
  box-shadow: 0 4px 15px rgba(205, 127, 50, 0.3);
}

.badge-earned-date {
  position: absolute;
  bottom: -4px;
  right: -4px;
  background: var(--success);
  color: white;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  border: 2px solid white;
}

.badge-name {
  font-size: 1.04rem;
  font-weight: 700;
  color: var(--charcoal);
  margin-bottom: 0.42rem;
  line-height: 1.35;
}

.badge-description {
  font-size: 0.85rem;
  color: var(--gray-600);
  margin-bottom: 0.85rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.badge-criteria {
  font-size: 0.78rem;
  color: var(--gray-500);
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.2rem;
}

.badge-progress {
  margin-top: 0.75rem;
}

.badge-status-pill,
.badge-summary-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 600;
}

.badge-status-pill.is-active {
  background: #dcfce7;
  color: #166534;
}

.badge-status-pill.is-draft {
  background: #fef3c7;
  color: #92400e;
}

.badge-summary-pill {
  background: rgba(45, 43, 107, 0.08);
  color: var(--gray-600);
}

.badge-detail-page {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.certificate-workspace {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.certificate-subtitle {
  margin-top: 0.35rem;
  color: var(--gray-600);
  max-width: 720px;
}

.certificate-editor-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(320px, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.certificate-editor-panel,
.certificate-preview-panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.certificate-settings-card {
  background: var(--white);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 24px;
  padding: 1.2rem 1.25rem;
  box-shadow: 0 18px 32px rgba(15, 23, 42, 0.05);
}

.certificate-settings-card h3 {
  margin: 0 0 0.9rem;
  color: var(--charcoal);
}

.certificate-course-switcher {
  min-width: 240px;
}

.certificate-course-switcher label,
.certificate-score-threshold span,
.certificate-section-note,
.certificate-preview-kicker,
.certificate-rule-main small,
.certificate-rule-empty,
.certificate-duration-input span,
.certificate-card-meta span {
  color: var(--gray-500);
}

.certificate-course-switcher label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.certificate-course-switcher select {
  width: 100%;
}

.certificate-preview-card {
  --certificate-accent: #1f4e79;
  --certificate-accent-soft: rgba(31, 78, 121, 0.12);
  --certificate-border: rgba(31, 78, 121, 0.2);
  --certificate-surface: linear-gradient(135deg, #f9fcff 0%, #eef4fb 100%);
  border-radius: 18px;
  padding: 1.1rem 1.2rem;
  background: var(--certificate-surface);
  border: 1px solid var(--certificate-border);
  box-shadow: inset 0 0 0 3px var(--certificate-accent-soft);
}

.certificate-preview-kicker {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--certificate-accent);
}

.certificate-preview-title {
  margin-top: 0.7rem;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--certificate-accent);
  line-height: 1.25;
}

.certificate-preview-subtitle {
  margin-top: 0.35rem;
  font-size: 0.96rem;
  color: var(--gray-600);
}

.certificate-preview-statement {
  margin-top: 1rem;
  line-height: 1.7;
  color: var(--gray-700);
}

.certificate-preview-signature {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-end;
  margin-top: 1.3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--certificate-border);
  flex-wrap: wrap;
}

.certificate-preview-signature > * {
  min-width: 0;
  flex: 1 1 auto;
}

.certificate-preview-signature strong,
.certificate-card-meta strong {
  display: block;
  color: var(--charcoal);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.certificate-preview-signature span,
.certificate-preview-course {
  display: block;
  font-size: 0.85rem;
  overflow: hidden;
  text-overflow: ellipsis;
}

.certificate-preview-course {
  text-align: right;
  font-weight: 500;
  color: var(--gray-700);
}

.certificate-rule-section + .certificate-rule-section {
  margin-top: 1.2rem;
}

.certificate-rule-section h4 {
  margin: 0 0 0.65rem;
  color: var(--charcoal);
}

.certificate-rule-list,
.certificate-score-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.certificate-rule-item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.85rem 0.95rem;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 16px;
  background: rgba(248, 250, 252, 0.9);
}

.certificate-rule-main {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.certificate-score-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.85rem;
  align-items: center;
}

.certificate-score-threshold {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 132px;
}

.certificate-score-threshold input,
.certificate-duration-input input {
  width: 100%;
}

.certificate-duration-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.certificate-duration-input {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.certificate-actions {
  display: flex;
  justify-content: flex-end;
}

.certificate-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
  gap: 1.25rem;
}

.certificate-card {
  background: var(--white);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 22px;
  padding: 1.25rem;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.06);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.certificate-card-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  flex-wrap: nowrap;
}

.certificate-card-meta-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  flex: 1 1 auto;
}

.certificate-card-meta-info strong {
  font-size: 1rem;
  line-height: 1.3;
  color: var(--charcoal);
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.certificate-card-meta-info span {
  font-size: 0.85rem;
  color: var(--gray-500);
}

.certificate-card .btn-sm {
  flex: 0 0 auto;
  white-space: nowrap;
  padding: 0.55rem 1rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.88rem;
}

.certificate-card .certificate-name-hint {
  margin: 0;
  padding-top: 0.65rem;
  border-top: 1px solid rgba(15, 23, 42, 0.06);
  font-size: 11px;
  color: var(--gray-500);
  line-height: 1.5;
}

.badge-detail-header-row {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--gray-200);
}

.badge-detail-main {
  flex: 1;
  min-width: 0;
}

.badge-summary-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.badge-detail-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: stretch;
}

.badge-criteria-panel,
.badge-recipients-section {
  padding: 1rem 1.1rem;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
}

.badge-criteria-panel h4,
.badge-recipients-section h3 {
  margin: 0 0 0.75rem;
  color: var(--olive-800);
}

.badge-criteria-panel ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--gray-600);
}

.badge-table-shell {
  overflow-x: auto;
}

.section-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.table-action-cell {
  text-align: center;
}

/* 徽章詳情模態框 */
.badge-detail-modal {
  text-align: center;
}

.badge-detail-icon {
  width: 120px;
  height: 120px;
  margin: 0 auto 1.5rem;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.badge-detail-icon .badge-icon-glyph {
  width: 58px;
  height: 58px;
}

.badge-detail-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--olive-800);
  margin-bottom: 0.75rem;
}

.badge-detail-description {
  color: var(--gray-600);
  margin-bottom: 1.5rem;
}

.badge-detail-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
  text-align: left;
}

.badge-info-item {
  padding: 1rem;
  background: var(--gray-50);
  border-radius: var(--radius-md);
}

.badge-info-item label {
  font-size: 0.75rem;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 0.25rem;
}

.badge-info-item span {
  font-weight: 600;
  color: var(--olive-800);
}

/* ==================== 評分標準樣式 ==================== */
.rubrics-container {
  padding: 1.5rem;
}

.rubrics-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.rubrics-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--olive-800);
}

.rubrics-toolbar {
  display: flex;
  gap: 0.75rem;
}

.rubrics-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.rubric-card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  width: 100%;
  appearance: none;
  text-align: left;
  color: inherit;
  font: inherit;
  transition: box-shadow var(--transition-base);
}

.rubric-card:hover {
  box-shadow: var(--shadow-lg);
}

.rubric-card:focus-visible {
  outline: 3px solid rgba(74, 93, 35, 0.22);
  outline-offset: 3px;
}

.rubric-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 1.25rem;
  border-bottom: 1px solid var(--gray-100);
}

.rubric-info h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--olive-800);
  margin-bottom: 0.375rem;
}

.rubric-info p {
  font-size: 0.875rem;
  color: var(--gray-500);
}

.rubric-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8125rem;
  color: var(--gray-500);
  margin-top: 0.5rem;
}

.rubric-meta span {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.rubric-actions {
  display: flex;
  gap: 0.5rem;
}

.rubric-preview {
  padding: 1.25rem;
  background: var(--gray-50);
}

.rubric-criteria-preview {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--gray-600);
  font-size: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.rubric-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.rubric-table th,
.rubric-table td {
  padding: 0.875rem;
  text-align: left;
  border: 1px solid var(--gray-200);
}

.rubric-table th {
  background: var(--olive-50);
  font-weight: 600;
  color: var(--olive-800);
}

.rubric-table th.criterion-header {
  width: 200px;
  background: var(--olive-100);
}

.rubric-table td.level-cell {
  vertical-align: top;
  transition: background var(--transition-fast);
}

.rubric-table td.level-cell:hover {
  background: var(--olive-50);
}

.rubric-table td.level-cell.selected {
  background: var(--olive-100);
  border-color: var(--olive-500);
}

.rubric-level-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.rubric-level-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.22rem 0.55rem;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--gray-700);
}

.level-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.level-name {
  font-weight: 600;
  color: var(--olive-700);
}

.level-points {
  background: var(--olive-500);
  color: white;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.level-description {
  font-size: 0.8125rem;
  color: var(--gray-600);
  line-height: 1.5;
}

.criterion-name {
  font-weight: 600;
  color: var(--olive-800);
  margin-bottom: 0.25rem;
}

.criterion-description {
  font-size: 0.8125rem;
  color: var(--gray-500);
}

/* 建立評分標準模態框 */
.rubric-builder {
  max-height: 70vh;
  overflow-y: auto;
}

.rubric-form-group {
  margin-bottom: 1.5rem;
}

.rubric-form-group label {
  display: block;
  font-weight: 600;
  color: var(--olive-800);
  margin-bottom: 0.5rem;
}

.rubric-form-group input,
.rubric-form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
}

.rubric-form-group input:focus,
.rubric-form-group textarea:focus {
  outline: none;
  border-color: var(--olive-500);
  box-shadow: 0 0 0 3px var(--olive-100);
}

.criteria-builder {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 1rem;
  background: var(--gray-50);
}

.criteria-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.criterion-item {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.criterion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.criterion-header input {
  flex: 1;
  margin-right: 1rem;
  padding: 0.5rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
}

.levels-list {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.level-item {
  flex: 1;
  min-width: 150px;
  padding: 0.75rem;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
}

.level-item input[type="text"],
.level-item input[type="number"] {
  width: 100%;
  padding: 0.375rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  margin-bottom: 0.375rem;
  font-size: 0.875rem;
}

.level-item textarea {
  width: 100%;
  padding: 0.375rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  resize: vertical;
  min-height: 60px;
}

.add-level-btn,
.add-criterion-btn {
  margin-top: 0.75rem;
  padding: 0.5rem 1rem;
  background: var(--olive-100);
  color: var(--olive-700);
  border: 1px dashed var(--olive-400);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.add-level-btn:hover,
.add-criterion-btn:hover {
  background: var(--olive-200);
  border-style: solid;
}

/* 範本庫樣式 */
.template-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.template-card {
  background: white;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  cursor: pointer;
  transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base), opacity var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.template-card:hover {
  border-color: var(--olive-400);
  box-shadow: var(--shadow-md);
}

.template-card.selected {
  border-color: var(--olive-500);
  background: var(--olive-50);
}

.template-icon {
  width: 48px;
  height: 48px;
  background: var(--olive-100);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.template-name {
  font-weight: 600;
  color: var(--olive-800);
  margin-bottom: 0.375rem;
}

.template-description {
  font-size: 0.8125rem;
  color: var(--gray-500);
}

/* ==================== 課程群組管理 ==================== */

.groups-manager-container {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 2rem;
}

.groups-manager-container .page-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.groups-manager-container .page-header h1 {
  margin: 0;
  font-size: 1.5rem;
  color: var(--olive-800);
}

.btn-back {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--gray-100);
  border: none;
  border-radius: var(--radius-md);
  color: var(--gray-600);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-back:hover {
  background: var(--gray-200);
  color: var(--olive-700);
}

/* 群組模式選擇器 */
.group-mode-selector {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.group-mode-selector label {
  font-weight: 600;
  color: var(--olive-700);
  margin-right: 0.75rem;
}

.group-mode-selector select {
  padding: 0.72rem 3rem 0.72rem 1rem;
  border: 1px solid rgba(26, 58, 92, 0.14);
  border-radius: 16px;
  font-size: 0.9375rem;
  background-image:
    linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(248, 244, 236, 0.9) 100%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6.5L8 10.5L12 6.5' stroke='%231a3a5c' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat, no-repeat;
  background-position: 0 0, calc(100% - 1rem) 50%;
  background-size: 100% 100%, 14px 14px;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.84),
    0 12px 24px rgba(15, 23, 42, 0.05);
  cursor: pointer;
}

.group-mode-selector select:focus {
  outline: none;
  border-color: var(--olive);
  background-image:
    linear-gradient(180deg, rgba(255,255,255,1) 0%, rgba(249, 246, 240, 0.98) 100%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6.5L8 10.5L12 6.5' stroke='%234a5d23' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.88),
    0 0 0 4px rgba(168, 184, 154, 0.14),
    0 16px 30px rgba(15, 23, 42, 0.08);
}

.mode-description {
  margin: 0.75rem 0;
  font-size: 0.875rem;
  color: var(--gray-500);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 400 !important;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--olive-500);
}

/* 群組統計卡片 */
.groups-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.groups-stats .stat-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  text-align: center;
}

.groups-stats .stat-card.warning {
  border-color: var(--terracotta-300);
  background: var(--terracotta-50);
}

.groups-stats .stat-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--olive-700);
  line-height: 1.2;
}

.groups-stats .stat-card.warning .stat-value {
  color: var(--terracotta-600);
}

.groups-stats .stat-label {
  display: block;
  font-size: 0.8125rem;
  color: var(--gray-500);
  margin-top: 0.25rem;
}

/* 群組操作按鈕 */
.groups-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.groups-actions button {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* 群組列表 */
.groups-list {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.groups-list h3 {
  margin: 0 0 1rem 0;
  font-size: 1.125rem;
  color: var(--olive-800);
}

.groups-list .empty-state {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--gray-400);
}

.groups-list .empty-state svg {
  opacity: 0.5;
  margin-bottom: 1rem;
}

.group-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.group-card:hover {
  border-color: var(--olive-300);
  box-shadow: var(--shadow-sm);
}

.group-card:last-child {
  margin-bottom: 0;
}

.group-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.group-header h4 {
  margin: 0;
  font-size: 1rem;
  color: var(--olive-800);
}

.group-header .member-count {
  font-size: 0.8125rem;
  color: var(--gray-500);
  background: var(--gray-100);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
}

.group-description {
  font-size: 0.875rem;
  color: var(--gray-600);
  margin: 0 0 0.75rem 0;
}

.group-members {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.group-members .member-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--olive-200);
  color: var(--olive-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  border: 2px solid white;
  margin-right: -8px;
}

.group-members .more-members {
  font-size: 0.75rem;
  color: var(--gray-500);
  margin-left: 0.5rem;
}

.group-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  background: white;
  color: var(--gray-600);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-sm:hover {
  background: var(--gray-50);
  border-color: var(--gray-400);
}

.btn-sm.btn-danger {
  background: linear-gradient(180deg, rgba(255, 248, 244, 0.98) 0%, rgba(255, 238, 232, 0.95) 100%);
  color: #9f4434;
  border-color: rgba(191, 90, 67, 0.18);
  box-shadow: 0 10px 18px rgba(191, 90, 67, 0.12);
  font-weight: 700;
}

.btn-sm.btn-danger:hover {
  background: linear-gradient(180deg, rgba(255, 243, 238, 1) 0%, rgba(255, 229, 220, 0.98) 100%);
  color: #863324;
  border-color: rgba(191, 90, 67, 0.26);
  box-shadow: 0 12px 22px rgba(191, 90, 67, 0.16);
  transform: translateY(-1px);
}

.btn-sm.btn-danger:active {
  transform: translateY(0);
  box-shadow: 0 6px 12px rgba(191, 90, 67, 0.14);
}

.btn-sm.btn-primary {
  background: var(--olive-500);
  border-color: var(--olive-500);
  color: white;
}

.btn-sm.btn-primary:hover {
  background: var(--olive-600);
  border-color: var(--olive-600);
}

/* 未分組學生 */
.ungrouped-students {
  background: var(--terracotta-50);
  border: 1px solid var(--terracotta-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.ungrouped-students h3 {
  margin: 0 0 1rem 0;
  color: var(--terracotta-700);
  font-size: 1.125rem;
}

.ungrouped-list {
  display: grid;
  gap: 0.75rem;
}

.ungrouped-student {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: white;
  border-radius: var(--radius-md);
  border: 1px solid var(--terracotta-200);
}

.student-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--olive-200);
  color: var(--olive-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.student-info {
  flex: 1;
  min-width: 0;
}

.student-name {
  display: block;
  font-weight: 500;
  color: var(--gray-800);
}

.student-email {
  display: block;
  font-size: 0.8125rem;
  color: var(--gray-500);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 模態框內的成員列表 */
.members-section h3,
.add-members-section h3 {
  font-size: 1rem;
  color: var(--olive-700);
  margin: 0 0 1rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--gray-200);
}

.members-list {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.member-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--gray-50);
  border-radius: var(--radius-md);
}

.member-item .member-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--olive-200);
  color: var(--olive-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.875rem;
}

.member-item .member-info {
  flex: 1;
  min-width: 0;
}

.member-item .member-name {
  display: block;
  font-weight: 500;
  color: var(--gray-800);
}

.member-item .member-email {
  display: block;
  font-size: 0.75rem;
  color: var(--gray-500);
}

.add-members-section {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-200);
}

.hint-text {
  font-size: 0.8125rem;
  color: var(--gray-500);
  margin-bottom: 1rem;
}

.available-students {
  display: grid;
  gap: 0.5rem;
  max-height: 200px;
  overflow-y: auto;
  margin-bottom: 1rem;
  padding: 0.5rem;
  background: var(--gray-50);
  border-radius: var(--radius-md);
}

.student-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
}

.student-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--olive-500);
}

.student-item label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  flex: 1;
}

.student-item .student-avatar {
  width: 28px;
  height: 28px;
  font-size: 0.75rem;
}

/* 群組選擇列表 */
.group-select-list {
  display: grid;
  gap: 0.5rem;
  margin-top: 1rem;
}

.group-select-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.group-select-item:hover {
  border-color: var(--olive-400);
  background: var(--olive-50);
}

.group-select-item .group-name {
  font-weight: 500;
  color: var(--olive-800);
}

.group-select-item .member-count {
  font-size: 0.8125rem;
  color: var(--gray-500);
}

/* 我的群組卡片 */
.my-group-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.my-group-card h4 {
  margin: 0 0 0.5rem 0;
  color: var(--olive-800);
}

.my-group-card p {
  font-size: 0.875rem;
  color: var(--gray-600);
  margin: 0 0 0.75rem 0;
}

.my-group-card .group-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8125rem;
  color: var(--gray-500);
  margin-bottom: 0.75rem;
}

/* 成員列表視圖 */
.members-list-view {
  display: grid;
  gap: 0.5rem;
}

.member-list-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--gray-50);
  border-radius: var(--radius-md);
}

.member-list-item .member-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--olive-200);
  color: var(--olive-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex: 0 0 auto;
}

.member-list-item .member-details {
  flex: 1;
}

.member-list-item .member-name {
  display: block;
  font-weight: 500;
  color: var(--gray-800);
}

.member-list-item .member-role {
  display: block;
  font-size: 0.75rem;
  color: var(--gray-500);
}

.empty-text {
  text-align: center;
  padding: 2rem;
  color: var(--gray-400);
}

.info-text {
  background: var(--cream-100);
  border: 1px solid var(--cream-300);
  border-radius: var(--radius-md);
  padding: 1rem;
  font-size: 0.875rem;
  color: var(--gray-600);
  margin-bottom: 1rem;
}

/* 群組面板樣式 */
.groups-panel-content {
  padding: 1.5rem;
}

.groups-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.groups-panel-header h3 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--olive-800);
}

.groups-panel-mode {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--gray-50);
  border-radius: var(--radius-md);
}

.groups-panel-mode label {
  font-weight: 500;
  color: var(--gray-600);
}

.mode-badge {
  padding: 0.25rem 0.75rem;
  background: var(--olive-100);
  color: var(--olive-700);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 500;
}

.forced-badge {
  padding: 0.25rem 0.5rem;
  background: var(--terracotta-100);
  color: var(--terracotta-700);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

.groups-panel-stats {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.groups-panel-stats .stat-item {
  flex: 1;
  text-align: center;
  padding: 1rem;
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
}

.groups-panel-stats .stat-item.warning {
  background: var(--terracotta-50);
  border-color: var(--terracotta-200);
}

.groups-panel-stats .stat-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--olive-700);
}

.groups-panel-stats .stat-item.warning .stat-value {
  color: var(--terracotta-600);
}

.groups-panel-stats .stat-label {
  font-size: 0.75rem;
  color: var(--gray-500);
}

.empty-groups {
  text-align: center;
  padding: 2rem;
  background: var(--gray-50);
  border-radius: var(--radius-lg);
}

.empty-groups p {
  color: var(--gray-500);
  margin-bottom: 1rem;
}

.groups-preview-list {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.group-preview-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--gray-100);
}

.group-preview-item:last-child {
  border-bottom: none;
}

.group-preview-item .group-name {
  font-weight: 500;
  color: var(--olive-800);
}

.group-preview-item .group-count {
  font-size: 0.8125rem;
  color: var(--gray-500);
  background: var(--gray-100);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
}

.more-text {
  padding: 0.75rem 1rem;
  font-size: 0.8125rem;
  color: var(--gray-500);
  text-align: center;
  margin: 0;
  background: var(--gray-50);
}

/* ==================== 響應式調整 ==================== */
@media (max-width: 768px) {
  .learning-paths-grid,
  .badges-grid {
    grid-template-columns: 1fr;
  }

  .badge-stats-grid,
  .path-summary-grid,
  .path-report-grid {
    grid-template-columns: 1fr;
  }

  .path-detail-header {
    flex-direction: column;
  }

  .path-detail-image {
    width: 100%;
    height: 200px;
  }

  .path-course-item {
    align-items: flex-start;
    flex-direction: column;
  }

  .path-course-actions {
    width: 100%;
    align-items: stretch;
    min-width: 0;
  }

  .badge-detail-info {
    grid-template-columns: 1fr;
  }

  .badge-detail-header-row,
  #moodleCalendarView .calendar-day-event-main {
    flex-direction: column;
    align-items: flex-start;
  }

  #moodleCalendarView .calendar-day-modal-hero {
    grid-template-columns: 1fr;
  }

  #moodleCalendarView .calendar-day-event-time {
    min-width: 0;
  }

  #calendarDayEventsModal .calendar-day-modal-hero {
    grid-template-columns: 1fr;
    padding: 0.95rem;
  }

  .calendar-day-modal-hero {
    grid-template-columns: 1fr;
    padding: 0.95rem;
  }

  #calendarDayEventsModal .calendar-day-modal-date-card {
    min-width: 0;
    width: 100%;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  #calendarDayEventsModal .calendar-day-event-main {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  #calendarDayEventsModal .calendar-day-event-time {
    min-width: 0;
    width: fit-content;
  }

  .calendar-day-event-list {
    grid-template-columns: 1fr;
  }

  .badge-detail-actions,
  .path-detail-actions {
    width: 100%;
  }

  .rubric-table {
    display: block;
    overflow-x: auto;
  }

  .levels-list {
    flex-direction: column;
  }

  .level-item {
    min-width: 100%;
  }

  .template-grid {
    grid-template-columns: 1fr;
  }

  /* 群組管理響應式 */
  .groups-manager-container {
    padding: 1rem;
  }

  .groups-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .groups-actions {
    flex-direction: column;
  }

  .groups-actions button {
    width: 100%;
    justify-content: center;
  }

  .group-actions {
    justify-content: flex-start;
  }

  .ungrouped-student {
    flex-wrap: wrap;
  }

  .ungrouped-student .student-info {
    flex: 1 1 calc(100% - 52px);
  }

  .ungrouped-student button {
    width: 100%;
    justify-content: center;
  }
}

/* ==================== 防作弊系統樣式 ==================== */

/* 防作弊設定 Modal */
.anti-cheat-settings-modal {
  max-width: 600px;
}

.anti-cheat-settings-modal .modal-body {
  max-height: 70vh;
  overflow-y: auto;
}

.anti-cheat-section {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--gray-200);
}

.anti-cheat-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.anti-cheat-section h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--olive-dark);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.anti-cheat-toggle {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 0.75rem;
  background: var(--gray-50);
  border-radius: var(--radius-md);
}

.anti-cheat-toggle:last-child {
  margin-bottom: 0;
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--gray-300);
  transition: var(--transition-base);
  border-radius: 24px;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: var(--transition-base);
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
}

.toggle-switch input:checked + .toggle-slider {
  background-color: var(--olive-base);
}

.toggle-switch input:checked + .toggle-slider:before {
  transform: translateX(20px);
}

.toggle-info {
  flex: 1;
}

.toggle-label {
  display: block;
  font-weight: 500;
  color: var(--gray-800);
  margin-bottom: 0.25rem;
}

.toggle-desc {
  display: block;
  font-size: 0.8125rem;
  color: var(--gray-500);
  line-height: 1.4;
}

/* 防作弊警告 Toast */
.anti-cheat-warning {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--terracotta-dark);
  color: white;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  z-index: 10000;
  box-shadow: var(--shadow-lg);
  animation: slideInFromTop 0.3s ease-out;
}

.anti-cheat-warning svg {
  flex-shrink: 0;
}

@keyframes slideInFromTop {
  from {
    transform: translate(-50%, -100%);
    opacity: 0;
  }
  to {
    transform: translate(-50%, 0);
    opacity: 1;
  }
}

/* 視訊監控預覽 */
.webcam-preview {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 200px;
  background: black;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
}

.webcam-preview video {
  width: 100%;
  height: auto;
  display: block;
}

.webcam-status {
  position: absolute;
  top: 8px;
  left: 8px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.webcam-dot {
  width: 8px;
  height: 8px;
  background: var(--danger);
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* 監控報告 Modal */
.proctoring-report-modal {
  max-width: 700px;
}

.proctoring-report-modal .modal-body {
  max-height: 70vh;
  overflow-y: auto;
}

.proctoring-summary {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--gray-50);
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.risk-badge {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.875rem;
}

.risk-badge.risk-high {
  background: #fef2f2;
  color: var(--danger);
  border: 1px solid #fecaca;
}

.risk-badge.risk-medium {
  background: #fffbeb;
  color: #d97706;
  border: 1px solid #fde68a;
}

.risk-badge.risk-low {
  background: #f0fdf4;
  color: var(--success);
  border: 1px solid #bbf7d0;
}

.suspicious-score {
  font-size: 0.9375rem;
  color: var(--gray-600);
}

.suspicious-score strong {
  color: var(--gray-800);
  font-size: 1.125rem;
}

.proctoring-stats {
  margin-bottom: 1.5rem;
}

.proctoring-stats h4,
.proctoring-flags h4,
.proctoring-screenshots h4,
.proctoring-events h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 0.75rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.stat-item {
  background: var(--gray-50);
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  text-align: center;
}

.stat-item .stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--gray-500);
  margin-bottom: 0.25rem;
}

.stat-item .stat-value {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--gray-800);
}

.proctoring-flags {
  margin-bottom: 1.5rem;
}

.proctoring-flags ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.flag-item {
  padding: 0.5rem 0.75rem;
  background: #fef2f2;
  color: var(--danger);
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.flag-item::before {
  content: "⚠";
}

.proctoring-screenshots {
  margin-bottom: 1.5rem;
}

.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.screenshot-item {
  position: relative;
  cursor: pointer;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.screenshot-item img {
  width: 100%;
  height: 80px;
  object-fit: cover;
  transition: var(--transition-fast);
}

.screenshot-item:hover img {
  transform: scale(1.05);
}

.screenshot-time {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  font-size: 0.6875rem;
  padding: 0.25rem;
  text-align: center;
}

.more-screenshots {
  font-size: 0.8125rem;
  color: var(--gray-500);
  text-align: center;
  margin-top: 0.5rem;
}

.proctoring-events {
  margin-bottom: 1rem;
}

.events-timeline {
  border-left: 2px solid var(--gray-200);
  padding-left: 1rem;
}

.event-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.375rem 0;
  font-size: 0.8125rem;
  position: relative;
}

.event-item::before {
  content: "";
  position: absolute;
  left: -1.25rem;
  width: 8px;
  height: 8px;
  background: var(--olive-base);
  border-radius: 50%;
}

.event-time {
  color: var(--gray-500);
  font-family: monospace;
  font-size: 0.75rem;
}

.event-type {
  color: var(--gray-700);
}

/* 監控摘要 Modal */
.proctoring-summary-modal .modal-body {
  max-height: 70vh;
  overflow-y: auto;
}

.summary-overview {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.summary-stat {
  text-align: center;
  padding: 1rem;
  background: var(--gray-50);
  border-radius: var(--radius-md);
}

.summary-stat .stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--olive-dark);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.summary-stat .stat-label {
  font-size: 0.8125rem;
  color: var(--gray-500);
}

.summary-stat.risk-high {
  background: #fef2f2;
}

.summary-stat.risk-high .stat-number {
  color: var(--danger);
}

.summary-stat.risk-medium {
  background: #fffbeb;
}

.summary-stat.risk-medium .stat-number {
  color: #d97706;
}

.summary-stat.risk-low {
  background: #f0fdf4;
}

.summary-stat.risk-low .stat-number {
  color: var(--success);
}

.proctoring-table {
  width: 100%;
}

.proctoring-table .risk-badge {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
}

/* 截圖查看 */
.screenshot-view {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

/* 響應式 */
@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .screenshots-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .summary-overview {
    grid-template-columns: repeat(2, 1fr);
  }

  .webcam-preview {
    width: 150px;
    bottom: 10px;
    right: 10px;
  }

  .proctoring-summary-modal {
    max-width: 100%;
  }

  .attempts-table-container {
    overflow-x: auto;
  }
}

/* ==================== 學習進度樣式 ==================== */

.learning-progress-shell,
.learning-progress-detail {
  padding: 1.5rem;
}

.learning-progress-hero,
.learning-progress-detail-hero {
  background:
    radial-gradient(circle at top right, rgba(111, 127, 93, 0.16), transparent 34%),
    linear-gradient(135deg, rgba(248, 250, 245, 0.98), rgba(240, 244, 236, 0.96));
  border: 1px solid rgba(111, 127, 93, 0.16);
  border-radius: 24px;
  padding: 1.5rem;
  box-shadow: 0 20px 40px rgba(37, 45, 33, 0.08);
}

.learning-progress-hero {
  margin-bottom: 1.5rem;
}

.learning-progress-detail-hero {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.learning-progress-hero-copy h2,
.learning-progress-detail-copy h2 {
  margin: 0.4rem 0 0.75rem;
  font-size: 2rem;
  line-height: 1.1;
  color: var(--olive-800);
}

.learning-progress-hero-copy p,
.learning-progress-detail-copy p {
  margin: 0;
  max-width: 760px;
  color: var(--gray-600);
  line-height: 1.7;
}

.learning-progress-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: rgba(87, 109, 72, 0.12);
  color: var(--olive-700);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.learning-progress-note {
  margin-top: 0.95rem;
  padding: 0.85rem 1rem;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--gray-600);
  font-size: 0.9rem;
  line-height: 1.6;
}

.learning-progress-summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 1.25rem;
}

.learning-progress-summary-card {
  padding: 1rem 1.05rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(148, 163, 184, 0.18);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.75);
}

.learning-progress-summary-card label,
.learning-progress-metric label,
.learning-progress-activity-stat label {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--gray-500);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.learning-progress-summary-card strong,
.learning-progress-metric strong,
.learning-progress-activity-stat strong {
  display: block;
  font-size: 1.05rem;
  color: var(--olive-800);
  font-weight: 700;
}

.learning-progress-course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1rem;
}

.learning-progress-course-card {
  background: white;
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 22px;
  padding: 1.2rem;
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.05);
}

.learning-progress-course-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.learning-progress-course-title {
  font-size: 1.16rem;
  font-weight: 700;
  color: var(--olive-800);
}

.learning-progress-course-desc {
  margin: 0.45rem 0 0;
  color: var(--gray-600);
  font-size: 0.92rem;
  line-height: 1.65;
}

.learning-progress-status-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  white-space: nowrap;
}

.learning-progress-status-chip.completed {
  background: rgba(16, 185, 129, 0.14);
  color: #047857;
}

.learning-progress-status-chip.in-progress {
  background: rgba(87, 109, 72, 0.14);
  color: var(--olive-700);
}

.learning-progress-status-chip.not-started {
  background: rgba(148, 163, 184, 0.16);
  color: var(--gray-500);
}

.learning-progress-course-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-bottom: 1rem;
}

.learning-progress-metric {
  padding: 0.9rem 0.95rem;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(248, 250, 245, 0.92), rgba(243, 246, 239, 0.92));
  border: 1px solid rgba(111, 127, 93, 0.1);
}

.learning-progress-course-bar,
.learning-progress-detail-progress {
  margin-bottom: 1rem;
}

.learning-progress-course-actions,
.learning-progress-detail-actions,
.learning-progress-activity-actions {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.learning-progress-detail-actions {
  justify-content: flex-end;
}

.learning-progress-section-list {
  margin-top: 1.4rem;
}

.learning-progress-section-heading {
  margin-bottom: 1rem;
}

.learning-progress-section-heading h3 {
  margin: 0;
  font-size: 1.3rem;
  color: var(--olive-800);
}

.learning-progress-section {
  background: white;
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 22px;
  padding: 1.15rem;
  margin-bottom: 1rem;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.04);
}

.learning-progress-section-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.learning-progress-section-head h4 {
  margin: 0;
  font-size: 1.08rem;
  color: var(--olive-800);
}

.learning-progress-section-head p {
  margin: 0.4rem 0 0;
  color: var(--gray-600);
  line-height: 1.6;
}

.learning-progress-section-count {
  min-width: 40px;
  height: 40px;
  border-radius: 14px;
  background: rgba(87, 109, 72, 0.12);
  color: var(--olive-700);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.learning-progress-activity-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.learning-progress-activity-row {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(248, 250, 245, 0.95), rgba(244, 246, 241, 0.9));
  border: 1px solid rgba(111, 127, 93, 0.08);
}

.learning-progress-activity-main {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
}

.learning-progress-activity-seq {
  min-width: 48px;
  height: 48px;
  border-radius: 16px;
  background: rgba(87, 109, 72, 0.12);
  color: var(--olive-700);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.learning-progress-activity-copy h5 {
  margin: 0.35rem 0 0;
  font-size: 1rem;
  color: var(--olive-800);
}

.learning-progress-activity-copy p {
  margin: 0.4rem 0 0;
  color: var(--gray-600);
  font-size: 0.9rem;
  line-height: 1.6;
}

.learning-progress-activity-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.learning-progress-type-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.1);
  color: #1d4ed8;
  font-size: 0.76rem;
  font-weight: 700;
}

.learning-progress-activity-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.learning-progress-activity-stat {
  padding: 0.85rem 0.9rem;
  border-radius: 16px;
  background: white;
  border: 1px solid rgba(148, 163, 184, 0.12);
}

.learning-progress-activity-stat small {
  display: block;
  margin-top: 0.35rem;
  color: var(--gray-500);
  line-height: 1.5;
}

@media (max-width: 1100px) {
  .learning-progress-summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .learning-progress-activity-row {
    grid-template-columns: 1fr;
  }

  .learning-progress-detail-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 768px) {
  .learning-progress-shell,
  .learning-progress-detail {
    padding: 1rem;
  }

  .learning-progress-hero,
  .learning-progress-detail-hero,
  .learning-progress-section,
  .learning-progress-course-card {
    padding: 1rem;
    border-radius: 18px;
  }

  .learning-progress-detail-hero,
  .learning-progress-course-head,
  .learning-progress-section-head {
    flex-direction: column;
  }

  .learning-progress-summary-grid,
  .learning-progress-course-metrics,
  .learning-progress-activity-stats {
    grid-template-columns: 1fr;
  }

  .learning-progress-activity-main {
    flex-direction: column;
  }

  .learning-progress-activity-seq {
    min-width: 44px;
    height: 44px;
  }
}

/* ==================== 審計日誌樣式 ==================== */

.audit-logs-page {
  padding: 1.5rem;
}

.audit-logs-page .page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.audit-logs-page .page-header h1 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  color: var(--olive-dark);
  margin: 0;
}

.audit-logs-page .header-actions {
  display: flex;
  gap: 0.75rem;
}

.audit-filters {
  background: white;
  padding: 1rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.audit-filters .filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
}

.audit-filters .filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.audit-filters .filter-group label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--gray-600);
  text-transform: uppercase;
}

.audit-filters .filter-group select,
.audit-filters .filter-group input {
  min-width: 140px;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}

.audit-logs-container {
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.audit-table {
  width: 100%;
  border-collapse: collapse;
}

.audit-table th {
  background: var(--gray-50);
  padding: 0.75rem 1rem;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--gray-600);
  text-transform: uppercase;
  border-bottom: 1px solid var(--gray-200);
}

.audit-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--gray-100);
  font-size: 0.875rem;
  color: var(--gray-700);
}

.audit-table tr:hover {
  background: var(--gray-50);
}

.audit-table tr.severity-warning {
  background: rgba(251, 191, 36, 0.05);
}

.audit-table tr.severity-error {
  background: rgba(239, 68, 68, 0.05);
}

.audit-table tr.severity-critical {
  background: rgba(185, 28, 28, 0.08);
}

.log-time {
  font-family: monospace;
  font-size: 0.8125rem;
  color: var(--gray-500);
  white-space: nowrap;
}

.log-user {
  display: flex;
  flex-direction: column;
}

.log-user .user-name {
  font-weight: 500;
  color: var(--gray-800);
}

.log-user .user-email {
  font-size: 0.75rem;
  color: var(--gray-500);
}

.event-badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
}

.event-badge.category-user {
  background: #dbeafe;
  color: #1e40af;
}

.event-badge.category-course {
  background: #dcfce7;
  color: #166534;
}

.event-badge.category-assignment {
  background: #fef3c7;
  color: #92400e;
}

.event-badge.category-quiz {
  background: #e0e7ff;
  color: #3730a3;
}

.event-badge.category-grade {
  background: #fce7f3;
  color: #9d174d;
}

.event-badge.category-file {
  background: #f3e8ff;
  color: #6b21a8;
}

.event-badge.category-security {
  background: #fef2f2;
  color: var(--danger);
}

.event-badge.category-system {
  background: var(--gray-100);
  color: var(--gray-600);
}

.severity-badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
}

.severity-badge.info {
  background: #e0f2fe;
  color: #0369a1;
}

.severity-badge.warning {
  background: #fef3c7;
  color: #d97706;
}

.severity-badge.error {
  background: #fef2f2;
  color: var(--danger);
}

.severity-badge.critical {
  background: #7f1d1d;
  color: white;
}

.log-desc {
  max-width: 250px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.log-ip {
  font-family: monospace;
  font-size: 0.8125rem;
  color: var(--gray-500);
}

.load-more {
  padding: 1rem;
  text-align: center;
  background: var(--gray-50);
}

.search-results-info {
  padding: 0.75rem 1rem;
  background: var(--olive-light);
  color: var(--olive-dark);
  font-size: 0.875rem;
}

/* 審計統計 Modal */
.audit-stats-modal .modal-body {
  max-height: 70vh;
  overflow-y: auto;
}

.audit-stats-modal .stats-overview {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.audit-stats-modal .stat-card {
  text-align: center;
  padding: 1rem;
  background: var(--gray-50);
  border-radius: var(--radius-md);
}

.audit-stats-modal .stat-card .stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--olive-dark);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.audit-stats-modal .stat-card .stat-label {
  font-size: 0.8125rem;
  color: var(--gray-500);
}

.audit-stats-modal .stat-card.severity-info {
  background: #e0f2fe;
}

.audit-stats-modal .stat-card.severity-info .stat-number {
  color: #0369a1;
}

.audit-stats-modal .stat-card.severity-warning {
  background: #fef3c7;
}

.audit-stats-modal .stat-card.severity-warning .stat-number {
  color: #d97706;
}

.audit-stats-modal .stat-card.severity-error {
  background: #fef2f2;
}

.audit-stats-modal .stat-card.severity-error .stat-number {
  color: var(--danger);
}

.audit-stats-modal .stat-card.severity-critical {
  background: #7f1d1d;
}

.audit-stats-modal .stat-card.severity-critical .stat-number,
.audit-stats-modal .stat-card.severity-critical .stat-label {
  color: white;
}

.stats-sections {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.stats-section h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 0.75rem;
}

.top-events .event-row,
.top-users .user-row {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--gray-100);
}

.top-events .event-row:last-child,
.top-users .user-row:last-child {
  border-bottom: none;
}

.event-name,
.user-name {
  color: var(--gray-700);
}

.event-count,
.user-count {
  color: var(--olive-dark);
  font-weight: 600;
}

.daily-chart {
  margin-top: 1rem;
}

.daily-chart h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 1rem;
}

.chart-bars {
  display: flex;
  align-items: flex-end;
  height: 150px;
  gap: 4px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--gray-200);
}

.chart-bar-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
}

.chart-bar {
  width: 100%;
  max-width: 40px;
  background: var(--olive-base);
  border-radius: 2px 2px 0 0;
  min-height: 2px;
  transition: var(--transition-base);
}

.chart-bar:hover {
  background: var(--olive-dark);
}

.chart-label {
  font-size: 0.625rem;
  color: var(--gray-500);
  margin-top: 4px;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transform: rotate(180deg);
}

/* 響應式 */
@media (max-width: 1024px) {
  .audit-filters .filter-row {
    flex-wrap: wrap;
  }

  .audit-filters .filter-group {
    flex: 1 1 calc(50% - 0.5rem);
  }

  .audit-stats-modal .stats-overview {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .audit-logs-page .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .audit-filters .filter-group {
    flex: 1 1 100%;
  }

  .audit-table {
    display: block;
    overflow-x: auto;
  }

  .audit-stats-modal .stats-overview {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-sections {
    grid-template-columns: 1fr;
  }

  .chart-bars {
    height: 100px;
  }
}

/* ==================== SCORM 管理頁面 ==================== */
.scorm-manager-page {
  width: 100%;
  max-width: none;
  margin: 0;
}

.scorm-manager-page .page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--gray-200);
}

.scorm-manager-page .page-header h1 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--olive-deep);
}

.scorm-manager-page .page-header h1 svg {
  color: var(--olive);
}

.scorm-info-banner {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background: linear-gradient(135deg, var(--olive-muted) 0%, rgba(45, 43, 107, 0.05) 100%);
  border: 1px solid rgba(45, 43, 107, 0.2);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
}

.scorm-info-banner svg {
  color: var(--olive);
  flex-shrink: 0;
  margin-top: 2px;
}

.scorm-info-banner p {
  color: var(--olive-deep);
  font-size: 0.9rem;
  line-height: 1.5;
  margin: 0;
}

.scorm-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.scorm-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  width: 100%;
  appearance: none;
  text-align: left;
  color: inherit;
  font: inherit;
  transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base), opacity var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.scorm-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.scorm-card:focus-visible {
  outline: 3px solid rgba(74, 93, 35, 0.22);
  outline-offset: 3px;
}

.scorm-card .card-header {
  background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
  padding: 1.25rem;
  color: white;
}

.scorm-card .card-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
}

.scorm-card .card-header .version-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.5rem;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.scorm-card .card-body {
  padding: 1.25rem;
}

.scorm-card .card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
  color: var(--gray-500);
  font-size: 0.85rem;
}

.scorm-card .card-meta span {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.scorm-card .card-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-200);
}

.scorm-card .card-actions button {
  flex: 1;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, opacity 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}

.scorm-card .card-actions button.btn-launch {
  background: var(--olive);
  color: white;
  border: none;
}

.scorm-card .card-actions button.btn-launch:hover {
  background: var(--olive-deep);
}

.scorm-card .card-actions button.btn-report {
  background: transparent;
  color: var(--gray-600);
  border: 1px solid var(--gray-300);
}

.scorm-card .card-actions button.btn-report:hover {
  background: var(--gray-100);
}

/* ==================== LTI 管理頁面 ==================== */
.lti-manager-page {
  width: 100%;
  max-width: none;
  margin: 0;
}

.lti-manager-page .page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--gray-200);
}

.lti-manager-page .page-header h1 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--olive-deep);
}

.lti-manager-page .page-header h1 svg {
  color: var(--olive);
}

.lti-manager-page .header-actions {
  display: flex;
  gap: 0.75rem;
}

.lti-config-panel {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.05) 100%);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.lti-config-panel h3 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: #059669;
  margin: 0 0 1rem;
}

.lti-config-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.lti-config-item {
  background: white;
  padding: 0.75rem;
  border-radius: var(--radius-md);
}

.lti-config-item .label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--gray-500);
  margin-bottom: 0.25rem;
}

.lti-config-item .value {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: var(--charcoal);
  word-break: break-all;
}

.lti-config-item .copy-btn {
  padding: 0.25rem;
  background: transparent;
  border: none;
  color: var(--gray-400);
  cursor: pointer;
  border-radius: 4px;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, opacity 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  flex-shrink: 0;
}

.lti-config-item .copy-btn:hover {
  background: var(--gray-100);
  color: var(--olive);
}

.lti-tools-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 1.5rem;
}

.lti-tool-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  width: 100%;
  appearance: none;
  text-align: left;
  color: inherit;
  font: inherit;
  transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base), opacity var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.lti-tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.lti-tool-card:focus-visible {
  outline: 3px solid rgba(74, 93, 35, 0.22);
  outline-offset: 3px;
}

.lti-tool-card .card-header {
  background: linear-gradient(135deg, #0891B2 0%, #06B6D4 100%);
  padding: 1rem 1.25rem;
  color: white;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.lti-tool-card .card-header h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
}

.lti-tool-card .status-badge {
  padding: 0.25rem 0.5rem;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 500;
}

.lti-tool-card .status-badge.active {
  background: rgba(16, 185, 129, 0.3);
}

.lti-tool-card .card-body {
  padding: 1.25rem;
}

.lti-tool-card .tool-url {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--gray-500);
  background: var(--gray-100);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-bottom: 1rem;
}

.lti-tool-card .tool-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  color: var(--gray-500);
  font-size: 0.8rem;
  margin-bottom: 1rem;
}

.lti-tool-card .tool-meta span {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.lti-tool-card .card-actions {
  display: flex;
  gap: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-200);
}

.lti-tool-card .card-actions button {
  flex: 1;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, opacity 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}

/* ==================== H5P 管理頁面 ==================== */
.h5p-manager-page {
  width: 100%;
  max-width: none;
  margin: 0;
}

.h5p-manager-page .page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--gray-200);
}

.h5p-manager-page .page-header h1 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--olive-deep);
}

.h5p-manager-page .page-header h1 svg {
  color: var(--olive);
}

.h5p-filter-bar,
.management-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.h5p-filter-bar .filter-btn,
.management-filter-bar .filter-btn {
  padding: 0.5rem 1rem;
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--gray-600);
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, opacity 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.h5p-filter-bar .filter-btn:hover,
.management-filter-bar .filter-btn:hover {
  border-color: var(--olive);
  color: var(--olive);
}

.h5p-filter-bar .filter-btn.active,
.management-filter-bar .filter-btn.active {
  background: var(--olive);
  border-color: var(--olive);
  color: white;
}

.h5p-content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.h5p-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  width: 100%;
  appearance: none;
  text-align: left;
  color: inherit;
  font: inherit;
  transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base), opacity var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.h5p-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.h5p-card:focus-visible {
  outline: 3px solid rgba(74, 93, 35, 0.22);
  outline-offset: 3px;
}

.h5p-card .card-thumbnail {
  height: 120px;
  background: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
}

.h5p-card .card-thumbnail svg {
  margin-bottom: 0.5rem;
}

.h5p-card .card-thumbnail .type-name {
  font-size: 0.85rem;
  font-weight: 500;
  opacity: 0.9;
}

.h5p-card .card-body {
  padding: 1.25rem;
}

.h5p-card .card-body h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--charcoal);
}

.h5p-card .card-body p {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin: 0 0 1rem;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.h5p-card .card-stats {
  display: flex;
  gap: 1rem;
  color: var(--gray-500);
  font-size: 0.8rem;
  margin-bottom: 1rem;
}

.h5p-card .card-stats span {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.h5p-card .card-actions {
  display: flex;
  gap: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-200);
}

.h5p-card .card-actions button {
  flex: 1;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, opacity 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}

.h5p-card .card-actions button.btn-preview {
  background: var(--olive);
  color: white;
  border: none;
}

.h5p-card .card-actions button.btn-preview:hover {
  background: var(--olive-deep);
}

.h5p-card .card-actions button.btn-report {
  background: transparent;
  color: var(--gray-600);
  border: 1px solid var(--gray-300);
}

.h5p-card .card-actions button.btn-report:hover {
  background: var(--gray-100);
}

.h5p-card .content-status {
  margin-left: auto;
}

.lti-tool-card .card-actions .btn-launch {
  background: var(--olive);
  color: white;
  border: none;
}

.lti-tool-card .card-actions .btn-launch:hover {
  background: var(--olive-deep);
}

.lti-tool-card .card-actions .btn-manage {
  background: transparent;
  color: var(--gray-600);
  border: 1px solid var(--gray-300);
}

.lti-tool-card .card-actions .btn-manage:hover {
  background: var(--gray-100);
}

.management-status-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.3rem 0.72rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  white-space: nowrap;
}

.management-status-badge.is-neutral {
  background: var(--gray-100);
  color: var(--gray-600);
}

.management-status-badge.is-success {
  background: #dcfce7;
  color: #166534;
}

.management-status-badge.is-warning {
  background: #fef3c7;
  color: #92400e;
}

.management-status-badge.is-danger {
  background: #fee2e2;
  color: var(--danger);
}

.management-status-badge.is-accent {
  background: #dbeafe;
  color: #1d4ed8;
}

.management-status-stack {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  min-width: 0;
}

.management-status-stack small {
  color: var(--gray-500);
  font-size: 0.72rem;
  line-height: 1.2;
  white-space: nowrap;
}

.management-row-actions {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
}

.management-metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.management-metric-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.management-metric-card.tone-info {
  background: #f0f9ff;
}

.management-metric-card.tone-warning {
  background: #fffbeb;
}

.management-metric-card.tone-danger {
  background: #fef2f2;
}

.management-metric-card.tone-critical {
  background: #7f1d1d;
  border-color: #7f1d1d;
}

.management-metric-value {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--charcoal);
  line-height: 1;
}

.management-metric-card.tone-info .management-metric-value {
  color: #0369a1;
}

.management-metric-card.tone-warning .management-metric-value {
  color: #b45309;
}

.management-metric-card.tone-danger .management-metric-value {
  color: var(--danger);
}

.management-metric-card.tone-critical .management-metric-value,
.management-metric-card.tone-critical .management-metric-label,
.management-metric-card.tone-critical .management-metric-helper {
  color: white;
}

.management-metric-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gray-500);
}

.management-metric-helper {
  font-size: 0.78rem;
  color: var(--gray-500);
}

.management-detail-page {
  width: 100%;
  max-width: none;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.management-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  width: fit-content;
  padding: 0;
  border: none;
  background: none;
  color: var(--olive);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
}

.management-back-link:hover {
  color: var(--olive-deep);
}

.management-detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
}

.management-detail-copy {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.management-detail-kicker {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--olive);
}

.management-detail-copy h2 {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--olive-deep);
}

.management-detail-copy p {
  margin: 0;
  color: var(--gray-500);
  font-size: 0.95rem;
  line-height: 1.6;
  max-width: 760px;
}

.management-detail-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.quiz-report-download-menu {
  position: fixed;
  z-index: 10010;
  display: grid;
  grid-template-columns: repeat(2, minmax(72px, 1fr));
  gap: 0.35rem;
  padding: 0.42rem;
  border: 1px solid rgba(26, 58, 92, 0.12);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 16px 36px rgba(26, 58, 92, 0.18);
}

.quiz-report-download-menu button {
  min-height: 34px;
  padding: 0.42rem 0.72rem;
  border: 0;
  border-radius: 10px;
  background: rgba(26, 58, 92, 0.07);
  color: var(--navy);
  font-size: 0.76rem;
  font-weight: 800;
  line-height: 1;
  text-align: center;
  cursor: pointer;
}

.management-panel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.management-panel {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 1.1rem 1.2rem;
}

.management-panel h3,
.management-panel h4 {
  margin: 0 0 0.85rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--charcoal);
}

.management-kv-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.management-kv-item {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 0.75rem;
  align-items: start;
}

.management-kv-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gray-500);
}

.management-kv-value {
  color: var(--charcoal);
  font-size: 0.9rem;
  line-height: 1.6;
  word-break: break-word;
}

.management-kv-value.is-code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
}

.management-rich-preview {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 1rem;
}

.management-preview-frame {
  min-height: 220px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  background: var(--gray-50);
  overflow: hidden;
}

.management-empty-preview {
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-500);
  text-align: center;
  padding: 1.5rem;
}

.management-table-shell {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.h5p-event-table-scroll {
  max-width: 100%;
  overflow-x: auto;
}

.h5p-event-history .management-table {
  min-width: 760px;
}

.h5p-event-verb {
  display: block;
  margin-top: 0.2rem;
  color: var(--gray-500);
  font-size: 0.72rem;
  text-transform: none;
}

.management-table-heading {
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.management-table-heading h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--charcoal);
}

.management-table {
  width: 100%;
  border-collapse: collapse;
}

.management-table th {
  background: var(--gray-50);
  padding: 0.85rem 1rem;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--gray-500);
  border-bottom: 1px solid var(--gray-200);
}

.management-table td {
  padding: 0.85rem 1rem;
  font-size: 0.88rem;
  color: var(--gray-700);
  border-bottom: 1px solid var(--gray-100);
}

.management-table tbody tr:last-child td {
  border-bottom: none;
}

.management-table td.is-center,
.management-table th.is-center {
  text-align: center;
}

.management-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.management-pagination-info {
  font-size: 0.9rem;
  color: var(--gray-500);
  padding: 0.4rem 0.7rem;
}

.management-inline-stack {
  display: inline-flex;
  flex-direction: column;
  gap: 0.15rem;
}

.management-inline-stack strong {
  color: var(--charcoal);
}

.teacher-analytics-page {
  gap: 1.25rem;
}

.teacher-analytics-spotlight-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.teacher-analytics-panel-note {
  margin-top: 0.9rem;
  color: var(--gray-500);
  font-size: 0.82rem;
  line-height: 1.65;
}

.teacher-analytics-risk-summary {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.teacher-analytics-progress-cell {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
}

.teacher-analytics-progress-bar {
  width: 120px;
  height: 8px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.18);
  overflow: hidden;
  flex-shrink: 0;
}

.teacher-analytics-progress-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, rgba(97, 116, 81, 0.92), rgba(33, 73, 58, 0.92));
}

.teacher-analytics-alert-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.teacher-analytics-alert-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.34rem 0.72rem;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 600;
  line-height: 1.4;
}

.teacher-analytics-alert-chip.is-warning {
  background: #fef3c7;
  color: #92400e;
}

.teacher-analytics-alert-chip.is-danger {
  background: #fee2e2;
  color: #b91c1c;
}

/* 共用模態框樣式 - SCORM/LTI/H5P */
.scorm-modal,
.lti-modal,
.h5p-modal {
  max-width: 500px;
  width: 90%;
}

.scorm-modal .modal-body,
.lti-modal .modal-body,
.h5p-modal .modal-body {
  padding: 1.5rem;
}

.scorm-modal .form-group,
.lti-modal .form-group,
.h5p-modal .form-group {
  margin-bottom: 1.25rem;
}

.scorm-modal .form-group label,
.lti-modal .form-group label,
.h5p-modal .form-group label {
  display: block;
  font-weight: 500;
  color: var(--charcoal);
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.scorm-modal .form-group input,
.scorm-modal .form-group select,
.scorm-modal .form-group textarea,
.lti-modal .form-group input,
.lti-modal .form-group select,
.lti-modal .form-group textarea,
.h5p-modal .form-group input,
.h5p-modal .form-group select,
.h5p-modal .form-group textarea {
  width: 100%;
  padding: 0.82rem 1rem;
  border: 1px solid rgba(26, 58, 92, 0.14);
  border-radius: 16px;
  font-size: 0.9rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(248, 244, 236, 0.9) 100%);
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, opacity 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.scorm-modal .form-group select,
.lti-modal .form-group select,
.h5p-modal .form-group select {
  padding-right: 3rem;
  background-image:
    linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(248, 244, 236, 0.9) 100%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6.5L8 10.5L12 6.5' stroke='%231a3a5c' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat, no-repeat;
  background-position: 0 0, calc(100% - 1rem) 50%;
  background-size: 100% 100%, 14px 14px;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.84),
    0 12px 24px rgba(15, 23, 42, 0.05);
}

.scorm-modal .form-group input:focus,
.scorm-modal .form-group select:focus,
.scorm-modal .form-group textarea:focus,
.lti-modal .form-group input:focus,
.lti-modal .form-group select:focus,
.lti-modal .form-group textarea:focus,
.h5p-modal .form-group input:focus,
.h5p-modal .form-group select:focus,
.h5p-modal .form-group textarea:focus {
  outline: none;
  border-color: var(--olive);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.88),
    0 0 0 4px rgba(168, 184, 154, 0.14),
    0 16px 30px rgba(15, 23, 42, 0.08);
}

.scorm-modal .modal-actions,
.lti-modal .modal-actions,
.h5p-modal .modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-200);
  margin-top: 1rem;
}

/* 報告模態框 */
.report-modal {
  max-width: 700px;
  width: 90%;
}

.report-modal .report-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.report-modal .summary-card {
  background: var(--gray-50);
  padding: 1rem;
  border-radius: var(--radius-md);
  text-align: center;
}

.report-modal .summary-card .value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--olive-deep);
}

.report-modal .summary-card .label {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-top: 0.25rem;
}

.report-modal .attempts-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.report-modal .attempts-table th {
  background: var(--gray-100);
  padding: 0.75rem;
  text-align: left;
  font-weight: 600;
  color: var(--gray-600);
  border-bottom: 1px solid var(--gray-200);
}

.report-modal .attempts-table td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--gray-200);
}

/* 響應式調整 */
@media (max-width: 768px) {
  .scorm-list,
  .lti-tools-list,
  .h5p-content-grid {
    grid-template-columns: 1fr;
  }

  .scorm-manager-page .page-header,
  .lti-manager-page .page-header,
  .h5p-manager-page .page-header {
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
  }

  .lti-config-grid {
    grid-template-columns: 1fr;
  }

  .h5p-filter-bar,
  .management-filter-bar {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.5rem;
  }

  .h5p-filter-bar .filter-btn,
  .management-filter-bar .filter-btn {
    white-space: nowrap;
    flex-shrink: 0;
  }

  .management-detail-header {
    flex-direction: column;
    align-items: stretch;
  }

  .management-panel-grid,
  .management-metric-grid {
    grid-template-columns: 1fr;
  }

  .management-kv-item {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .management-table {
    display: block;
    overflow-x: auto;
  }

  .teacher-analytics-page .management-table-shell {
    overflow: visible;
  }

  .teacher-analytics-page .management-table-heading {
    flex-direction: column;
    align-items: flex-start;
  }

  .teacher-analytics-page .management-table,
  .teacher-analytics-page .management-table thead,
  .teacher-analytics-page .management-table tbody {
    display: block;
  }

  .teacher-analytics-page .management-table thead {
    display: none;
  }

  .teacher-analytics-page .management-table tbody {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    padding: 0.85rem;
  }

  .teacher-analytics-page .management-table tr {
    display: grid;
    gap: 0.8rem;
    padding: 1rem;
    border: 1px solid rgba(26, 58, 92, 0.1);
    border-radius: 18px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 245, 239, 0.96));
    box-shadow: 0 10px 22px rgba(15, 23, 42, 0.05);
  }

  .teacher-analytics-page .management-table td {
    display: grid;
    grid-template-columns: minmax(82px, 96px) minmax(0, 1fr);
    gap: 0.75rem;
    padding: 0;
    border: none;
    font-size: 0.86rem;
    align-items: start;
  }

  .teacher-analytics-page .management-table td::before {
    content: attr(data-label);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--gray-500);
  }

  .teacher-analytics-page .management-inline-stack,
  .teacher-analytics-page .teacher-analytics-alert-list {
    min-width: 0;
  }

  .teacher-analytics-page .teacher-analytics-progress-cell {
    flex-wrap: wrap;
    row-gap: 0.4rem;
  }

  .teacher-analytics-page .teacher-analytics-progress-bar {
    width: min(160px, 100%);
    flex: 1 1 120px;
  }

  .teacher-analytics-page .teacher-analytics-alert-chip {
    justify-content: flex-start;
    text-align: left;
    white-space: normal;
  }
}

/* ==================== 評分標準頁面 ==================== */
.rubrics-page {
  width: 100%;
  max-width: none;
  margin: 0;
}

.rubrics-page .page-header-modern {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--gray-200);
}

.rubrics-page .page-header-modern .header-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--olive-deep);
  margin: 0 0 0.25rem;
}

.rubrics-page .page-header-modern .header-content p {
  color: var(--gray-500);
  margin: 0;
  font-size: 0.9rem;
}

.rubrics-page .header-actions {
  display: flex;
  gap: 0.75rem;
}

.rubrics-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem;
}

.rubric-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base), opacity var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.rubric-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.rubric-card .card-header {
  padding: 1.25rem;
  border-bottom: 1px solid var(--gray-200);
}

.rubric-card .card-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--charcoal);
}

.rubric-card .card-meta {
  display: flex;
  gap: 1rem;
  color: var(--gray-500);
  font-size: 0.8rem;
}

.rubric-card .card-body {
  padding: 1.25rem;
}

.rubric-card .criteria-preview {
  font-size: 0.85rem;
  color: var(--gray-600);
}

.rubric-card .criteria-preview li {
  margin-bottom: 0.25rem;
}

.rubric-card .card-actions {
  display: flex;
  gap: 0.5rem;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--gray-200);
  background: var(--gray-50);
}

.rubric-card .card-actions button {
  flex: 1;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, opacity 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.rubric-builder-modal {
  max-width: 820px;
}

.rubric-builder-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.rubric-builder-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.rubric-builder-heading h4 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--charcoal);
}

.rubric-builder-list {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.rubric-criterion-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,250,252,0.92));
}

.rubric-criterion-header {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
}

.rubric-criterion-header .form-group {
  flex: 1;
}

.rubric-criterion-remove {
  flex-shrink: 0;
  align-self: flex-end;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: none;
  background: #fee2e2;
  color: var(--danger);
  cursor: pointer;
  font-size: 1.15rem;
  line-height: 1;
}

.rubric-criterion-remove:hover {
  background: #fecaca;
}

.criterion-levels {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.criterion-level-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.6rem;
  border-radius: 12px;
  background: var(--gray-50);
}

.criterion-level-chip input {
  border: none;
  background: transparent;
  color: var(--charcoal);
  font-size: 0.85rem;
}

.criterion-level-chip .level-name {
  width: 76px;
}

.criterion-level-chip .level-score {
  width: 52px;
}

.rubric-template-modal {
  max-width: 620px;
}

.rubric-template-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.rubric-template-option {
  padding: 1rem;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  background: var(--white);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.rubric-template-option:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  border-color: rgba(87, 109, 72, 0.18);
}

.rubric-template-option h4 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--charcoal);
}

.rubric-template-option p {
  margin: 0;
  color: var(--gray-500);
  font-size: 0.88rem;
  line-height: 1.5;
}

/* ==================== 課程完成設定頁面 ==================== */
.completion-settings-page {
  width: 100%;
  max-width: none;
  margin: 0;
}

.completion-settings-page .page-header-modern {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--gray-200);
}

.completion-settings-page .page-header-modern .header-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--olive-deep);
  margin: 0 0 0.25rem;
}

.completion-settings-page .page-header-modern .header-content p {
  color: var(--gray-500);
  margin: 0;
  font-size: 0.9rem;
}

.completion-settings-page .courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.completion-settings-page .course-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base), opacity var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.completion-settings-page .course-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.completion-settings-page .course-card .card-cover {
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.completion-settings-page .course-card .card-body {
  padding: 1rem;
}

.completion-settings-page .course-card .card-body h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
  color: var(--charcoal);
}

.completion-settings-page .course-card .card-body p {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin: 0;
}

/* 課程完成條件 Modal 樣式 */
.criterion-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--gray-50);
  border-radius: var(--radius-md);
  margin-bottom: 0.5rem;
}

.criterion-item .criterion-type {
  min-width: 140px;
}

.criterion-item .criterion-options {
  flex: 1;
}

.criterion-item .criterion-value {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
}

.criterion-item .btn-remove {
  padding: 0.25rem 0.5rem;
  background: transparent;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 1.2rem;
  line-height: 1;
}

.criterion-item .btn-remove:hover {
  background: rgba(245, 101, 101, 0.1);
  border-radius: var(--radius-sm);
}

/* 響應式調整 */
@media (max-width: 768px) {
  .rubrics-list {
    grid-template-columns: 1fr;
  }

  .rubric-criterion-header {
    flex-direction: column;
    align-items: stretch;
  }

  .completion-settings-page .courses-grid {
    grid-template-columns: 1fr;
  }

  .rubrics-page .page-header-modern,
  .completion-settings-page .page-header-modern {
    flex-direction: column;
    gap: 1rem;
  }
}

/* ==================== Quill 富文本編輯器樣式 ==================== */
.quill-editor-container {
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.quill-editor-container:focus-within {
  border-color: var(--olive);
  box-shadow: 0 0 0 3px rgba(128, 128, 64, 0.1);
}

/* Quill 工具列樣式 */
.quill-editor-container .ql-toolbar {
  border: none;
  border-bottom: 1px solid var(--gray-200);
  background: var(--gray-50);
  padding: 0.75rem;
  font-family: inherit;
}

.quill-editor-container .ql-toolbar .ql-formats {
  margin-right: 1rem;
}

.quill-editor-container .ql-toolbar button {
  width: 32px;
  height: 32px;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.quill-editor-container .ql-toolbar button:hover {
  background: var(--gray-200);
}

.quill-editor-container .ql-toolbar button.ql-active {
  background: var(--olive);
  color: var(--white);
}

.quill-editor-container .ql-toolbar button.ql-active .ql-stroke {
  stroke: var(--white);
}

.quill-editor-container .ql-toolbar button.ql-active .ql-fill {
  fill: var(--white);
}

.quill-editor-container .ql-toolbar .ql-picker {
  font-size: 0.875rem;
}

.quill-editor-container .ql-toolbar .ql-picker-label {
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  border-color: var(--gray-300);
}

.quill-editor-container .ql-toolbar .ql-picker-label:hover {
  background: var(--gray-200);
  border-color: var(--gray-400);
}

.quill-editor-container .ql-toolbar .ql-picker-options {
  border-radius: var(--radius-md);
  border-color: var(--gray-200);
  box-shadow: var(--shadow-md);
}

/* Quill 編輯區域樣式 */
.quill-editor-container .ql-container {
  border: none;
  font-family: inherit;
  font-size: 0.95rem;
}

.quill-editor-container .ql-editor {
  min-height: 150px;
  padding: 1rem;
  color: var(--charcoal);
  line-height: 1.6;
}

.quill-editor-container .ql-editor.ql-blank::before {
  color: var(--gray-400);
  font-style: normal;
}

/* 編輯器內容樣式 */
.quill-editor-container .ql-editor h1 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: 0.75rem;
}

.quill-editor-container .ql-editor h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: 0.5rem;
}

.quill-editor-container .ql-editor h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: 0.5rem;
}

.quill-editor-container .ql-editor p {
  margin-bottom: 0.75rem;
}

.quill-editor-container .ql-editor ul,
.quill-editor-container .ql-editor ol {
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
}

.quill-editor-container .ql-editor li {
  margin-bottom: 0.25rem;
}

.quill-editor-container .ql-editor blockquote {
  border-left: 4px solid var(--olive);
  padding-left: 1rem;
  margin: 1rem 0;
  color: var(--gray-600);
  background: var(--gray-50);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 0.75rem 1rem;
}

.quill-editor-container .ql-editor pre {
  background: var(--charcoal);
  color: var(--cream);
  padding: 1rem;
  border-radius: var(--radius-md);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.875rem;
  overflow-x: auto;
  margin: 1rem 0;
}

.quill-editor-container .ql-editor code {
  background: var(--gray-100);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.875rem;
  color: var(--terracotta);
}

.quill-editor-container .ql-editor a {
  color: var(--olive);
  text-decoration: underline;
}

.quill-editor-container .ql-editor a:hover {
  color: var(--olive-deep);
}

.quill-editor-container .ql-editor img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: 0.5rem 0;
}

/* 簡潔版工具列 (用於回覆等較小區域) */
.quill-editor-simple .ql-toolbar {
  padding: 0.5rem;
}

.quill-editor-simple .ql-toolbar button {
  width: 28px;
  height: 28px;
}

.quill-editor-simple .ql-editor {
  min-height: 100px;
  padding: 0.75rem;
}

/* 回覆區域編輯器 */
.reply-form .quill-editor-container {
  margin-bottom: 1rem;
}

/* 作業提交編輯器 */
.submission-area .quill-editor-container {
  margin-bottom: 1.5rem;
}

.submission-area .quill-editor-container .ql-editor {
  min-height: 200px;
}

/* 討論區編輯器 */
.modal-body .quill-editor-container {
  margin-top: 0.5rem;
}

/* 響應式調整 */
@media (max-width: 768px) {
  .quill-editor-container .ql-toolbar {
    padding: 0.5rem;
    flex-wrap: wrap;
  }

  .quill-editor-container .ql-toolbar .ql-formats {
    margin-right: 0.5rem;
    margin-bottom: 0.25rem;
  }

  .quill-editor-container .ql-toolbar button {
    width: 28px;
    height: 28px;
  }

  .quill-editor-container .ql-editor {
    min-height: 120px;
    padding: 0.75rem;
  }
}

/* ==================== 麵包屑導航 ==================== */
.page-header-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem;
  font-size: 0.85rem;
  color: var(--gray-500);
}

.breadcrumb-nav a {
  color: var(--olive);
  text-decoration: none;
  transition: color 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.breadcrumb-nav a:hover {
  color: var(--olive-deep);
  text-decoration: underline;
}

.breadcrumb-nav .breadcrumb-separator {
  color: var(--gray-400);
  margin: 0 0.25rem;
  font-size: 0.75rem;
}

.breadcrumb-nav .breadcrumb-separator svg {
  width: 12px;
  height: 12px;
  stroke: currentColor;
}

.breadcrumb-nav .breadcrumb-current {
  color: var(--charcoal);
  font-weight: 500;
}

.breadcrumb-nav .breadcrumb-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.breadcrumb-nav .breadcrumb-home svg {
  width: 16px;
  height: 16px;
}

/* 響應式調整 */
@media (max-width: 768px) {
  .breadcrumb-nav {
    font-size: 0.8rem;
    margin-bottom: 0.25rem;
  }

  .breadcrumb-nav .breadcrumb-separator {
    margin: 0 0.125rem;
  }

  /* 在手機上隱藏中間層級，只顯示首頁和當前頁 */
  .breadcrumb-nav.breadcrumb-collapsed .breadcrumb-middle {
    display: none;
  }

  .breadcrumb-nav.breadcrumb-collapsed .breadcrumb-ellipsis {
    display: inline;
  }
}

.breadcrumb-nav .breadcrumb-ellipsis {
  display: none;
  color: var(--gray-400);
}

/* ==================== 學生儀表板增強樣式 ==================== */

/* 個人化問候區域 */
.dashboard-greeting {
  background: linear-gradient(135deg, var(--olive) 0%, var(--olive-deep) 100%);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 1.5rem;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.dashboard-greeting::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
}

.dashboard-greeting::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 200px;
  height: 200px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 50%;
}

.greeting-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 1;
}

.greeting-text h1 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.greeting-text p {
  opacity: 0.9;
  font-size: 0.95rem;
}

.greeting-stats {
  display: flex;
  gap: 2rem;
}

.greeting-stat-item {
  text-align: center;
}

.greeting-stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.greeting-stat-label {
  font-size: 0.75rem;
  opacity: 0.85;
}

/* 進度圓環 */
.progress-ring-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.progress-ring {
  position: relative;
  width: 120px;
  height: 120px;
}

.progress-ring svg {
  transform: rotate(-90deg);
  width: 100%;
  height: 100%;
}

.progress-ring circle {
  fill: none;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.5s ease;
}

.progress-ring .progress-bg {
  stroke: rgba(255, 255, 255, 0.2);
  stroke-width: 8;
}

.progress-ring .progress-fill {
  stroke: var(--white);
  stroke-width: 8;
}

.progress-ring .progress-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.progress-ring .progress-value {
  font-size: 1.5rem;
  font-weight: 700;
  display: block;
}

.progress-ring .progress-label {
  font-size: 0.7rem;
  opacity: 0.85;
}

/* 緊急提醒區域增強 */
.urgent-alert {
  background: linear-gradient(135deg, var(--terracotta) 0%, #c75a3a 100%);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--white);
  margin-bottom: 1rem;
  animation: pulse-subtle 2s infinite;
}

@keyframes pulse-subtle {
  0%, 100% { box-shadow: 0 0 0 0 rgba(199, 90, 58, 0.4); }
  50% { box-shadow: 0 0 0 8px rgba(199, 90, 58, 0); }
}

.urgent-alert-icon {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.urgent-alert-icon svg {
  width: 20px;
  height: 20px;
}

.urgent-alert-content {
  flex: 1;
}

.urgent-alert-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.urgent-alert-subtitle {
  font-size: 0.85rem;
  opacity: 0.9;
}

.urgent-alert-action {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--white);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.2s ease;
}

.urgent-alert-action:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* 迷你行事曆 */
.mini-calendar {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.mini-calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.mini-calendar-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.mini-calendar-nav {
  display: flex;
  gap: 0.25rem;
}

.mini-calendar-nav button {
  width: 28px;
  height: 28px;
  border: none;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease;
}

.mini-calendar-nav button:hover {
  background: var(--gray-200);
}

.mini-calendar-nav button svg {
  width: 14px;
  height: 14px;
}

.mini-calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  text-align: center;
  font-size: 0.75rem;
}

.mini-calendar-day-name {
  color: var(--gray-500);
  padding: 0.25rem;
  font-weight: 500;
}

.mini-calendar-day {
  padding: 0.35rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.mini-calendar-day:hover {
  background: var(--gray-100);
}

.mini-calendar-day.today {
  background: var(--olive);
  color: var(--white);
  font-weight: 600;
}

.mini-calendar-day.has-event {
  position: relative;
}

.mini-calendar-day.has-event::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background: var(--terracotta);
  border-radius: 50%;
}

.mini-calendar-day.other-month {
  color: var(--gray-300);
}

/* 最近成績卡片 */
.grade-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--gray-50);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.grade-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.grade-card:last-child {
  margin-bottom: 0;
}

.grade-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.grade-icon.assignment {
  background: rgba(199, 90, 58, 0.1);
  color: var(--terracotta);
}

.grade-icon.quiz {
  background: rgba(66, 153, 225, 0.1);
  color: var(--blue);
}

.grade-icon svg {
  width: 20px;
  height: 20px;
}

.grade-info {
  flex: 1;
  min-width: 0;
}

.grade-title {
  font-weight: 500;
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.grade-meta {
  font-size: 0.75rem;
  color: var(--gray-500);
}

.grade-score {
  text-align: right;
  flex-shrink: 0;
}

.grade-value {
  font-size: 1.25rem;
  font-weight: 700;
}

.grade-value.excellent {
  color: var(--success);
}

.grade-value.good {
  color: var(--olive);
}

.grade-value.average {
  color: var(--terracotta);
}

.grade-value.poor {
  color: var(--danger);
}

.grade-max {
  font-size: 0.75rem;
  color: var(--gray-500);
}

/* 響應式調整 */
@media (max-width: 768px) {
  .dashboard-greeting {
    padding: 1.5rem;
  }

  .greeting-content {
    flex-direction: column;
    text-align: center;
    gap: 1.5rem;
  }

  .greeting-text h1 {
    font-size: 1.4rem;
  }

  .greeting-stats {
    justify-content: center;
    gap: 1.5rem;
  }

  .progress-ring {
    width: 100px;
    height: 100px;
  }

  .progress-ring .progress-value {
    font-size: 1.25rem;
  }

  .urgent-alert {
    flex-direction: column;
    text-align: center;
  }

  .mini-calendar {
    display: none;
  }
}

/* ==================== 教師儀表板增強樣式 ==================== */

/* 教師概覽區域 (使用不同的漸層色) */
.dashboard-greeting.teacher-greeting {
  background: linear-gradient(135deg, var(--terracotta) 0%, #c75a3a 100%);
}

/* 待評分佇列樣式 */
.grading-queue {
  max-height: 400px;
  overflow-y: auto;
}

.grading-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--gray-50);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
}

.grading-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.grading-item:last-child {
  margin-bottom: 0;
}

.grading-item.urgent {
  border-left: 4px solid var(--terracotta);
  background: rgba(199, 90, 58, 0.05);
}

.grading-item-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--olive);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.grading-item-info {
  flex: 1;
  min-width: 0;
}

.grading-item-title {
  font-weight: 500;
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.grading-item-meta {
  font-size: 0.75rem;
  color: var(--gray-500);
  display: flex;
  gap: 0.75rem;
}

.grading-item-status {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.grading-item-status.waiting {
  background: rgba(199, 90, 58, 0.1);
  color: var(--terracotta);
}

.grading-item-status.reviewed {
  background: rgba(128, 128, 64, 0.1);
  color: var(--olive);
}

/* 學生警示卡片 */
.student-alert-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--gray-50);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  border-left: 4px solid var(--terracotta);
}

.student-alert-item:last-child {
  margin-bottom: 0;
}

.student-alert-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--terracotta);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.student-alert-info {
  flex: 1;
  min-width: 0;
}

.student-alert-name {
  font-weight: 500;
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}

.student-alert-reason {
  font-size: 0.75rem;
  color: var(--terracotta);
}

.student-alert-action {
  font-size: 0.8rem;
  color: var(--olive);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--olive-light);
  transition: background 0.2s ease;
}

.student-alert-action:hover {
  background: var(--gray-200);
}

/* 快捷操作按鈕 hover 效果 */
.teacher-action-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* 待評分佇列項目 */
.grading-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--gray-100);
  cursor: pointer;
  transition: background 0.2s ease;
}

.grading-item:last-child {
  border-bottom: none;
}

.grading-item:hover {
  background: var(--olive-light);
}

.grading-item-info {
  flex: 1;
  min-width: 0;
}

.grading-item-title {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.grading-item-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.grading-item-count {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.5rem 0.75rem;
  background: var(--terracotta-light);
  border-radius: var(--radius-md);
  min-width: 50px;
}

.grading-item-count .count-number {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--terracotta);
  line-height: 1;
}

.grading-item-count .count-label {
  font-size: 0.65rem;
  color: var(--terracotta);
  margin-top: 0.25rem;
}

/* 最近提交列表 */
.recent-submissions-list {
  display: flex;
  flex-direction: column;
}

.submission-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--gray-100);
  cursor: pointer;
  transition: background 0.2s ease;
}

.submission-item:last-child {
  border-bottom: none;
}

.submission-item:hover {
  background: var(--olive-light);
  margin: 0 -1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
}

.submission-student {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.submission-assignment {
  font-size: 0.8rem;
  color: var(--text-secondary);
  grid-column: 1;
}

.submission-time {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-align: right;
  grid-row: 1 / 3;
  align-self: center;
}

/* Empty state 樣式 */
.empty-state.small {
  padding: 1.5rem !important;
}

.empty-state.small svg {
  width: 32px;
  height: 32px;
}

.empty-state.small p {
  font-size: 0.85rem;
}

/* ==================== Phase 3.1: 三欄式課程布局 ==================== */

/* 課程頁面主容器 */
.course-page-layout {
  display: grid;
  grid-template-columns: 280px 1fr 280px;
  gap: 1.5rem;
  min-height: calc(100vh - 200px);
}

/* 課程頭部 - 橫跨三欄 */
.course-page-header {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--olive) 0%, var(--olive-deep, #3d4a38) 100%);
  border-radius: var(--radius-lg);
  padding: 2rem;
  color: white;
  margin-bottom: 0.5rem;
}

.course-page-header .back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255, 255, 255, 0.8);
  background: rgba(255, 255, 255, 0.1);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 0.9rem;
  margin-bottom: 1rem;
  transition: background 0.2s ease;
}

.course-page-header .back-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

.course-page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 0.5rem 0;
}

.course-page-header .course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.9rem;
  opacity: 0.9;
  margin-top: 0.75rem;
}

.course-page-header .course-meta span {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.course-page-header .course-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

/* 左側欄 - 課程導航 */
.course-left-sidebar {
  position: sticky;
  top: 1rem;
  max-height: calc(100vh - 200px);
  overflow-y: auto;
}

.course-nav-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1rem;
  overflow: hidden;
}

.course-nav-card-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--gray-100);
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
}

.course-nav-card-header svg {
  width: 18px;
  height: 18px;
  color: var(--olive);
}

/* 章節樹狀導航 */
.sections-tree {
  padding: 0.5rem 0;
}

.section-tree-item {
  padding: 0;
}

.section-tree-header {
  display: flex;
  align-items: center;
  padding: 0.75rem 1.25rem;
  cursor: pointer;
  transition: background 0.2s ease;
  gap: 0.5rem;
}

.section-tree-header:hover {
  background: var(--olive-light);
}

.section-tree-header.active {
  background: var(--olive-light);
  border-left: 3px solid var(--olive);
  padding-left: calc(1.25rem - 3px);
}

.section-tree-toggle {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.section-tree-toggle.expanded {
  transform: rotate(90deg);
}

.section-tree-toggle.no-children {
  visibility: hidden;
}

.section-tree-name {
  flex: 1;
  font-size: 0.9rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.section-tree-badge {
  font-size: 0.7rem;
  background: var(--olive);
  color: white;
  padding: 2px 6px;
  border-radius: 10px;
  flex-shrink: 0;
}

/* 活動子列表 */
.section-activities-list {
  display: none;
  padding-left: 2rem;
  background: var(--gray-50);
}

.section-activities-list.expanded {
  display: block;
}

.activity-tree-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.2s ease;
}

.activity-tree-item:hover {
  background: var(--olive-light);
  color: var(--text-primary);
}

.activity-tree-item.completed {
  color: var(--success);
}

.activity-tree-item svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* 快速連結 */
.quick-links-list {
  padding: 0.5rem 0;
}

.quick-link-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  color: var(--text-primary);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s ease;
}

.quick-link-item:hover {
  background: var(--olive-light);
}

.quick-link-item svg {
  width: 18px;
  height: 18px;
  color: var(--olive);
}

.quick-link-item span {
  font-size: 0.9rem;
}

/* 中央內容區 */
.course-main-content {
  min-width: 0;
}

/* 章節卡片 */
.section-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.section-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  background: var(--cream);
  border-bottom: 1px solid var(--gray-100);
}

.section-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 0.25rem 0;
}

.section-card-summary {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
}

.section-card-actions {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}

/* 活動列表 - 改進版 */
.activity-list {
  padding: 0;
}

.activity-list-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--gray-100);
  cursor: pointer;
  transition: background 0.2s ease;
}

.activity-list-item:last-child {
  border-bottom: none;
}

.activity-list-item:hover {
  background: var(--olive-light);
}

.activity-list-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.activity-list-icon svg {
  width: 20px;
  height: 20px;
}

.activity-list-info {
  flex: 1;
  min-width: 0;
}

.activity-list-name {
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.activity-list-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.activity-list-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.activity-list-status .completed-badge {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--success-light, #d1fae5);
  color: var(--success);
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
}

/* 右側欄 */
.course-right-sidebar {
  position: sticky;
  top: 1rem;
  max-height: calc(100vh - 200px);
  overflow-y: auto;
}

.sidebar-widget {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1rem;
  overflow: hidden;
}

.sidebar-widget-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--gray-100);
  font-weight: 600;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-widget-body {
  padding: 1rem 1.25rem;
}

/* 進度環形圖 - 課程用 */
.course-progress-widget {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem;
}

.course-progress-ring {
  width: 120px;
  height: 120px;
  position: relative;
}

.course-progress-ring svg {
  transform: rotate(-90deg);
}

.course-progress-ring .progress-bg {
  fill: none;
  stroke: var(--gray-200);
  stroke-width: 8;
}

.course-progress-ring .progress-fill {
  fill: none;
  stroke: var(--olive);
  stroke-width: 8;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.5s ease;
}

.course-progress-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.course-progress-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--olive);
}

.course-progress-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.course-progress-stats {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-100);
  width: 100%;
}

.progress-stat {
  text-align: center;
}

.progress-stat-value {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.progress-stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* 最近活動小工具 */
.recent-activity-list {
  padding: 0;
}

.recent-activity-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--gray-100);
}

.recent-activity-item:last-child {
  border-bottom: none;
}

.recent-activity-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--olive-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.recent-activity-icon svg {
  width: 16px;
  height: 16px;
  color: var(--olive);
}

.recent-activity-content {
  flex: 1;
  min-width: 0;
}

.recent-activity-text {
  font-size: 0.85rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.recent-activity-time {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* 響應式調整 */
@media (max-width: 1200px) {
  .course-page-layout {
    grid-template-columns: 260px 1fr 260px;
    gap: 1rem;
  }
}

@media (max-width: 992px) {
  .course-page-layout {
    grid-template-columns: 1fr;
  }

  .course-left-sidebar,
  .course-right-sidebar {
    position: static;
    max-height: none;
    overflow-y: visible;
  }

  .course-left-sidebar {
    order: 2;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .course-main-content {
    order: 1;
  }

  .course-right-sidebar {
    order: 3;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
}

@media (max-width: 768px) {
  .badges-header {
    flex-direction: column;
    align-items: stretch;
  }

  .certificate-editor-layout,
  .certificate-score-item,
  .certificate-card-meta,
  .certificate-preview-signature {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: stretch;
  }

  .certificate-course-switcher {
    min-width: 0;
  }

  .certificate-actions {
    justify-content: stretch;
  }

  .pending-tasks-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  .teacher-quick-actions {
    grid-template-columns: 1fr !important;
  }

  .grading-item {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .grading-item-count {
    flex-direction: row;
    gap: 0.5rem;
  }

  .grading-item-count .count-label {
    margin-top: 0;
  }

  .submission-item {
    grid-template-columns: 1fr;
  }

  .submission-time {
    grid-row: auto;
    grid-column: 1;
    text-align: left;
  }

  .course-left-sidebar,
  .course-right-sidebar {
    grid-template-columns: 1fr;
  }

  .course-page-header {
    padding: 1.5rem;
  }

  .course-page-header h1 {
    font-size: 1.35rem;
  }

  .course-page-header .course-actions {
    flex-wrap: wrap;
  }

  .section-card-header {
    flex-direction: column;
    gap: 0.75rem;
  }

  .section-card-actions {
    width: 100%;
  }
}

/* === Assignment draft indicator === */
.assignment-draft-indicator {
  font-size: 0.8rem;
  color: rgba(26, 58, 92, 0.5);
  min-height: 1.1em;
  transition: color 150ms ease;
}
.assignment-draft-indicator[data-state="saving"] { color: rgba(74, 124, 89, 0.8); }
.assignment-draft-indicator[data-state="saved"]  { color: var(--olive, #4A7C59); }
.assignment-draft-indicator[data-state="error"]  { color: #B94A48; }

/* === Grading modal === */
.grading-modal {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.grading-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(26, 58, 92, 0.08);
}
.grading-modal-section {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.grading-modal-section label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--charcoal);
}
.grading-modal-section input[type="number"],
.grading-modal-section textarea {
  padding: 0.6rem 0.8rem;
  border: 1px solid rgba(26, 58, 92, 0.12);
  border-radius: 10px;
  font: inherit;
  background: rgba(255,255,255,0.96);
}
.rubric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.6rem;
}
.rubric-row {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.5rem;
  background: rgba(245, 241, 232, 0.5);
  border-radius: 8px;
}
.rubric-row label {
  font-size: 0.82rem;
  color: rgba(26, 58, 92, 0.75);
}
.rubric-row .rubric-score-input {
  padding: 0.4rem 0.6rem;
  border: 1px solid rgba(26, 58, 92, 0.12);
  border-radius: 6px;
  font: inherit;
}
.assignment-file-empty {
  padding: 0.6rem;
  font-size: 0.85rem;
  color: rgba(26, 58, 92, 0.5);
  font-style: italic;
}

/* === PDF annotator === */
.pdf-annotator {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 0.5rem;
  border: 1px solid rgba(26, 58, 92, 0.12);
  border-radius: 10px;
  padding: 0.6rem;
  background: rgba(245, 241, 232, 0.35);
}
.pdf-annotator-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.pdf-annotator-tools {
  display: flex;
  gap: 0.3rem;
}
.pdf-tool-btn {
  padding: 0.35rem 0.65rem;
  font-size: 0.82rem;
  border: 1px solid rgba(26, 58, 92, 0.18);
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
}
.pdf-tool-btn.is-active {
  background: var(--olive, #4A7C59);
  color: #fff;
  border-color: var(--olive, #4A7C59);
}
.pdf-annotator-nav {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
}
.pdf-annotator-stage {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 0.6rem;
}
@media (max-width: 760px) {
  .pdf-annotator-stage { grid-template-columns: 1fr; }
}
.pdf-annotator-canvas-wrap {
  position: relative;
  max-height: 520px;
  overflow: auto;
  background: #fff;
  border: 1px solid rgba(26, 58, 92, 0.1);
  border-radius: 6px;
}
.pdf-annotator-canvas-wrap canvas {
  display: block;
}
.pdf-overlay-canvas {
  position: absolute;
  top: 0;
  left: 0;
  cursor: crosshair;
}
.pdf-annotator-sidebar {
  background: #fff;
  border: 1px solid rgba(26, 58, 92, 0.1);
  border-radius: 6px;
  padding: 0.55rem;
  max-height: 520px;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.pdf-annotator-sidebar-title {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--charcoal);
}
.pdf-annotator-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.4rem;
  padding: 0.4rem;
  border-radius: 6px;
  background: rgba(245, 241, 232, 0.5);
  font-size: 0.82rem;
}
.pdf-annotator-empty {
  font-style: italic;
  color: rgba(26, 58, 92, 0.5);
  font-size: 0.82rem;
  padding: 0.3rem;
}

/* ============================================================
 * ============ RWD 強化層 (mobile / tablet) ==================
 * 2026-04-23 — 全平台響應式優化
 * 目標:
 *  - ≤768px: 平板/大手機 — 雙欄改單欄、模態滿屏、表格變卡片
 *  - ≤480px: 手機 — 最小觸控目標 44px、字體 ≥16px 避免 iOS 縮放
 *  - ≤360px: 小型手機 — 極窄字體與間距進一步收斂
 * ============================================================ */

/* ── iOS 避免自動縮放: 所有 input 至少 16px ───────────────── */
@media (max-width: 768px) {
  input[type="text"],
  input[type="email"],
  input[type="password"],
  input[type="url"],
  input[type="search"],
  input[type="tel"],
  input[type="number"],
  input[type="date"],
  input[type="datetime-local"],
  input[type="time"],
  input[type="month"],
  input[type="week"],
  select,
  textarea {
    font-size: 16px !important;
  }
}

/* ── 觸控目標強化 ────────────────────────────────────────── */
@media (max-width: 768px) {
  .btn-primary,
  .btn-secondary,
  .btn-danger,
  .btn-sm,
  .btn-icon,
  .assignment-file-action,
  .modal-close,
  .ql-toolbar button,
  .pdf-tool-btn,
  .question-nav-btn,
  .activity-viewer-pdf-btn {
    min-height: 44px;
    min-width: 44px;
  }
  .btn-sm {
    padding: 0.55rem 0.9rem;
  }
  .ql-toolbar {
    flex-wrap: wrap;
    row-gap: 0.25rem;
  }
  .ql-toolbar button {
    min-width: 40px !important;
    min-height: 40px !important;
  }
}

/* ── 表格通用:手機以卡片式顯示或橫向捲動 ─────────────────── */
@media (max-width: 768px) {
  .gradebook-table-wrapper,
  .rubric-table-wrapper,
  .data-table-wrapper,
  .participants-table-wrapper,
  .badge-table-wrapper,
  .audit-log-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 10px;
  }
  .gradebook-table,
  .rubric-table,
  .data-table,
  .participants-table,
  .badge-table {
    min-width: 560px;
  }
  .gradebook-table th,
  .gradebook-table td,
  .rubric-table th,
  .rubric-table td {
    padding: 0.55rem 0.55rem;
    font-size: 0.85rem;
  }
}

/* ── Rubric 表格在小螢幕退化為卡片 ───────────────────────── */
@media (max-width: 480px) {
  .rubric-table,
  .rubric-table thead,
  .rubric-table tbody,
  .rubric-table tr,
  .rubric-table th,
  .rubric-table td {
    display: block;
    width: 100%;
  }
  .rubric-table thead {
    display: none;
  }
  .rubric-table tr {
    margin-bottom: 0.6rem;
    padding: 0.75rem;
    border: 1px solid rgba(26, 58, 92, 0.1);
    border-radius: 10px;
    background: #fff;
  }
  .rubric-table td {
    padding: 0.35rem 0;
    border: 0;
  }
  .rubric-table td::before {
    content: attr(data-label);
    font-weight: 600;
    font-size: 0.78rem;
    color: rgba(26, 58, 92, 0.6);
    display: block;
    margin-bottom: 0.25rem;
  }
}

/* ── 日曆 (Calendar) — 7 欄 grid 在手機改為列表 ───────────── */
@media (max-width: 768px) {
  .calendar-grid {
    grid-template-columns: repeat(7, minmax(38px, 1fr));
    gap: 1px;
    font-size: 0.8rem;
  }
  .calendar-day {
    min-height: 56px;
    padding: 0.3rem 0.25rem;
  }
  .calendar-header-cell {
    font-size: 0.72rem;
    padding: 0.3rem 0.2rem;
  }
  .calendar-event-chip,
  .calendar-day-event {
    font-size: 0.65rem;
    padding: 0.15rem 0.3rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}
@media (max-width: 480px) {
  .calendar-view-toolbar,
  .calendar-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }
  .calendar-view-toolbar > *,
  .calendar-toolbar > * {
    width: 100%;
    justify-content: center;
  }
  .calendar-grid {
    grid-template-columns: repeat(7, minmax(32px, 1fr));
  }
  .calendar-day {
    min-height: 48px;
    padding: 0.2rem;
  }
  .calendar-day-number {
    font-size: 0.78rem;
  }
  /* 事件只顯示小圓點,點擊天數看詳情 */
  .calendar-day-event {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    padding: 0;
    display: inline-block;
    font-size: 0;
    margin: 1px;
  }
}

/* ── 測驗作答 — 選項與版面 ──────────────────────────────── */
@media (max-width: 768px) {
  .quiz-container,
  .quiz-body {
    max-width: 100%;
  }
  .quiz-header {
    padding: 0.85rem 0.9rem 0.85rem;
    border-radius: 18px 18px 0 0;
  }
  .quiz-attempt-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
  }
  .quiz-exit-btn {
    width: 100%;
    min-height: 44px;
  }
  .quiz-exit-note {
    font-size: 0.74rem;
    text-align: left;
  }
  .quiz-header h2 {
    font-size: 1.06rem;
    line-height: 1.3;
    letter-spacing: 0;
    word-break: break-word;
    overflow-wrap: anywhere;
  }
  .quiz-progress {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 0.65rem;
    margin-top: 0.85rem;
  }
  .quiz-progress-copy {
    width: auto;
  }
  .quiz-progress-bar {
    grid-column: 1 / -1;
    flex-basis: 100%;
    min-width: 0;
    height: 8px;
  }
  .quiz-timer {
    grid-column: 2;
    grid-row: 1;
    align-self: start;
    justify-self: end;
    min-height: 38px;
    padding: 0.4rem 0.65rem;
    font-size: 0.85rem;
  }
  .quiz-autosave-status {
    min-height: 1rem;
    margin-top: 0.5rem;
    font-size: 0.74rem;
  }
  .quiz-body {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    padding: 0.85rem 0.75rem 1rem;
    border-radius: 0 0 18px 18px;
  }
  .quiz-question-panel {
    order: 3;
    padding: 1rem;
    border-radius: 16px;
  }
  .question-kicker {
    margin-bottom: 0.45rem;
    font-size: 0.68rem;
  }
  .quiz-question-part-header {
    grid-template-columns: 1fr;
    gap: 0.35rem;
    padding: 0.65rem 0.7rem;
    border-radius: 12px;
  }
  .quiz-question-part-header strong {
    font-size: 0.92rem;
  }
  .quiz-question-part-header span {
    white-space: normal;
  }
  .quiz-question-part-label {
    width: fit-content;
  }
  .question-content h3 {
    margin-bottom: 1rem;
    font-size: 1.06rem;
    line-height: 1.55;
    word-break: break-word;
    overflow-wrap: anywhere;
  }
  .quiz-question-nav-meta {
    order: 1;
    margin-top: 0;
    gap: 0.4rem;
    font-size: 0.72rem;
  }
  .quiz-nav-status-pill {
    min-height: 24px;
    padding: 0.2rem 0.48rem;
  }
  .quiz-question-nav {
    order: 2;
    display: flex;
    flex-wrap: nowrap;
    gap: 0.4rem;
    margin-top: 0;
    padding: 0.65rem 0.1rem 0.45rem;
    border-top: 0;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x proximity;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
  }
  .question-nav-btn {
    flex: 0 0 44px;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    font-size: 0.86rem;
    scroll-snap-align: start;
  }
  .quiz-navigation {
    order: 4;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.55rem;
    align-items: stretch;
    margin-top: 0;
    padding: 0.75rem 0 max(0.1rem, env(safe-area-inset-bottom));
    border-top: 1px solid rgba(15, 23, 42, 0.08);
  }
  .quiz-navigation > * {
    width: 100%;
    min-height: 48px;
  }
  .question-options {
    gap: 0.55rem;
  }
  .question-option {
    min-height: 58px;
    padding: 0.85rem 0.8rem;
    border-radius: 14px;
    align-items: flex-start;
    gap: 0.75rem;
    touch-action: manipulation;
  }
  .question-option input {
    width: 22px;
    height: 22px;
    margin-top: 0.08rem;
  }
  .question-option-text {
    font-size: 0.98rem;
    line-height: 1.55;
    word-break: break-word;
    overflow-wrap: anywhere;
  }
  .quiz-matching-row,
  .quiz-ordering-item,
  .quiz-cloze-extra {
    grid-template-columns: 1fr;
    align-items: stretch;
  }
  .quiz-ordering-item {
    grid-template-columns: auto minmax(0, 1fr);
  }
  .quiz-ordering-actions {
    grid-column: 1 / -1;
    justify-content: flex-end;
  }
  .quiz-cloze-passage {
    padding: 0.85rem;
    line-height: 2;
  }
  .quiz-cloze-input {
    width: 100%;
    margin: 0.25rem 0;
  }
}
@media (max-width: 480px) {
  .quiz-question-nav {
    max-height: none;
    overflow-y: hidden;
    padding-bottom: 0.5rem;
  }
  .question-nav-btn {
    flex-basis: 42px;
    width: 42px;
    height: 42px;
    font-size: 0.82rem;
  }
}

/* ── 作業 — 提交與評分 modal ────────────────────────────── */
@media (max-width: 768px) {
  .assignment-detail-grid,
  .assignment-panel,
  .assignment-submission-list {
    grid-template-columns: 1fr !important;
    gap: 0.75rem;
  }
  .assignment-submission-item {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }
  .assignment-submission-actions {
    flex-wrap: wrap;
    gap: 0.4rem;
  }
  .assignment-submission-actions > * {
    flex: 1 1 auto;
    min-width: 48%;
  }
  .grade-input-compact {
    width: 100%;
    min-height: 44px;
    font-size: 16px;
  }
  .grading-modal {
    gap: 0.75rem;
  }
  .grading-modal-section label {
    font-size: 0.85rem;
  }
  .rubric-grid {
    grid-template-columns: 1fr 1fr;
  }
  .assignment-form-field textarea {
    min-height: 180px;
  }
  .file-upload-area {
    padding: 1rem;
  }
}
@media (max-width: 480px) {
  .rubric-grid {
    grid-template-columns: 1fr;
  }
  .assignment-submission-actions > * {
    min-width: 100%;
  }
}

/* ── PDF 標註器 — 小螢幕全寬 ────────────────────────────── */
@media (max-width: 768px) {
  .pdf-annotator-stage {
    grid-template-columns: 1fr;
  }
  .pdf-annotator-canvas-wrap {
    max-height: 420px;
  }
  .pdf-annotator-sidebar {
    max-height: 240px;
  }
  .pdf-annotator-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 0.4rem;
  }
  .pdf-annotator-tools {
    flex-wrap: wrap;
  }
  .pdf-tool-btn {
    flex: 1 0 30%;
    min-height: 44px;
  }
}

/* ── Modal 與對話框滿屏 ────────────────────────────────── */
@media (max-width: 600px) {
  .modal-content,
  .modal-content.modal-md,
  .modal-content.modal-lg,
  .modal-content.modal-xl {
    max-width: 100vw !important;
    width: 100vw !important;
    max-height: 100vh;
    border-radius: 0;
    margin: 0;
  }
  .modal-body,
  .modal-header,
  .modal-footer {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .modal-footer {
    flex-direction: column-reverse;
    gap: 0.5rem;
    padding-bottom: calc(1rem + env(safe-area-inset-bottom));
  }
  .modal-footer > button,
  .modal-footer > .btn-primary,
  .modal-footer > .btn-secondary {
    width: 100%;
    min-height: 48px;
  }
  .modal-close {
    width: 44px;
    height: 44px;
  }
}

/* ── 表單一般性 (form-row 多欄 → 單欄) ───────────────────── */
@media (max-width: 768px) {
  .form-row,
  .form-grid,
  .activity-builder-grid,
  .quiz-create-grid,
  .stats-grid,
  .management-kv-grid,
  .courses-grid,
  .course-picker-grid,
  .builder-badge-row {
    grid-template-columns: 1fr !important;
    gap: 0.65rem !important;
  }
  .form-actions,
  .assignment-form-actions,
  .quiz-create-actions,
  .modal-footer {
    flex-direction: column;
    align-items: stretch;
  }
  .form-actions > button,
  .assignment-form-actions > button,
  .quiz-create-actions > button {
    width: 100%;
    min-height: 48px;
  }
}

/* ── 側邊導航 (課程頁面) 在窄螢幕堆疊 ────────────────────── */
@media (max-width: 900px) {
  .course-page-layout {
    grid-template-columns: 1fr !important;
    gap: 0.75rem;
  }
  .course-left-sidebar,
  .course-right-sidebar {
    position: static !important;
    max-height: none !important;
  }
  .course-main-content {
    order: 1;
  }
  .course-left-sidebar {
    order: 2;
  }
  .course-right-sidebar {
    order: 3;
  }
}

/* ── 題庫 / 角色管理 側欄折疊 ────────────────────────────── */
@media (max-width: 900px) {
  .qb-layout,
  .roles-layout {
    grid-template-columns: 1fr !important;
  }
  .qb-sidebar,
  .roles-sidebar {
    max-height: 260px;
    overflow-y: auto;
  }
}

/* ── 論壇/討論區 ───────────────────────────────────────── */
@media (max-width: 768px) {
  .forum-header,
  .discussion-list-item,
  .discussion-detail-header,
  .discussion-post-card {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }
  .discussion-post-meta {
    flex-wrap: wrap;
  }
}

/* ── Dashboard / 通知 ───────────────────────────────────── */
@media (max-width: 768px) {
  .dashboard-greeting,
  .notification-detail-hero,
  .quiz-report-hero,
  .learning-progress-hero,
  .assignment-panel-head {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }
  .quiz-report-stats,
  .notification-list {
    grid-template-columns: 1fr;
  }
}

/* ── 長字串保護 — 避免在手機上溢出 ───────────────────────── */
@media (max-width: 600px) {
  .assignment-submission-name,
  .course-card-title,
  .forum-title,
  .notification-title,
  .assignment-panel-title {
    word-break: break-word;
    overflow-wrap: anywhere;
    white-space: normal;
  }
}

/* ── 小型手機最終收斂 ──────────────────────────────────── */
@media (max-width: 360px) {
  html {
    font-size: 15px;
  }
  .btn-primary,
  .btn-secondary {
    padding: 0.7rem 1rem;
  }
  .page-title {
    font-size: 1.05rem !important;
  }
  .dashboard,
  .assignment-panel,
  .quiz-body,
  .forum-container,
  .gradebook-container {
    padding: 0.75rem !important;
  }
  .calendar-grid {
    grid-template-columns: repeat(7, minmax(28px, 1fr));
  }
  .calendar-day {
    min-height: 42px;
    padding: 0.15rem;
  }
}

/* ── iframe 容器 (H5P / SCORM / LTI / Video) ─────────────── */
@media (max-width: 768px) {
  .h5p-container,
  .scorm-container,
  .lti-launch-modal-shell,
  .activity-viewer-frame iframe,
  .interactive-video-player-frame {
    max-width: 100vw;
  }
  .h5p-container iframe,
  .scorm-container iframe {
    width: 100% !important;
    min-height: 360px;
  }
}

/* ── 平台功能手機收斂：授權表格 / Rubrics 工具列 ─────────── */
@media (max-width: 640px) {
  .license-dashboard .card-body-flush {
    padding: 0.75rem;
  }

  .license-dashboard .data-table,
  .license-dashboard .data-table thead,
  .license-dashboard .data-table tbody,
  .license-dashboard .data-table tr,
  .license-dashboard .data-table th,
  .license-dashboard .data-table td {
    display: block;
    width: 100%;
    min-width: 0;
  }

  .license-dashboard .data-table {
    border-collapse: separate;
    white-space: normal;
  }

  .license-dashboard .data-table thead {
    display: none;
  }

  .license-dashboard .data-table tbody {
    display: grid;
    gap: 0.75rem;
  }

  .license-dashboard .data-table tr {
    padding: 0.85rem;
    border: 1px solid rgba(26, 58, 92, 0.1);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 10px 22px rgba(15, 23, 42, 0.05);
  }

  .license-dashboard .data-table td {
    display: grid;
    grid-template-columns: minmax(6rem, 0.34fr) minmax(0, 1fr);
    gap: 0.75rem;
    align-items: start;
    padding: 0.55rem 0;
    border: 0;
    white-space: normal;
  }

  .license-dashboard .data-table td::before {
    content: attr(data-label);
    color: var(--gray-500);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  .license-dashboard .license-table-stack,
  .license-dashboard .license-table-title,
  .license-dashboard .license-table-subtitle,
  .license-dashboard .license-table-note {
    min-width: 0;
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .license-dashboard .license-table-action {
    width: 100%;
    min-height: 44px;
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .rubrics-container {
    padding: 1rem;
    max-width: 100%;
    overflow-x: hidden;
  }

  .rubrics-header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.9rem;
  }

  .rubrics-toolbar {
    display: grid;
    grid-template-columns: 1fr;
    width: 100%;
    min-width: 0;
  }

  .rubrics-toolbar .btn-primary,
  .rubrics-toolbar .btn-secondary {
    width: 100%;
    min-width: 0;
    min-height: 44px;
    justify-content: center;
    white-space: normal;
  }
}

/* ── 手機版核心工作流：精簡、單手操作、乾淨版面 ───────────── */
@media (max-width: 768px) {
  .modal-overlay {
    align-items: flex-end;
    justify-content: center;
    padding: 0;
    background: rgba(15, 23, 42, 0.34);
    backdrop-filter: blur(4px);
  }

  .modal-content,
  .modal-content.modal-md,
  .modal-content.modal-lg,
  .modal-content.modal-xl,
  .modal-content.modal-generic {
    width: 100vw !important;
    max-width: 100vw !important;
    max-height: 100dvh;
    border-radius: 22px 22px 0 0;
    border-left: 0;
    border-right: 0;
    border-bottom: 0;
    box-shadow: 0 -18px 42px rgba(15, 23, 42, 0.18);
  }

  .modal-header {
    position: sticky;
    top: 0;
    z-index: 3;
    align-items: center;
    padding: calc(0.85rem + env(safe-area-inset-top)) 1rem 0.85rem;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(14px);
  }

  .modal-kicker,
  .modal-description,
  .quiz-create-card-note,
  .activity-type-card p {
    display: none;
  }

  .modal-title,
  .modal-header h3 {
    font-size: 1.08rem;
    line-height: 1.35;
  }

  .modal-close {
    width: 44px;
    height: 44px;
  }

  .modal-body,
  .modal-scroll-body {
    max-height: none;
    min-height: 0;
    padding: 0.9rem 0.9rem calc(1rem + env(safe-area-inset-bottom));
  }

  .modal-workspace .activity-builder-grid,
  .modal-workspace .form-row,
  .quiz-create-grid {
    grid-template-columns: 1fr;
  }

  .modal-footer,
  .modal-content .form-actions,
  .modal-content .assignment-form-actions,
  .modal-content .quiz-create-actions {
    position: sticky;
    bottom: 0;
    z-index: 2;
    margin: 0 -0.9rem;
    padding: 0.75rem 0.9rem calc(0.75rem + env(safe-area-inset-bottom));
    background: rgba(255, 255, 255, 0.96);
    border-top: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 -10px 24px rgba(15, 23, 42, 0.06);
  }

  .modal-footer > button,
  .modal-content .form-actions > button,
  .modal-content .assignment-form-actions > button,
  .modal-content .quiz-create-actions > button,
  .qb-actions > button,
  .qb-search .btn-search {
    width: 100%;
    min-height: 48px;
    justify-content: center;
  }

  .quiz-create-shell,
  .activity-builder-shell,
  .builder-question-list,
  .quiz-bank-list,
  .bulk-import-preview-list,
  .qb-main,
  .qb-list {
    gap: 0.72rem;
  }

  .quiz-create-card,
  .builder-question-card,
  .quiz-bank-item,
  .bulk-import-preview-item,
  .qb-sidebar-card,
  .qb-search-shell,
  .question-card {
    border-radius: 16px;
    padding: 0.85rem;
    box-shadow: none;
  }

  .quiz-create-card-head {
    margin-bottom: 0.7rem;
  }

  .quiz-create-card-title {
    font-size: 1rem;
    line-height: 1.35;
  }

  .activity-types-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.65rem;
  }

  .activity-type-card {
    min-height: 104px;
    padding: 0.85rem 0.65rem;
    border-width: 1px;
    border-radius: 16px;
  }

  .activity-type-card .type-icon {
    width: 42px;
    height: 42px;
    margin-bottom: 0.55rem;
    border-radius: 14px;
  }

  .activity-type-card span {
    margin: 0;
    font-size: 0.92rem;
    line-height: 1.35;
  }

  .activity-form-shell {
    margin-top: 0.85rem;
  }

  .builder-toolbar,
  .builder-summary-row,
  .builder-badge-row {
    gap: 0.45rem;
  }

  .bulk-import-preview-list {
    max-height: none;
    overflow: visible;
    padding-right: 0;
  }

  .builder-badge {
    max-width: 100%;
    min-height: 32px;
    padding: 0.35rem 0.58rem;
    white-space: normal;
    line-height: 1.25;
  }

  .builder-question-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .builder-question-actions .btn-sm,
  .builder-question-actions .btn-primary,
  .builder-question-actions .btn-secondary,
  .builder-question-actions .btn-danger {
    width: 100%;
    min-height: 44px;
    white-space: normal;
  }

  .builder-option-row,
  .builder-matching-row,
  .builder-ordering-row,
  .builder-cloze-row,
  .option-item,
  .matching-pair-item,
  .cloze-answer-item {
    gap: 0.55rem;
  }

  .builder-choice-row {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .builder-choice-row .correct-option-control {
    grid-column: 1 / -1;
    width: 100%;
  }

  .choice-option-item {
    flex-wrap: wrap;
  }

  .choice-option-item .correct-option-control {
    width: 100%;
  }

  .builder-option-row .btn-remove,
  .btn-remove {
    min-width: 44px;
    min-height: 44px;
  }

  .form-group label,
  .bridge-form-label {
    font-size: 0.88rem;
  }

  .form-group input,
  .form-group select,
  .form-group textarea,
  .bridge-form-control,
  .builder-option-row input[type="text"],
  .option-item input[type="text"],
  .qb-search input {
    min-height: 46px;
    font-size: 16px;
  }

  .qb-layout {
    gap: 0.85rem;
  }

  .qb-sidebar {
    order: 1;
    gap: 0.75rem;
    max-height: none;
    overflow: visible;
  }

  .qb-main {
    order: 2;
  }

  .qb-header {
    gap: 0.75rem;
    margin-bottom: 0.9rem;
  }

  .qb-actions,
  .qb-search {
    display: grid;
    grid-template-columns: 1fr;
  }

  .category-tree,
  .type-checkboxes {
    display: grid;
    gap: 0.45rem;
  }

  .question-card .question-header,
  .question-card .question-footer,
  .question-card .question-actions,
  .question-card .question-tags {
    flex-wrap: wrap;
  }

  .question-card .question-footer,
  .question-card .question-actions {
    align-items: stretch;
    gap: 0.5rem;
  }

  .question-card .question-actions .btn-sm {
    flex: 1 1 calc(50% - 0.25rem);
    min-height: 44px;
  }

  .management-table-shell {
    overflow: visible;
  }

  .responsive-card-table:not(.gradebook-table) {
    display: block;
    width: 100%;
    min-width: 0;
    border-collapse: separate;
  }

  .responsive-card-table:not(.gradebook-table) thead {
    display: none;
  }

  .responsive-card-table:not(.gradebook-table) tbody {
    display: grid;
    gap: 0.75rem;
    padding: 0.75rem;
  }

  .responsive-card-table:not(.gradebook-table) tr {
    display: grid;
    gap: 0.55rem;
    padding: 0.85rem;
    border: 1px solid rgba(26, 58, 92, 0.1);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 10px 22px rgba(15, 23, 42, 0.05);
  }

  .responsive-card-table:not(.gradebook-table) td {
    display: grid;
    grid-template-columns: minmax(5.8rem, 38%) minmax(0, 1fr);
    gap: 0.7rem;
    align-items: start;
    padding: 0;
    border: 0;
    text-align: left;
    white-space: normal;
    min-width: 0;
    overflow-wrap: anywhere;
  }

  .responsive-card-table:not(.gradebook-table) td::before {
    content: attr(data-label);
    color: var(--gray-500);
    font-size: 0.74rem;
    font-weight: 700;
    line-height: 1.35;
    text-transform: uppercase;
    letter-spacing: 0.04em;
  }

  .responsive-card-table:not(.gradebook-table) td.is-center,
  .responsive-card-table:not(.gradebook-table) th.is-center {
    text-align: left;
  }

  .gradebook-table-wrapper,
  .attempts-table-container {
    border-radius: 16px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-x: contain;
  }

  .gradebook-table-wrapper::after,
  .attempts-table-container::after {
    content: '';
    display: block;
    height: 1px;
  }
}

@media (max-width: 420px) {
  .modal-body,
  .modal-scroll-body {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }

  .activity-types-grid,
  .builder-question-actions {
    grid-template-columns: 1fr;
  }

  .activity-type-card {
    min-height: 72px;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    text-align: left;
  }

  .activity-type-card .type-icon {
    margin: 0;
  }

  .question-card .question-actions .btn-sm {
    flex-basis: 100%;
  }
}

/* ── 觸控 hover → focus/active fallback ──────────────────── */
@media (hover: none) {
  .question-option:active,
  .question-option:focus-within,
  .pdf-tool-btn:active,
  .assignment-submission-item:active {
    border-color: var(--olive, #4A7C59);
    background: rgba(74, 124, 89, 0.06);
  }
}

/* Mobile compact UX pass */
@media (max-width: 768px) {
  .moodle-course-grid,
  .bridge-class-grid,
  .management-metric-grid,
  .learning-progress-summary-grid,
  .learning-progress-course-grid,
  .quiz-report-scoreboard,
  .quiz-report-section-grid,
  .notification-message-thread-list,
  .course-activity-list {
    gap: 0.7rem;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.65rem !important;
  }

  .moodle-course-card,
  .bridge-class-card,
  .management-card,
  .course-section,
  .assignment-card,
  .quiz-card,
  .forum-card,
  .notification-center,
  .notification-message-inbox,
  .notification-message-thread,
  .learning-progress-course-card,
  .learning-progress-section,
  .activity-card,
  .resource-card {
    border-radius: 14px !important;
    box-shadow: none !important;
  }

  .moodle-course-card,
  .bridge-class-card,
  .activity-card,
  .resource-card,
  .quiz-card,
  .assignment-card {
    content-visibility: auto;
    contain-intrinsic-size: 260px;
  }

  .moodle-course-card .course-cover {
    min-height: 112px;
    padding: 0.78rem;
    gap: 0.55rem;
  }

  .moodle-course-card .course-cover-copy h3,
  .course-card-title,
  .quiz-card-title,
  .assignment-card-title,
  .forum-card-title,
  .activity-card-title,
  .resource-card-title {
    font-size: 0.98rem;
    line-height: 1.28;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .moodle-course-card .course-body {
    padding: 0.78rem;
    gap: 0.62rem;
  }

  .moodle-course-card .course-summary,
  .activity-card-desc,
  .resource-card-desc,
  .assignment-card-desc,
  .forum-card-description {
    font-size: 0.8rem;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .course-header,
  .assignment-hero,
  .quiz-report-hero,
  .learning-progress-hero,
  .learning-progress-detail-hero,
  .management-hero,
  .notification-shell-hero,
  .course-roster-hero {
    border-radius: 16px !important;
    padding: 0.95rem !important;
    margin-bottom: 0.85rem !important;
    box-shadow: none !important;
  }

  .course-header {
    padding: 0.78rem !important;
  }

  .course-header::after,
  .assignment-hero::after,
  .quiz-report-hero::after,
  .learning-progress-hero::after,
  .learning-progress-detail-hero::after {
    display: none !important;
  }

  .course-header-info h1,
  .management-title,
  .course-roster-title,
  .quiz-report-hero h2,
  .learning-progress-hero-copy h2,
  .learning-progress-detail-copy h2,
  .notification-shell-title {
    font-size: 1.16rem !important;
    line-height: 1.25;
  }

  .course-hero {
    gap: 0.5rem;
  }

  .course-header .back-btn {
    align-self: flex-start;
    max-width: 100%;
    gap: 0.35rem;
    padding: 0.46rem 0.74rem;
    border-radius: 13px;
    font-size: 0.82rem;
    line-height: 1.15;
  }

  .course-header .back-btn svg {
    width: 16px;
    height: 16px;
    flex: 0 0 auto;
  }

  .course-hero-top {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 0.42rem;
    flex-wrap: wrap;
  }

  .course-hero-badges {
    flex: 0 1 auto;
    gap: 0.42rem;
    min-width: 0;
  }

  .course-format-badge {
    display: none !important;
  }

  .course-hero-badges .course-category-badge,
  .course-hero-badges .course-hero-badge,
  .course-format-badge,
  .course-enrolled-pill {
    min-height: 28px;
    padding: 0.34rem 0.56rem;
    font-size: 0.72rem;
    line-height: 1;
  }

  .course-header-content {
    display: block;
    gap: 0.45rem;
  }

  .course-header-kicker {
    display: none;
  }

  .course-header-info h1 {
    margin-bottom: 0.32rem;
  }

  .course-header-info p {
    margin-bottom: 0.48rem;
    font-size: 0.84rem;
    line-height: 1.42;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .course-header-meta {
    display: none !important;
  }

  .course-mobile-more {
    display: block;
    margin: 0.1rem 0 0;
  }

  .course-mobile-more summary {
    display: inline-flex;
    align-items: center;
    gap: 0.42rem;
    min-height: 32px;
    padding: 0.32rem 0.56rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: rgba(255, 251, 245, 0.9);
    cursor: pointer;
    font-size: 0.74rem;
    font-weight: 800;
    list-style: none;
  }

  .course-mobile-more summary::-webkit-details-marker {
    display: none;
  }

  .course-mobile-more summary::after {
    content: "+";
    display: inline-grid;
    place-items: center;
    width: 1.15rem;
    height: 1.15rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.14);
    font-size: 0.78rem;
    line-height: 1;
  }

  .course-mobile-more[open] summary::after {
    content: "-";
  }

  .course-mobile-more summary span:last-child {
    display: inline-grid;
    place-items: center;
    min-width: 1.35rem;
    height: 1.35rem;
    padding: 0 0.32rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.16);
    color: var(--cream);
    font-size: 0.7rem;
  }

  .course-mobile-more-body {
    display: grid;
    gap: 0.48rem;
    margin-top: 0.48rem;
    padding: 0.58rem;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
  }

  .course-mobile-more-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.34rem;
  }

  .course-mobile-more-meta span {
    max-width: 100%;
    padding: 0.3rem 0.5rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 251, 245, 0.86);
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 1.1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .course-mobile-stat-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.38rem;
  }

  .course-mobile-stat {
    min-width: 0;
    padding: 0.46rem 0.42rem;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.12);
  }

  .course-mobile-stat span,
  .course-mobile-stat strong {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .course-mobile-stat span {
    color: rgba(255, 251, 245, 0.66);
    font-size: 0.66rem;
    font-weight: 800;
    letter-spacing: 0.02em;
  }

  .course-mobile-stat strong {
    margin-top: 0.16rem;
    color: var(--cream);
    font-size: 1rem;
    line-height: 1;
  }

  .course-header-stat-grid {
    display: none !important;
  }

  .course-header-actions {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.45rem;
    margin-top: 0.55rem;
  }

  .course-header-actions .btn-primary,
  .course-header-actions .btn-secondary {
    min-width: 0;
    min-height: 38px !important;
    padding: 0.48rem 0.58rem !important;
    border-radius: 13px !important;
    font-size: 0.78rem !important;
    white-space: nowrap;
  }

  .course-header-actions svg {
    width: 16px;
    height: 16px;
  }

  .course-nav-tabs {
    padding: 0.35rem;
    gap: 0.25rem;
    border-radius: 14px;
    margin-bottom: 0.75rem;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
  }

  .course-nav-tabs .nav-tab {
    min-width: max-content;
    padding: 0.5rem 0.7rem;
    border-radius: 10px;
    font-size: 0.78rem;
    white-space: nowrap;
  }

  .section-header,
  .course-roster-card-head,
  .management-header,
  .assignment-card-head,
  .quiz-card-head,
  .forum-header-top,
  .notification-center .notification-header,
  .learning-progress-section-head {
    padding: 0.78rem !important;
    gap: 0.55rem !important;
  }

  .course-section .section-content,
  .course-roster-card-body,
  .management-card-body,
  .notification-center .notification-list,
  .assignment-card-body,
  .quiz-card-body,
  .forum-card-body {
    padding: 0.78rem !important;
  }

  .btn-primary,
  .btn-secondary,
  .btn-danger,
  .btn-sm,
  .bridge-primary-btn,
  .bridge-secondary-btn,
  .bridge-detail-icon-btn,
  .forum-header-btn,
  .activity-card-open-btn,
  .assignment-file-action,
  .activity-viewer-link,
  .resource-open-link {
    min-height: 40px !important;
    min-width: 40px !important;
    padding: 0.48rem 0.72rem !important;
    border-radius: 10px !important;
    font-size: 0.84rem !important;
    line-height: 1.2 !important;
    box-shadow: none !important;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .btn-icon,
  .modal-close,
  .bridge-detail-icon-btn,
  .question-nav-btn,
  .activity-viewer-close,
  .activity-viewer-pdf-btn {
    min-width: 40px !important;
    min-height: 40px !important;
  }

  .modal-content,
  .modal-content.modal-generic,
  .modal-content.modal-md,
  .modal-content.modal-lg,
  .modal-content.modal-xl {
    border-radius: 16px 16px 0 0 !important;
  }

  .modal-header {
    padding: calc(0.62rem + env(safe-area-inset-top)) 0.78rem 0.62rem !important;
  }

  .modal-title,
  .modal-header h3 {
    font-size: 1rem !important;
    line-height: 1.25 !important;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .modal-body,
  .modal-scroll-body {
    padding: 0.72rem 0.72rem calc(0.85rem + env(safe-area-inset-bottom)) !important;
  }

  .modal-footer {
    flex-direction: row !important;
    flex-wrap: wrap !important;
    align-items: center !important;
    gap: 0.5rem !important;
    padding: 0.65rem 0.72rem calc(0.65rem + env(safe-area-inset-bottom)) !important;
  }

  .modal-footer > button,
  .modal-footer > .btn-primary,
  .modal-footer > .btn-secondary {
    width: auto !important;
    flex: 1 1 calc(50% - 0.25rem);
  }

  .activity-viewer-overlay,
  .activity-viewer-overlay--compact {
    padding: 0 !important;
    background: #e5e7eb !important;
    backdrop-filter: none !important;
    align-items: stretch !important;
    justify-content: stretch !important;
    overscroll-behavior: contain;
  }

  .activity-viewer-shell,
  .activity-viewer-overlay--compact .activity-viewer-shell {
    width: 100% !important;
    height: 100dvh !important;
    max-height: 100dvh !important;
    border: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    background: #e5e7eb !important;
  }

  .activity-viewer-header,
  .activity-viewer-overlay--compact .activity-viewer-header {
    flex-direction: row !important;
    align-items: center !important;
    gap: 0.55rem !important;
    padding: calc(env(safe-area-inset-top, 0px) + 0.55rem) 0.7rem 0.55rem !important;
    background: rgba(255, 255, 255, 0.98) !important;
  }

  .activity-viewer-title-block {
    min-width: 0;
  }

  .activity-viewer-title-block h3 {
    font-size: 0.98rem !important;
    line-height: 1.2 !important;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .activity-viewer-title-block p {
    display: none !important;
  }

  .activity-viewer-body,
  .activity-viewer-overlay--compact .activity-viewer-body {
    padding: 0 !important;
    background: #e5e7eb !important;
  }

  .activity-viewer-frame,
  .activity-viewer-overlay--compact .activity-viewer-frame {
    min-height: 0 !important;
    border: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
  }

  .activity-viewer-pdf-toolbar,
  .activity-viewer-overlay--compact .activity-viewer-pdf-toolbar {
    position: sticky;
    top: 0;
    z-index: 2;
    flex-wrap: nowrap !important;
    gap: 0.4rem !important;
    padding: 0.45rem 0.55rem !important;
    background: rgba(255, 255, 255, 0.98) !important;
  }

  .activity-viewer-pdf-toolbar-group,
  .activity-viewer-overlay--compact .activity-viewer-pdf-toolbar-group {
    gap: 0.3rem !important;
    min-width: 0;
  }

  .activity-viewer-pdf-btn,
  .activity-viewer-overlay--compact .activity-viewer-pdf-btn {
    width: 36px !important;
    height: 36px !important;
    min-width: 36px !important;
    min-height: 36px !important;
    border-radius: 10px !important;
    font-size: 1.1rem !important;
  }

  .activity-viewer-pdf-fit,
  .activity-viewer-overlay--compact .activity-viewer-pdf-fit {
    height: 36px !important;
    min-height: 36px !important;
    padding: 0 0.58rem !important;
    border-radius: 10px !important;
    font-size: 0.76rem !important;
  }

  .activity-viewer-pdf-scale,
  .activity-viewer-overlay--compact .activity-viewer-pdf-scale {
    min-width: 3rem;
    font-size: 0.78rem;
    text-align: center;
    font-variant-numeric: tabular-nums;
  }

  .activity-viewer-pdf-pages,
  .activity-viewer-overlay--compact .activity-viewer-pdf-pages {
    margin-left: auto;
    font-size: 0.78rem;
    white-space: nowrap;
  }

  .activity-viewer-pdf-canvas-wrap,
  .activity-viewer-overlay--compact .activity-viewer-pdf-canvas-wrap {
    align-items: stretch !important;
    gap: 0.45rem !important;
    padding: 0.35rem 0 !important;
    background: #e5e7eb !important;
  }

  .activity-viewer-pdf-page,
  .activity-viewer-overlay--compact .activity-viewer-pdf-page {
    width: 100% !important;
    padding: 0.25rem !important;
    border: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
  }

  .activity-viewer-pdf-page-label {
    margin: 0.18rem 0.35rem 0.35rem !important;
    font-size: 0.72rem !important;
  }

  .activity-viewer-footer,
  .activity-viewer-overlay--compact .activity-viewer-footer {
    flex-direction: row !important;
    align-items: center !important;
    gap: 0.55rem !important;
    padding: 0.55rem 0.7rem calc(0.55rem + env(safe-area-inset-bottom, 0px)) !important;
    background: rgba(255, 255, 255, 0.98) !important;
  }

  .notification-center .notification-item,
  .notification-message-thread,
  .notification-message-inbox {
    border-radius: 14px;
    box-shadow: none;
  }

  .notification-center .notification-item {
    padding: 0.75rem;
    gap: 0.65rem;
  }

  .notification-center .notification-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
  }

  .notification-content .title,
  .notification-content .message,
  .notification-message-thread-copy p,
  .management-subtitle,
  .course-roster-subtitle {
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .management-copy,
  .participants-directory-desc,
  .course-roster-copy,
  .notification-shell-desc,
  .learning-progress-course-desc,
  .forum-card-description,
  .mobile-compact-hide {
    display: none !important;
  }
}

@media (max-width: 420px) {
  .moodle-course-grid,
  .bridge-class-grid,
  .management-metric-grid,
  .learning-progress-summary-grid,
  .learning-progress-course-grid,
  .quiz-report-scoreboard,
  .quiz-report-section-grid {
    gap: 0.58rem;
  }

  .course-header,
  .assignment-hero,
  .quiz-report-hero,
  .learning-progress-hero,
  .learning-progress-detail-hero,
  .management-hero,
  .notification-shell-hero,
  .course-roster-hero {
    padding: 0.82rem !important;
  }

  .section-header,
  .course-roster-card-head,
  .management-header,
  .assignment-card-head,
  .quiz-card-head,
  .forum-header-top,
  .notification-center .notification-header {
    padding: 0.7rem !important;
  }

  .course-section .section-content,
  .course-roster-card-body,
  .management-card-body,
  .notification-center .notification-list,
  .assignment-card-body,
  .quiz-card-body,
  .forum-card-body {
    padding: 0.7rem !important;
  }

  .course-nav-tabs .nav-tab {
    padding: 0.46rem 0.62rem;
    font-size: 0.76rem;
  }

  .btn-primary,
  .btn-secondary,
  .btn-danger,
  .btn-sm,
  .bridge-primary-btn,
  .bridge-secondary-btn,
  .forum-header-btn,
  .activity-card-open-btn {
    padding-left: 0.62rem !important;
    padding-right: 0.62rem !important;
  }
}

/* Mobile notification center and compact page navigation */
@media (max-width: 768px) {
  .activity-shell {
    gap: 0.65rem;
  }

  .activity-shell-header {
    padding: 0.72rem 1rem 0.25rem !important;
    flex-direction: row !important;
    align-items: flex-start !important;
    justify-content: space-between;
    gap: 0.65rem !important;
  }

  .activity-shell-heading {
    min-width: 0;
    flex: 1 1 auto;
    display: grid !important;
    grid-template-columns: 40px minmax(0, 1fr);
    align-items: start !important;
    gap: 0.58rem !important;
  }

  .activity-back-btn {
    width: 40px !important;
    height: 40px !important;
    min-width: 40px !important;
    min-height: 40px !important;
    flex: 0 0 40px !important;
    padding: 0 !important;
    border-radius: 999px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
  }

  .activity-back-btn svg {
    width: 18px;
    height: 18px;
  }

  .activity-shell-copy {
    min-width: 0;
  }

  .activity-shell-copy h2 {
    font-size: 1.14rem !important;
    line-height: 1.24 !important;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .activity-shell-copy p {
    margin-top: 0.2rem !important;
    font-size: 0.82rem !important;
    line-height: 1.35 !important;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .activity-shell-meta {
    margin-top: 0.48rem !important;
    gap: 0.38rem !important;
  }

  .activity-chip {
    padding: 0.26rem 0.58rem !important;
    font-size: 0.76rem !important;
    line-height: 1.1 !important;
  }

  .activity-shell-header > .btn-primary {
    flex: 0 0 auto;
    max-width: 46%;
  }

  .management-back-link {
    min-height: 36px;
    padding: 0.35rem 0.62rem;
    border-radius: 999px;
    background: rgba(26, 58, 92, 0.06);
    color: var(--olive-deep);
    font-size: 0.78rem;
    line-height: 1;
  }

  .management-back-link svg {
    width: 15px;
    height: 15px;
  }

  .notification-center {
    background: transparent !important;
    border: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    overflow: visible !important;
  }

  .notification-center::before {
    display: none !important;
  }

  .notification-center .notification-header {
    padding: 0.55rem 0.1rem 0.65rem !important;
    border-bottom: 0 !important;
    flex-direction: column !important;
    align-items: stretch !important;
    justify-content: flex-start !important;
    gap: 0.55rem !important;
  }

  .notification-page-header {
    padding: 0.55rem 0.1rem 0.65rem !important;
    border-bottom: 0 !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.55rem !important;
  }

  .notification-shell-copy {
    min-width: 0;
    gap: 0 !important;
  }

  .notification-center .notification-header h2,
  .notification-page-header h2,
  .notification-shell-desc {
    display: none !important;
  }

  .notification-shell-kicker {
    font-size: 0.82rem !important;
    letter-spacing: 0.03em !important;
    color: var(--gray-600) !important;
  }

  .notification-page-actions {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    width: 100% !important;
    gap: 0.48rem !important;
  }

  .notification-page-action {
    width: 100% !important;
    min-height: 40px !important;
    padding: 0.48rem 0.55rem !important;
    border-radius: 999px !important;
    font-size: 0.82rem !important;
    box-shadow: none !important;
  }

  .notification-center .notification-actions {
    width: 100% !important;
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    flex: 1 1 auto;
    flex-wrap: unset !important;
    gap: 0.45rem !important;
    justify-content: stretch !important;
    padding: 0.24rem !important;
    border-radius: 16px !important;
  }

  .notification-center .notification-actions .btn-secondary {
    min-height: 36px !important;
    min-width: 0 !important;
    width: 100% !important;
    padding: 0.42rem 0.58rem !important;
    border-radius: 13px !important;
    font-size: 0.74rem !important;
  }

  .notification-center .notification-actions .btn-secondary:only-child {
    grid-column: 1 / -1;
  }

  .notification-message-inbox {
    margin: 0 0 0.65rem !important;
    padding: 0.72rem !important;
    border-radius: 16px !important;
  }

  .notification-message-inbox-head {
    margin-bottom: 0.55rem !important;
    flex-direction: row !important;
    align-items: center !important;
    gap: 0.65rem !important;
  }

  .notification-message-inbox-head h3 {
    margin-top: 0.12rem !important;
    font-size: 0.95rem !important;
  }

  .participants-directory-count {
    padding: 0.28rem 0.58rem !important;
    font-size: 0.74rem !important;
    white-space: nowrap;
  }

  .notification-message-thread-list {
    gap: 0.48rem !important;
  }

  .notification-message-thread {
    grid-template-columns: 34px minmax(0, 1fr) auto !important;
    gap: 0.55rem !important;
    align-items: center !important;
    padding: 0.62rem !important;
    border-radius: 13px !important;
  }

  .notification-message-thread-avatar {
    width: 34px !important;
    height: 34px !important;
    border-radius: 11px !important;
    font-size: 0.82rem !important;
  }

  .notification-message-thread-title-row {
    gap: 0.5rem !important;
  }

  .notification-message-thread-title-row strong {
    font-size: 0.92rem !important;
  }

  .notification-message-thread-title-row span,
  .notification-message-thread-course {
    font-size: 0.72rem !important;
  }

  .notification-message-thread-copy p {
    margin-top: 0.16rem !important;
    font-size: 0.82rem !important;
    line-height: 1.3 !important;
  }

  .notification-message-unread {
    grid-column: auto !important;
    min-width: 24px !important;
    height: 24px !important;
    justify-self: end !important;
    font-size: 0.68rem !important;
  }

  .notification-read-thread-archive {
    margin: 0.55rem 0 0 !important;
    border-radius: 15px !important;
  }

  .notification-read-thread-archive summary {
    padding: 0.62rem 0.72rem !important;
    font-size: 0.86rem !important;
  }

  .notification-read-thread-list {
    gap: 0.4rem !important;
    padding: 0 0.58rem 0.58rem !important;
  }

  .notification-read-thread {
    grid-template-columns: 30px minmax(0, 1fr) auto !important;
    padding: 0.52rem !important;
    gap: 0.52rem !important;
    border-radius: 12px !important;
  }

  .notification-read-thread-avatar {
    width: 30px !important;
    height: 30px !important;
    border-radius: 9px !important;
    font-size: 0.78rem !important;
  }

  .notification-read-thread-copy strong {
    font-size: 0.84rem !important;
  }

  .notification-read-thread-copy small,
  .notification-read-thread time {
    font-size: 0.68rem !important;
  }

  .notification-center .notification-list {
    max-height: none !important;
    overflow: visible !important;
    padding: 0 !important;
    gap: 0.55rem !important;
  }

  .notification-center .notification-item {
    padding: 0.68rem !important;
    gap: 0.58rem !important;
    border-radius: 14px !important;
  }

  .notification-center .notification-item.unread::before {
    top: 8px !important;
    bottom: 8px !important;
    width: 3px !important;
  }

  .notification-center .notification-icon {
    width: 34px !important;
    height: 34px !important;
    border-radius: 10px !important;
  }

  .notification-center .notification-icon svg {
    width: 16px;
    height: 16px;
  }

  .notification-card-head {
    flex-direction: row !important;
    gap: 0.45rem !important;
  }

  .notification-card-chip {
    display: none !important;
  }

  .notification-content .title {
    margin-bottom: 0.1rem !important;
    font-size: 0.94rem !important;
    line-height: 1.22 !important;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    white-space: normal !important;
  }

  .notification-content .message {
    font-size: 0.82rem !important;
    line-height: 1.35 !important;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    white-space: normal !important;
  }

  .notification-content .time {
    margin-top: 0.3rem !important;
    padding: 0.17rem 0.48rem !important;
    font-size: 0.68rem !important;
  }

  .notification-detail-hero,
  .course-message-thread-head {
    border-radius: 16px !important;
    padding: 0.78rem !important;
    gap: 0.65rem !important;
  }

  .notification-detail-icon,
  .notification-message-thread-avatar.large {
    width: 42px !important;
    height: 42px !important;
    border-radius: 13px !important;
  }

  .notification-detail-title,
  .course-message-thread-head h3 {
    font-size: 1rem !important;
    line-height: 1.25 !important;
  }

  .notification-detail-message {
    margin-top: 0.32rem !important;
    font-size: 0.84rem !important;
    line-height: 1.45 !important;
  }

  .course-message-thread-messages {
    max-height: 42vh !important;
    border-radius: 16px !important;
  }

  .course-message-bubble {
    max-width: 94% !important;
    padding: 0.72rem 0.82rem !important;
    border-radius: 15px !important;
  }
}

@media (max-width: 420px) {
  .activity-shell-header {
    padding-left: 0.75rem !important;
    padding-right: 0.75rem !important;
  }

  .activity-shell-heading {
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 0.5rem !important;
  }

  .activity-back-btn {
    width: 38px !important;
    height: 38px !important;
    min-width: 38px !important;
    min-height: 38px !important;
  }

  .activity-shell-copy h2 {
    font-size: 1.06rem !important;
  }

  .activity-shell-copy p {
    font-size: 0.78rem !important;
  }

  .notification-center .notification-actions .btn-secondary {
    padding-left: 0.48rem !important;
    padding-right: 0.48rem !important;
  }
}

/* Mobile roster and score tables */
@media (max-width: 768px) {
  .course-roster-workspace {
    max-width: none !important;
    gap: 0.8rem !important;
  }

  .course-roster-toolbar {
    flex-direction: row !important;
    align-items: center !important;
    gap: 0.6rem !important;
  }

  .course-roster-toolbar .management-inline-actions {
    flex: 0 0 auto;
  }

  .course-roster-toolbar .bridge-secondary-btn {
    min-height: 36px;
    padding: 0.45rem 0.68rem;
    border-radius: 999px;
    font-size: 0.78rem;
    white-space: nowrap;
  }

  .course-roster-hero {
    padding: 1rem !important;
    border-radius: 18px !important;
  }

  .course-roster-title {
    font-size: 1.26rem !important;
    line-height: 1.22 !important;
  }

  .course-roster-copy {
    margin-top: 0.35rem !important;
    font-size: 0.82rem !important;
    line-height: 1.42 !important;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .course-hero-badges {
    gap: 0.38rem !important;
  }

  .course-hero-badge {
    padding: 0.25rem 0.52rem !important;
    font-size: 0.72rem !important;
    line-height: 1.15 !important;
  }

  .course-roster-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.55rem !important;
  }

  .course-roster-metrics .management-metric-card {
    padding: 0.75rem !important;
    border-radius: 14px !important;
  }

  .course-roster-metrics .management-metric-value {
    font-size: 1.18rem !important;
  }

  .course-roster-metrics .management-metric-label,
  .course-roster-metrics .management-metric-helper {
    font-size: 0.72rem !important;
    line-height: 1.28 !important;
  }

  .course-roster-main-card,
  .course-roster-side-card,
  .gradebook-shell {
    border-radius: 18px !important;
  }

  .course-roster-card-head {
    padding: 0.9rem 0.9rem 0.35rem !important;
    flex-direction: row !important;
    align-items: center !important;
  }

  .course-roster-card-head .management-title {
    font-size: 1rem !important;
  }

  .course-roster-card-head .management-copy {
    display: none !important;
  }

  .course-roster-card-body {
    padding: 0.55rem 0.72rem 0.78rem !important;
  }

  .course-roster-main-card .participants-table-shell,
  .participants-table-shell {
    overflow: visible !important;
    padding: 0 !important;
    border: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
  }

  .course-roster-main-card .participants-table,
  .participants-table {
    display: block !important;
    width: 100% !important;
    min-width: 0 !important;
    margin: 0 !important;
    table-layout: auto !important;
    border-spacing: 0 !important;
  }

  .course-roster-main-card .participants-table thead,
  .participants-table thead {
    display: none !important;
  }

  .course-roster-main-card .participants-table tbody,
  .participants-table tbody {
    display: grid !important;
    gap: 0.62rem !important;
  }

  .course-roster-main-card .participants-table tr.participant-row,
  .participants-table tr.participant-row {
    display: grid !important;
    gap: 0.18rem !important;
    padding: 0.78rem !important;
    border: 1px solid rgba(26, 58, 92, 0.1) !important;
    border-radius: 16px !important;
    background: rgba(255, 255, 255, 0.96) !important;
    box-shadow: 0 8px 18px rgba(15, 23, 42, 0.045) !important;
  }

  .course-roster-main-card .participants-table td,
  .participants-table td {
    position: static !important;
    z-index: auto !important;
    width: auto !important;
    min-width: 0 !important;
    display: grid !important;
    grid-template-columns: minmax(5.6rem, 34%) minmax(0, 1fr) !important;
    gap: 0.65rem !important;
    align-items: center !important;
    padding: 0.42rem 0 !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
    text-align: left !important;
    white-space: normal !important;
    overflow-wrap: normal !important;
  }

  .course-roster-main-card .participants-table td::before,
  .participants-table td::before {
    content: attr(data-label);
    min-width: 0;
    color: var(--gray-500);
    font-size: 0.68rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }

  .course-roster-main-card .participants-table td:first-child,
  .participants-table td:first-child {
    display: block !important;
    padding: 0 0 0.5rem !important;
    border-bottom: 1px solid rgba(26, 58, 92, 0.08) !important;
  }

  .course-roster-main-card .participants-table td:first-child::before,
  .participants-table td:first-child::before {
    display: none !important;
  }

  .participants-table .user-cell,
  .participants-table .participant-meta-stack,
  .participants-table .participant-date-stack {
    min-width: 0 !important;
  }

  .participants-table .user-avatar {
    width: 38px !important;
    height: 38px !important;
    flex: 0 0 38px !important;
  }

  .participants-table .participant-name-stack strong,
  .participants-table .participant-name-stack span,
  .participants-table .participant-meta-stack > span:first-child,
  .participants-table .participant-date-stack strong,
  .participants-table .participant-date-stack span {
    max-width: 100% !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
  }

  .participants-table .participant-name-stack strong {
    font-size: 0.95rem !important;
  }

  .participants-table .participant-name-stack span,
  .participants-table .participant-meta-stack span,
  .participants-table .participant-date-stack span {
    font-size: 0.76rem !important;
  }

  .participants-table .participant-role-chip {
    width: max-content;
    max-width: 100%;
    padding: 0.25rem 0.55rem !important;
    font-size: 0.68rem !important;
  }

  .participants-table .participant-progress-cell {
    min-width: 0 !important;
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) auto;
    width: 100%;
  }

  .participants-table .mini-progress {
    width: 100% !important;
    flex-basis: auto !important;
  }

  .participants-table .participants-actions-cell {
    width: auto !important;
    min-width: 0 !important;
    padding-top: 0.55rem !important;
    border-top: 1px solid rgba(26, 58, 92, 0.08) !important;
  }

  .participants-table .participant-row-actions {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    justify-content: stretch !important;
    gap: 0.5rem !important;
  }

  .participants-table .participant-row-actions .btn-sm {
    width: 100% !important;
    min-height: 40px !important;
    border-radius: 13px !important;
  }

  .teacher-gradebook {
    gap: 0.8rem !important;
  }

  .teacher-gradebook .gradebook-shell {
    padding: 0.9rem !important;
    height: auto !important;
    max-height: none !important;
    overflow: visible !important;
  }

  .teacher-gradebook .gradebook-shell-head {
    margin-bottom: 0.55rem !important;
  }

  .teacher-gradebook .gradebook-shell-title {
    font-size: 1rem !important;
  }

  .teacher-gradebook .gradebook-shell-desc {
    font-size: 0.78rem !important;
    line-height: 1.35 !important;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .teacher-gradebook .gradebook-table-wrapper {
    margin: 0 !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
    max-height: none !important;
    overflow: visible !important;
  }

  #moodleGradebookView,
  #moodleGradebookView #gradebookContent,
  #moodleGradebookView .teacher-gradebook,
  #moodleGradebookView .student-grades,
  #moodleGradebookView .student-grades .gradebook-shell,
  #moodleGradebookView .student-grades .gradebook-table-wrapper,
  #moodleGradebookView .student-grades .gradebook-table,
  #moodleGradebookView .student-grades .gradebook-table tbody,
  #moodleGradebookView .teacher-score-table,
  #moodleGradebookView .teacher-score-table tbody {
    height: auto !important;
    max-height: none !important;
    min-height: 0 !important;
    overflow: visible !important;
  }

  /* student grades: ensure container can extend, no clipping at any layer */
  #moodleGradebookView:not([hidden]) {
    display: block !important;
  }
  #moodleGradebookView .student-grades {
    display: flex !important;
    flex-direction: column !important;
  }

  .teacher-score-table {
    display: block !important;
    width: 100% !important;
    min-width: 0 !important;
    border-collapse: separate !important;
  }

  .teacher-score-table thead {
    display: none !important;
  }

  .teacher-score-table tbody {
    display: grid !important;
    gap: 0.62rem !important;
  }

  .teacher-score-table tr {
    display: grid !important;
    gap: 0.18rem !important;
    padding: 0.78rem !important;
    border: 1px solid rgba(26, 58, 92, 0.1) !important;
    border-radius: 16px !important;
    background: rgba(255, 255, 255, 0.96) !important;
    box-shadow: 0 8px 18px rgba(15, 23, 42, 0.045) !important;
  }

  .teacher-score-table td {
    position: static !important;
    display: grid !important;
    grid-template-columns: minmax(7rem, 44%) minmax(0, 1fr) !important;
    gap: 0.6rem !important;
    align-items: center !important;
    padding: 0.42rem 0 !important;
    border: 0 !important;
    background: transparent !important;
    text-align: right !important;
    min-width: 0 !important;
  }

  .teacher-score-table td::before {
    content: attr(data-label);
    text-align: left;
    color: var(--gray-500);
    font-size: 0.72rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: 0.04em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .teacher-score-table td.sticky-col {
    display: block !important;
    padding-bottom: 0.55rem !important;
    border-bottom: 1px solid rgba(26, 58, 92, 0.08) !important;
    text-align: left !important;
  }

  .teacher-score-table td.sticky-col::before {
    display: none !important;
  }

  .teacher-score-table .student-info {
    min-width: 0;
  }

  .teacher-score-table .student-info > div:last-child {
    min-width: 0;
  }

  .teacher-score-table .student-info strong,
  .teacher-score-table .student-info small {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .teacher-score-table .grade-cell {
    font-size: 0.9rem;
  }

  .teacher-score-table .grade-cell-content {
    justify-content: flex-end;
  }

  .teacher-score-table .grade-cell-reset-btn {
    padding: 0.32rem 0.52rem;
  }

  .teacher-score-table .total-cell {
    margin-top: 0.35rem;
    padding: 0.5rem 0.6rem !important;
    border-radius: 12px !important;
    background: rgba(45, 43, 107, 0.06) !important;
  }

  .forum-back-btn,
  .video-player-back-btn,
  .assignment-back-btn {
    width: auto !important;
    min-width: 40px !important;
    min-height: 40px !important;
    padding: 0.5rem 0.7rem !important;
    border-radius: 999px !important;
    white-space: nowrap !important;
  }
}

@media (max-width: 420px) {
  .course-roster-card-body {
    padding-left: 0.58rem !important;
    padding-right: 0.58rem !important;
  }

  .course-roster-metrics {
    grid-template-columns: 1fr !important;
  }

  .course-roster-main-card .participants-table td,
  .participants-table td,
  .teacher-score-table td {
    grid-template-columns: minmax(5.2rem, 36%) minmax(0, 1fr) !important;
    gap: 0.55rem !important;
  }

  .participants-table .participant-row-actions {
    grid-template-columns: 1fr 1fr;
  }
}

/* Course message modal polish */
.course-message-modal {
  --course-message-border: rgba(26, 58, 92, 0.1);
  --course-message-soft: rgba(248, 245, 239, 0.88);
}

.course-message-modal .modal-header {
  padding: 1.35rem 1.55rem 1.1rem;
  border-bottom: 1px solid rgba(26, 58, 92, 0.1);
  background:
    radial-gradient(circle at 100% 0%, rgba(86, 121, 96, 0.12), transparent 30%),
    linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,250,252,0.94));
}

.course-message-modal .modal-title {
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  letter-spacing: 0;
}

.course-message-modal .modal-description {
  max-width: 46rem;
  color: var(--gray-500);
}

.course-message-modal .modal-scroll-body {
  padding: 1.05rem 1.35rem 1.35rem;
  background:
    linear-gradient(180deg, rgba(248,250,252,0.88), rgba(255,251,245,0.78));
}

.course-message-thread-shell {
  gap: 0.9rem;
}

.course-message-thread-head {
  padding: 0.95rem 1.05rem;
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.96), rgba(248,245,239,0.9));
  border-color: rgba(212, 197, 169, 0.42);
  box-shadow: 0 12px 26px rgba(15, 23, 42, 0.05);
}

.course-message-thread-copy {
  min-width: 0;
}

.course-message-thread-copy h3,
.course-message-thread-copy p {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-message-thread-messages {
  min-height: 180px;
  max-height: min(48vh, 430px);
  padding: 1rem;
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.96), rgba(248,250,252,0.92));
  border-color: rgba(26, 58, 92, 0.1);
}

.course-message-bubble {
  max-width: min(72%, 520px);
  padding: 0.82rem 0.95rem;
  border-radius: 18px;
  border-color: rgba(26, 58, 92, 0.1);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.06);
}

.course-message-row.is-mine .course-message-bubble {
  background: linear-gradient(135deg, #243a6b 0%, #2d2b6b 100%);
  color: #ffffff;
  box-shadow: 0 14px 24px rgba(36, 58, 107, 0.2);
}

.course-message-meta {
  align-items: baseline;
  gap: 0.55rem;
  margin-bottom: 0.42rem;
}

.course-message-meta strong {
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}

.course-message-meta span {
  font-size: 0.74rem;
  white-space: nowrap;
}

.course-message-reply-form {
  gap: 0.65rem;
  padding: 0.9rem;
  border-radius: 18px;
  border: 1px solid rgba(26, 58, 92, 0.1);
  background: rgba(255,255,255,0.96);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.06);
}

.course-message-reply-label {
  color: var(--charcoal);
  font-weight: 800;
  font-size: 0.9rem;
}

.course-message-textarea {
  min-height: 104px;
  padding: 0.85rem 0.95rem;
  border: 1px solid rgba(26, 58, 92, 0.16);
  border-radius: 14px;
  background: rgba(248,250,252,0.72);
  color: var(--charcoal);
  font: inherit;
  line-height: 1.55;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.course-message-textarea:focus {
  outline: none;
  border-color: rgba(45, 43, 107, 0.42);
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(45, 43, 107, 0.08);
}

.course-message-reply-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.9rem;
  padding-top: 0.15rem;
}

.course-message-reply-actions > span {
  color: var(--gray-500);
  font-size: 0.78rem;
  font-weight: 700;
}

.course-message-reply-actions > div {
  display: flex;
  gap: 0.6rem;
  align-items: center;
}

.course-message-modal .notification-detail-actions {
  margin-top: 0.2rem;
}

@media (max-width: 768px) {
  .course-message-modal .modal-header {
    padding: 1rem 1rem 0.85rem !important;
  }

  .course-message-modal .modal-scroll-body {
    padding: 0.8rem !important;
  }

  .course-message-thread-head {
    padding: 0.75rem !important;
    border-radius: 15px !important;
  }

  .course-message-thread-messages {
    min-height: 170px;
    max-height: 42vh !important;
    padding: 0.75rem !important;
    border-radius: 15px !important;
  }

  .course-message-bubble {
    max-width: 88% !important;
    padding: 0.72rem 0.78rem !important;
    border-radius: 15px !important;
  }

  .course-message-meta {
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 0.28rem 0.55rem;
  }

  .course-message-reply-form {
    padding: 0.72rem;
    border-radius: 15px;
  }

  .course-message-textarea {
    min-height: 92px;
    padding: 0.75rem;
    border-radius: 13px;
  }

  .course-message-reply-actions {
    align-items: stretch;
    flex-direction: column;
    gap: 0.55rem;
  }

  .course-message-reply-actions > div {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.55rem;
  }

  .course-message-reply-actions .btn-primary,
  .course-message-reply-actions .btn-secondary {
    width: 100%;
    min-height: 44px;
  }
}

/* Mobile modal hardening pass: catch custom shells that are not covered by the base modal rules. */
@media (max-width: 768px) {
  .modal-overlay,
  .activity-viewer-overlay {
    align-items: flex-end !important;
    justify-content: center !important;
    padding: calc(0.55rem + env(safe-area-inset-top, 0px)) 0 0 !important;
    overflow: hidden !important;
    overscroll-behavior: contain !important;
  }

  .modal-overlay > .modal-content,
  .modal-content.modal-workspace,
  .modal-content.rubric-builder-modal,
  .modal-content.rubric-template-modal,
  .badge-detail-modal,
  .anti-cheat-settings-modal,
  .proctoring-report-modal,
  .proctoring-summary-modal,
  .audit-stats-modal,
  .report-modal,
  .scorm-modal,
  .lti-modal,
  .h5p-modal,
  .activity-viewer-shell {
    width: 100vw !important;
    max-width: 100vw !important;
    height: auto !important;
    max-height: calc(100dvh - env(safe-area-inset-top, 0px)) !important;
    margin: 0 !important;
    border-right: 0 !important;
    border-bottom: 0 !important;
    border-left: 0 !important;
    border-radius: 16px 16px 0 0 !important;
    display: flex !important;
    flex-direction: column !important;
    overflow: hidden !important;
    box-shadow: 0 -18px 42px rgba(15, 23, 42, 0.18) !important;
  }

  .modal-overlay > .modal-content .modal-header,
  .modal-content.modal-workspace .modal-header,
  .rubric-builder-modal .modal-header,
  .rubric-template-modal .modal-header,
  .badge-detail-modal .modal-header,
  .anti-cheat-settings-modal .modal-header,
  .proctoring-report-modal .modal-header,
  .proctoring-summary-modal .modal-header,
  .audit-stats-modal .modal-header,
  .report-modal .modal-header,
  .scorm-modal .modal-header,
  .lti-modal .modal-header,
  .h5p-modal .modal-header,
  .activity-viewer-header {
    position: sticky !important;
    top: 0 !important;
    z-index: 5 !important;
    min-height: 54px !important;
    padding: calc(0.62rem + env(safe-area-inset-top, 0px)) 0.78rem 0.62rem !important;
    align-items: center !important;
    background: rgba(255, 255, 255, 0.96) !important;
    backdrop-filter: blur(14px) !important;
  }

  .modal-overlay > .modal-content .modal-body,
  .modal-overlay > .modal-content .modal-scroll-body,
  .modal-content.modal-workspace .modal-body,
  .modal-content.modal-workspace .modal-scroll-body,
  .rubric-builder-modal .modal-body,
  .rubric-template-modal .modal-body,
  .badge-detail-modal .modal-body,
  .anti-cheat-settings-modal .modal-body,
  .proctoring-report-modal .modal-body,
  .proctoring-summary-modal .modal-body,
  .audit-stats-modal .modal-body,
  .report-modal .modal-body,
  .scorm-modal .modal-body,
  .lti-modal .modal-body,
  .h5p-modal .modal-body,
  .activity-viewer-body {
    flex: 1 1 auto !important;
    min-height: 0 !important;
    max-height: none !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    padding: 0.72rem 0.72rem calc(0.85rem + env(safe-area-inset-bottom, 0px)) !important;
  }

  .modal-overlay > .modal-content .modal-footer,
  .modal-content.modal-workspace .modal-footer,
  .rubric-builder-modal .modal-footer,
  .rubric-template-modal .modal-footer,
  .badge-detail-modal .modal-footer,
  .anti-cheat-settings-modal .modal-footer,
  .proctoring-report-modal .modal-footer,
  .proctoring-summary-modal .modal-footer,
  .audit-stats-modal .modal-footer,
  .report-modal .modal-footer,
  .scorm-modal .modal-actions,
  .lti-modal .modal-actions,
  .h5p-modal .modal-actions,
  .activity-viewer-footer {
    position: sticky !important;
    bottom: 0 !important;
    z-index: 4 !important;
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.5rem !important;
    padding: 0.68rem 0.72rem calc(0.68rem + env(safe-area-inset-bottom, 0px)) !important;
    border-top: 1px solid rgba(15, 23, 42, 0.08) !important;
    background: rgba(255, 255, 255, 0.96) !important;
    box-shadow: 0 -10px 24px rgba(15, 23, 42, 0.07) !important;
  }

  .modal-overlay > .modal-content .modal-footer > *,
  .modal-content.modal-workspace .modal-footer > *,
  .rubric-builder-modal .modal-footer > *,
  .rubric-template-modal .modal-footer > *,
  .badge-detail-modal .modal-footer > *,
  .anti-cheat-settings-modal .modal-footer > *,
  .proctoring-report-modal .modal-footer > *,
  .proctoring-summary-modal .modal-footer > *,
  .audit-stats-modal .modal-footer > *,
  .report-modal .modal-footer > *,
  .scorm-modal .modal-actions > *,
  .lti-modal .modal-actions > *,
  .h5p-modal .modal-actions > *,
  .activity-viewer-footer > * {
    width: 100% !important;
    min-width: 0 !important;
    min-height: 42px !important;
    justify-content: center !important;
    white-space: nowrap !important;
    touch-action: manipulation;
  }

  .modal-overlay > .modal-content .modal-title,
  .modal-overlay > .modal-content .modal-heading,
  .modal-content.modal-workspace .modal-title,
  .modal-content.modal-workspace .modal-heading,
  .activity-viewer-title-block,
  .activity-viewer-title-block h3,
  .activity-viewer-title-block p,
  .rubric-builder-modal .modal-title,
  .rubric-template-modal .modal-title {
    min-width: 0 !important;
  }

  .activity-viewer-title-block h3,
  .modal-overlay > .modal-content .modal-title,
  .modal-content.modal-workspace .modal-title,
  .rubric-builder-modal .modal-title,
  .rubric-template-modal .modal-title {
    font-size: 1rem !important;
    line-height: 1.25 !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
  }

  .activity-viewer-title-block p,
  .modal-overlay > .modal-content .modal-description,
  .modal-overlay > .modal-content .modal-kicker,
  .modal-content.modal-workspace .modal-description,
  .modal-content.modal-workspace .modal-kicker,
  .rubric-builder-modal .modal-description,
  .rubric-template-modal .modal-description,
  .notification-detail-kicker,
  .notification-detail-message {
    display: none !important;
  }

  .activity-viewer-close,
  .modal-overlay > .modal-content .modal-close,
  .modal-content.modal-workspace .modal-close {
    width: 40px !important;
    min-width: 40px !important;
    height: 40px !important;
    min-height: 40px !important;
  }

  .activity-viewer-frame,
  .activity-viewer-frame-pdf,
  .activity-viewer-pdf-canvas-wrap {
    min-height: 0 !important;
    max-height: calc(100dvh - 160px) !important;
  }

  .notification-detail-shell,
  .course-message-compose,
  .course-message-thread-shell {
    gap: 0.72rem !important;
  }

  .notification-detail-hero,
  .notification-detail-summary,
  .course-message-thread-head,
  .course-message-reply-form,
  .quiz-create-card,
  .activity-builder-shell .quiz-create-card,
  .rubric-builder-modal .rubric-criterion-card,
  .audit-stats-modal .stat-card {
    padding: 0.72rem !important;
    border-radius: 14px !important;
    box-shadow: none !important;
  }

  .notification-detail-actions {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 0.5rem !important;
  }

  .notification-detail-actions > button {
    width: 100% !important;
    min-height: 42px !important;
  }

  .modal-overlay > .modal-content .modal-footer > :only-child,
  .modal-content.modal-workspace .modal-footer > :only-child,
  .rubric-builder-modal .modal-footer > :only-child,
  .rubric-template-modal .modal-footer > :only-child,
  .badge-detail-modal .modal-footer > :only-child,
  .anti-cheat-settings-modal .modal-footer > :only-child,
  .proctoring-report-modal .modal-footer > :only-child,
  .proctoring-summary-modal .modal-footer > :only-child,
  .audit-stats-modal .modal-footer > :only-child,
  .report-modal .modal-footer > :only-child,
  .scorm-modal .modal-actions > :only-child,
  .lti-modal .modal-actions > :only-child,
  .h5p-modal .modal-actions > :only-child,
  .activity-viewer-footer > :only-child {
    grid-column: 1 / -1 !important;
  }
}

.interactive-video-mobile-status-slot,
.interactive-video-sheet-handle {
  display: none;
}

@media (max-width: 768px) {
  #interactive-video-viewer-overlay .activity-viewer-shell--interactive-video {
    width: 100vw !important;
    height: 100dvh !important;
    max-height: 100dvh !important;
    border-radius: 0 !important;
  }

  #interactive-video-viewer-overlay .activity-viewer-shell--interactive-video .activity-viewer-header {
    min-height: 50px !important;
    padding: calc(0.45rem + env(safe-area-inset-top, 0px)) 0.72rem 0.45rem !important;
  }

  #interactive-video-viewer-overlay .activity-viewer-shell--interactive-video .activity-viewer-footer {
    display: none !important;
  }

  #interactive-video-viewer-overlay .activity-viewer-body--interactive-video {
    padding: 0 !important;
    overflow-y: auto !important;
    background: linear-gradient(180deg, rgba(248, 250, 252, 0.98), rgba(244, 247, 250, 0.94));
  }

  #video-viewer-overlay.activity-viewer-overlay,
  #web-viewer-overlay.activity-viewer-overlay {
    align-items: stretch !important;
    justify-content: stretch !important;
    padding: 0 !important;
    background: #eef2f6 !important;
    backdrop-filter: none !important;
  }

  #video-viewer-overlay .activity-viewer-shell,
  #web-viewer-overlay .activity-viewer-shell {
    width: 100vw !important;
    height: 100dvh !important;
    max-height: 100dvh !important;
    border: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    background: #eef2f6 !important;
  }

  #video-viewer-overlay .activity-viewer-header,
  #web-viewer-overlay .activity-viewer-header {
    flex: 0 0 auto !important;
    min-height: 52px !important;
    padding: calc(0.5rem + env(safe-area-inset-top, 0px)) 0.75rem 0.5rem !important;
    border-bottom: 1px solid rgba(15, 23, 42, 0.08) !important;
    background: rgba(255, 255, 255, 0.98) !important;
  }

  #video-viewer-overlay .activity-viewer-title-block h3,
  #web-viewer-overlay .activity-viewer-title-block h3 {
    font-size: 1.02rem !important;
    line-height: 1.2 !important;
  }

  #video-viewer-overlay .activity-viewer-body,
  #web-viewer-overlay .activity-viewer-body {
    flex: 1 1 auto !important;
    min-height: 0 !important;
    overflow: hidden !important;
    padding: 0 !important;
    background: #eef2f6 !important;
  }

  #video-viewer-overlay .activity-viewer-body {
    display: flex !important;
    align-items: flex-start !important;
    justify-content: center !important;
    padding: 0.75rem !important;
  }

  #video-viewer-overlay .activity-viewer-frame {
    width: 100% !important;
    height: auto !important;
    min-height: 0 !important;
    aspect-ratio: 16 / 9 !important;
    border-radius: 14px !important;
    border: 1px solid rgba(15, 23, 42, 0.08) !important;
    background: #0f172a !important;
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.12) !important;
  }

  #web-viewer-overlay .activity-viewer-frame {
    display: flex !important;
    flex-direction: column !important;
    width: 100% !important;
    height: 100% !important;
    min-height: 0 !important;
    border: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    background: #fff !important;
  }

  #video-viewer-overlay .activity-viewer-embed,
  #web-viewer-overlay .activity-viewer-embed {
    display: block !important;
    width: 100% !important;
    height: 100% !important;
    border: 0 !important;
  }

  #web-viewer-overlay .activity-viewer-embed {
    flex: 1 1 auto !important;
    min-height: 0 !important;
    height: auto !important;
  }

  #web-viewer-overlay .activity-tracking-bar {
    min-height: 38px !important;
    padding: 0.45rem 0.72rem !important;
    border-radius: 0 !important;
    font-size: 0.78rem !important;
  }

  #video-viewer-overlay .activity-viewer-footer,
  #web-viewer-overlay .activity-viewer-footer {
    flex: 0 0 auto !important;
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) auto !important;
    align-items: center !important;
    gap: 0.6rem !important;
    padding: 0.62rem 0.75rem calc(0.62rem + env(safe-area-inset-bottom, 0px)) !important;
    background: rgba(255, 255, 255, 0.98) !important;
  }

  #video-viewer-overlay .activity-viewer-meta,
  #web-viewer-overlay .activity-viewer-meta {
    min-width: 0 !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
  }

  #video-viewer-overlay .activity-viewer-link,
  #web-viewer-overlay .activity-viewer-link {
    width: auto !important;
    min-height: 40px !important;
    padding: 0.55rem 0.8rem !important;
    border-radius: 999px !important;
    background: rgba(45, 43, 107, 0.1) !important;
    color: var(--olive-deep) !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    white-space: nowrap !important;
  }

  #interactive-video-viewer-overlay .interactive-video-layout {
    display: flex;
    flex-direction: column;
    gap: 0;
    height: auto;
    min-height: 100%;
    overflow: visible;
    padding-top: var(--iv-stage-offset, 0px);
  }

  #interactive-video-viewer-overlay .interactive-video-stage {
    position: fixed;
    top: var(--iv-overlay-top, 0px);
    left: 0;
    right: 0;
    z-index: 20;
    gap: 0.45rem;
    padding: 0.58rem 0.68rem 0.55rem;
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
    background: #ffffff;
    box-shadow: 0 4px 14px rgba(15, 23, 42, 0.12);
    overflow: visible;
  }

  /* Summary slot pinned to stage bottom on mobile */
  #interactive-video-viewer-overlay .interactive-video-stage > .interactive-video-summary-slot {
    margin-top: 0.45rem;
  }

  #interactive-video-viewer-overlay .interactive-video-player-shell {
    flex: 0 0 auto;
    aspect-ratio: 16 / 9;
    max-height: 42dvh;
    min-height: 0;
    border-radius: 14px;
    box-shadow: none;
  }

  #interactive-video-viewer-overlay .interactive-video-stage-controls {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 0.42rem;
    padding: 0.42rem;
    border-radius: 14px;
    box-shadow: none;
  }

  #interactive-video-viewer-overlay .interactive-video-stage-controls.is-status-only {
    display: flex;
    justify-content: flex-end;
    padding: 0.36rem 0.42rem;
  }

  #interactive-video-viewer-overlay .interactive-video-stage-controls.is-status-only .interactive-video-stage-meta {
    justify-content: flex-end;
    width: 100%;
  }

  #interactive-video-viewer-overlay .interactive-video-stage-toggle {
    min-width: 68px;
    min-height: 34px;
    padding: 0.42rem 0.64rem;
    border-radius: 999px;
    font-size: 0.78rem;
    text-align: center;
  }

  #interactive-video-viewer-overlay .interactive-video-stage-meta {
    min-width: 0;
    justify-content: flex-end;
    gap: 0.32rem;
    flex-wrap: nowrap;
  }

  #interactive-video-viewer-overlay .interactive-video-stage-mode,
  #interactive-video-viewer-overlay .interactive-video-stage-time {
    min-height: 30px;
    padding: 0.26rem 0.52rem;
    font-size: 0.68rem;
    white-space: nowrap;
  }

  #interactive-video-viewer-overlay .interactive-video-stage-mode {
    max-width: 46vw;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  #interactive-video-viewer-overlay .interactive-video-stage-hint {
    display: none;
  }

  #interactive-video-viewer-overlay .interactive-video-sidebar {
    flex: 1 1 auto;
    height: auto;
    min-height: 0;
    gap: 0.58rem;
    padding: 0.68rem;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    overflow: visible;
  }

  #interactive-video-viewer-overlay .interactive-video-sidebar-head,
  #interactive-video-viewer-overlay .interactive-video-sidebar-actions {
    display: none;
  }

  #interactive-video-viewer-overlay .interactive-video-summary-card {
    padding: 0.62rem;
    border-radius: 14px;
    box-shadow: none;
  }

  #interactive-video-viewer-overlay .interactive-video-summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.42rem;
  }

  #interactive-video-viewer-overlay .interactive-video-summary-item span {
    font-size: 0.64rem;
    letter-spacing: 0;
    text-transform: none;
    white-space: nowrap;
  }

  #interactive-video-viewer-overlay .interactive-video-summary-item strong {
    font-size: 0.88rem;
  }

  #interactive-video-viewer-overlay .interactive-video-summary-note {
    display: none;
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-status-slot {
    display: none;
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-status {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.42rem 0.58rem;
    align-items: center;
    padding: 0.62rem;
    border: 1px solid rgba(148, 163, 184, 0.18);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.96);
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-status-copy {
    min-width: 0;
    display: flex;
    align-items: baseline;
    gap: 0.45rem;
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-status-copy span {
    color: var(--gray-500);
    font-size: 0.72rem;
    font-weight: 800;
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-status-copy strong {
    color: var(--charcoal);
    font-size: 1rem;
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-status-chips {
    min-width: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.32rem;
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-status-chips span {
    min-height: 26px;
    display: inline-flex;
    align-items: center;
    padding: 0.18rem 0.48rem;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.06);
    color: var(--gray-600);
    font-size: 0.7rem;
    font-weight: 800;
    white-space: nowrap;
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-list-toggle {
    grid-column: 2;
    grid-row: 1 / span 2;
    min-height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 0.72rem;
    border: 0;
    border-radius: 999px;
    background: var(--navy);
    color: var(--white);
    font-size: 0.78rem;
    font-weight: 800;
    white-space: nowrap;
    touch-action: manipulation;
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-list-toggle:disabled {
    color: var(--gray-400);
    background: rgba(15, 23, 42, 0.08);
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-prompt-list {
    grid-column: 1 / -1;
    display: grid;
    gap: 0.45rem;
    margin-top: 0.12rem;
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-prompt-item {
    width: 100%;
    min-height: 54px;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.55rem;
    padding: 0.55rem 0.62rem;
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.98);
    color: var(--gray-900);
    text-align: left;
    box-shadow: 0 8px 18px rgba(15, 23, 42, 0.04);
    touch-action: manipulation;
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-prompt-item.is-unanswered {
    border-color: rgba(245, 158, 11, 0.24);
    background: rgba(255, 251, 235, 0.92);
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-prompt-item.is-incorrect {
    border-color: rgba(239, 68, 68, 0.24);
    background: rgba(254, 242, 242, 0.92);
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-prompt-time,
  #interactive-video-viewer-overlay .interactive-video-mobile-prompt-action {
    min-height: 26px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.12rem 0.46rem;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.06);
    color: var(--navy);
    font-size: 0.7rem;
    font-weight: 900;
    white-space: nowrap;
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-prompt-main {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.12rem;
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-prompt-main strong {
    min-width: 0;
    overflow: hidden;
    color: var(--charcoal);
    font-size: 0.82rem;
    font-weight: 900;
    line-height: 1.25;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  #interactive-video-viewer-overlay .interactive-video-mobile-prompt-main em {
    color: var(--gray-500);
    font-size: 0.68rem;
    font-style: normal;
    font-weight: 800;
  }

  #interactive-video-viewer-overlay .interactive-video-conversation {
    gap: 0.58rem;
    padding: 0;
    overflow: visible;
  }

  #interactive-video-viewer-overlay:not(.interactive-video-has-active-prompt) .interactive-video-prompt-slot {
    display: none;
  }

  #interactive-video-viewer-overlay .interactive-video-transcript {
    display: flex;
  }

  #interactive-video-viewer-overlay.interactive-video-has-active-prompt .interactive-video-prompt-slot {
    position: relative;
    display: block;
    margin-top: 0.85rem;
    padding: 0;
    overflow: visible;
    background: transparent;
    box-shadow: none;
  }

  #interactive-video-viewer-overlay.interactive-video-has-active-prompt .interactive-video-prompt-card {
    padding: 1rem 0.95rem 0.95rem;
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: 16px;
    background: #ffffff;
    box-shadow: 0 12px 32px rgba(15, 23, 42, 0.14);
  }

  #interactive-video-viewer-overlay .interactive-video-sheet-handle {
    display: block;
    width: 42px;
    height: 4px;
    margin: 0 auto 0.6rem;
    border-radius: 999px;
    background: rgba(100, 116, 139, 0.28);
  }

  #interactive-video-viewer-overlay .interactive-video-prompt-head {
    gap: 0.55rem;
    margin-bottom: 0.55rem;
  }

  #interactive-video-viewer-overlay .interactive-video-prompt-label,
  #interactive-video-viewer-overlay .interactive-video-prompt-time,
  #interactive-video-viewer-overlay .interactive-video-bubble-kicker {
    font-size: 0.66rem;
  }

  #interactive-video-viewer-overlay .interactive-video-prompt-question {
    font-size: 0.98rem;
    font-weight: 800;
    line-height: 1.5;
  }

  #interactive-video-viewer-overlay .interactive-video-prompt-required {
    margin-top: 0.42rem;
    font-size: 0.76rem;
    line-height: 1.45;
  }

  #interactive-video-viewer-overlay .interactive-video-options,
  #interactive-video-viewer-overlay .interactive-video-text-answer {
    gap: 0.48rem;
    margin-top: 0.65rem;
  }

  #interactive-video-viewer-overlay .interactive-video-option,
  #interactive-video-viewer-overlay .interactive-video-submit,
  #interactive-video-viewer-overlay .interactive-video-defer-btn,
  #interactive-video-viewer-overlay .interactive-video-reply-btn {
    min-height: 44px;
    padding: 0.66rem 0.72rem;
    border-radius: 12px;
    box-shadow: none !important;
    transform: none !important;
  }

  #interactive-video-viewer-overlay .interactive-video-defer-btn {
    margin-top: 0.5rem;
  }

  #interactive-video-viewer-overlay .interactive-video-text-answer textarea {
    min-height: 86px;
    max-height: 22dvh;
  }

  #interactive-video-viewer-overlay .interactive-video-transcript {
    gap: 0.55rem;
    padding-bottom: 0.5rem;
  }

  #interactive-video-viewer-overlay .interactive-video-prompt-thread {
    gap: 0.45rem;
  }

  #interactive-video-viewer-overlay .interactive-video-inline-prompt-shell {
    margin-left: 0;
    max-width: 100%;
  }

  #interactive-video-viewer-overlay.interactive-video-has-active-prompt .interactive-video-prompt-card.is-inline {
    padding: 0.76rem;
    border-radius: 15px;
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.1);
  }

  #interactive-video-viewer-overlay .interactive-video-prompt-card.is-inline .interactive-video-prompt-head {
    margin-bottom: 0.48rem;
  }

  #interactive-video-viewer-overlay .interactive-video-bubble-row {
    gap: 0.45rem;
    align-items: flex-start;
  }

  #interactive-video-viewer-overlay .interactive-video-avatar {
    width: 28px;
    height: 28px;
    font-size: 0.72rem;
  }

  #interactive-video-viewer-overlay .interactive-video-bubble {
    max-width: calc(100% - 34px);
    padding: 0.62rem 0.68rem;
    border-radius: 14px;
  }

  #interactive-video-viewer-overlay .interactive-video-bubble-text {
    font-size: 0.86rem;
    line-height: 1.48;
  }

  #interactive-video-viewer-overlay .interactive-video-inline-answer,
  #interactive-video-viewer-overlay .interactive-video-inline-feedback {
    margin-top: 0.48rem;
    padding: 0.52rem 0.6rem;
    border-radius: 12px;
  }

  #interactive-video-viewer-overlay .interactive-video-inline-answer-label {
    gap: 0.3rem;
    font-size: 0.62rem;
    letter-spacing: 0;
  }

  #interactive-video-viewer-overlay .interactive-video-inline-answer-label span {
    min-height: 18px;
    padding: 0.08rem 0.34rem;
    font-size: 0.6rem;
  }

  #interactive-video-viewer-overlay .interactive-video-inline-answer-value {
    font-size: 0.84rem;
    line-height: 1.4;
  }

  #interactive-video-viewer-overlay .interactive-video-inline-feedback-text {
    font-size: 0.78rem;
    line-height: 1.45;
  }

  #interactive-video-viewer-overlay .interactive-video-prompt-state {
    min-height: 24px;
    padding: 0.2rem 0.48rem;
    font-size: 0.68rem;
  }

  #interactive-video-viewer-overlay .interactive-video-reply-btn {
    width: 100%;
    min-height: 36px;
    margin-top: 0.45rem;
    text-align: center;
  }
}

/* Mobile UX audit compact pass */
@media (max-width: 768px) {
  .course-header,
  .assignment-hero,
  .quiz-report-hero,
  .learning-progress-hero,
  .learning-progress-detail-hero,
  .management-hero,
  .notification-shell-hero,
  .course-roster-hero,
  .forum-thread-panel.is-hero {
    padding: 0.72rem !important;
    border-radius: 15px !important;
    margin-bottom: 0.62rem !important;
  }

  .course-hero,
  .assignment-info,
  .quiz-report-hero,
  .management-hero,
  .course-roster-hero {
    gap: 0.42rem !important;
  }

  .course-header .back-btn,
  .quiz-info-back-btn,
  .forum-back-btn,
  .video-player-back-btn,
  .assignment-back-btn,
  .management-back-link {
    width: 38px !important;
    min-width: 38px !important;
    height: 38px !important;
    min-height: 38px !important;
    padding: 0 !important;
    border-radius: 999px !important;
    font-size: 0 !important;
    gap: 0 !important;
    flex: 0 0 38px !important;
    justify-content: center !important;
  }

  .course-header .back-btn svg,
  .quiz-info-back-btn svg,
  .forum-back-btn svg,
  .video-player-back-btn svg,
  .assignment-back-btn svg,
  .management-back-link svg {
    width: 18px !important;
    height: 18px !important;
    margin: 0 !important;
  }

  .quiz-info-back-btn span:not(.quiz-info-back-icon),
  .forum-back-btn span,
  .video-player-back-btn span,
  .assignment-back-btn span,
  .management-back-link span {
    display: none !important;
  }

  .course-header-info h1,
  .assignment-info h1,
  .quiz-report-title,
  .quiz-info-header h1,
  .management-title,
  .course-roster-title,
  .forum-thread-title,
  .learning-progress-hero-copy h2,
  .learning-progress-detail-copy h2 {
    margin: 0 !important;
    font-size: 1.08rem !important;
    line-height: 1.22 !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 2 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
  }

  .course-header-info > p:not(.course-header-kicker),
  .assignment-subtitle,
  .quiz-report-desc,
  .quiz-description,
  .forum-thread-subtitle,
  .learning-progress-hero-copy p,
  .learning-progress-detail-copy p {
    margin: 0.24rem 0 0 !important;
    font-size: 0.78rem !important;
    line-height: 1.35 !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 1 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
  }

  .course-mobile-more {
    margin-top: 0.34rem !important;
  }

  .course-mobile-more summary {
    min-height: 29px !important;
    padding: 0.28rem 0.5rem !important;
    font-size: 0.7rem !important;
  }

  .course-mobile-more-body {
    gap: 0.42rem !important;
    margin-top: 0.38rem !important;
    padding: 0.5rem !important;
    border-radius: 12px !important;
  }

  .course-mobile-more-summary {
    margin: 0;
    color: rgba(255, 251, 245, 0.82);
    font-size: 0.76rem;
    line-height: 1.42;
  }

  .course-mobile-more-meta span,
  .course-mobile-stat span {
    font-size: 0.64rem !important;
  }

  .course-mobile-stat {
    padding: 0.38rem !important;
    border-radius: 10px !important;
  }

  .course-mobile-stat strong {
    font-size: 0.92rem !important;
  }

  .course-header-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.38rem !important;
    margin-top: 0.45rem !important;
  }

  .course-header-actions .btn-primary,
  .course-header-actions .btn-secondary,
  .quiz-report-hero-actions .btn-primary,
  .quiz-report-hero-actions .btn-secondary,
  .quiz-report-hero-actions .btn-danger {
    min-height: 36px !important;
    padding: 0.42rem 0.52rem !important;
    border-radius: 11px !important;
    font-size: 0.74rem !important;
  }

  .course-nav-tabs {
    margin-bottom: 0.62rem !important;
    padding: 0.28rem !important;
    gap: 0.22rem !important;
    border-radius: 13px !important;
  }

  .course-nav-tabs .nav-tab {
    min-height: 34px !important;
    padding: 0.42rem 0.58rem !important;
    border-radius: 10px !important;
    font-size: 0.74rem !important;
  }

  .moodle-course-card .course-cover,
  .bridge-class-card .bridge-class-card-hero,
  .activity-picker-card-hero {
    min-height: 92px !important;
    padding: 0.68rem !important;
  }

  .moodle-course-card .course-body,
  .bridge-class-card-body,
  .assignment-card,
  .quiz-card,
  .forum-item,
  .resource-card {
    padding: 0.68rem !important;
  }

  .moodle-course-card .course-cover-copy h3,
  .moodle-course-card .course-name,
  .assignment-info h3,
  .quiz-info h3,
  .forum-info h3,
  .activity-card-title {
    font-size: 0.92rem !important;
    line-height: 1.22 !important;
    -webkit-line-clamp: 1 !important;
  }

  .moodle-course-card .course-summary,
  .activity-card-description,
  .forum-desc,
  .assignment-course,
  .quiz-course,
  .resource-card-desc {
    margin-top: 0.22rem !important;
    font-size: 0.76rem !important;
    line-height: 1.36 !important;
    -webkit-line-clamp: 2 !important;
  }

  .activity-card-meta,
  .moodle-course-card .course-meta,
  .forum-stats,
  .quiz-meta {
    gap: 0.3rem !important;
  }

  .activity-card-meta span,
  .moodle-course-card .course-meta span,
  .forum-stats span,
  .quiz-meta span,
  .quiz-report-tag,
  .activity-chip {
    min-height: 26px !important;
    padding: 0.25rem 0.48rem !important;
    font-size: 0.68rem !important;
    line-height: 1.1 !important;
  }

  .course-section,
  .assignment-panel,
  .quiz-report-panel,
  .management-card,
  .management-table-shell,
  .gradebook-shell,
  .notification-center,
  .learning-progress-section,
  .forum-container,
  .forum-topic-card,
  .forum-thread-post,
  .course-roster-main-card,
  .course-roster-side-card {
    border-radius: 15px !important;
    box-shadow: none !important;
  }

  .section-header,
  .assignment-panel-head,
  .quiz-report-panel-head,
  .management-header,
  .management-table-heading,
  .course-roster-card-head,
  .forum-header,
  .forum-thread-replies-head {
    min-height: 0 !important;
    padding: 0.62rem 0.68rem !important;
    gap: 0.42rem !important;
  }

  .section-header h3,
  .assignment-panel-title,
  .quiz-report-panel-head h3,
  .management-title,
  .management-table-heading h3,
  .forum-header h2,
  .forum-thread-replies-title {
    font-size: 0.96rem !important;
    line-height: 1.22 !important;
  }

  .section-content,
  .assignment-body,
  .assignment-content,
  .quiz-report-panel,
  .management-card-body,
  .course-roster-card-body,
  .forum-card-body,
  .forum-topic-body,
  .forum-thread-post-body {
    padding: 0.68rem !important;
  }

  .empty-sections,
  .empty-list,
  .activity-empty-state,
  .assignment-empty-state,
  .builder-question-empty,
  .management-empty-preview,
  .certificate-rule-empty,
  .empty-state-small,
  .interactive-video-empty {
    min-height: 0 !important;
    padding: 1rem 0.72rem !important;
    border-radius: 14px !important;
  }

  .empty-sections svg,
  .activity-empty-state svg,
  .assignment-empty-state svg,
  .empty-list-icon,
  .management-empty-preview svg {
    width: 34px !important;
    height: 34px !important;
    margin-bottom: 0.35rem !important;
  }

  .empty-sections p,
  .activity-empty-state h3,
  .assignment-empty-state-title,
  .management-empty-preview,
  .empty-list {
    font-size: 0.88rem !important;
    line-height: 1.35 !important;
  }

  .quiz-info-page {
    gap: 0.7rem !important;
    padding: 0 !important;
  }

  .quiz-info-header,
  .quiz-info-details,
  .quiz-attempts-history,
  .quiz-resume-note,
  .quiz-action {
    padding: 0.72rem !important;
    border-radius: 15px !important;
  }

  .quiz-info-details {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.5rem !important;
  }

  .quiz-info-details .info-item {
    min-height: 0 !important;
    padding: 0.55rem !important;
    border-radius: 12px !important;
  }

  .quiz-info-details .label {
    font-size: 0.66rem !important;
  }

  .quiz-info-details .value {
    margin-top: 0.14rem !important;
    font-size: 0.84rem !important;
  }

  .quiz-attempts-history .data-table,
  .management-table {
    display: block !important;
    width: 100% !important;
    min-width: 0 !important;
    border-collapse: separate !important;
  }

  .quiz-attempts-history .data-table thead,
  .management-table thead {
    display: none !important;
  }

  .quiz-attempts-history .data-table tbody,
  .management-table tbody {
    display: grid !important;
    gap: 0.52rem !important;
  }

  .quiz-attempts-history .data-table tr,
  .management-table tr {
    display: grid !important;
    gap: 0.14rem !important;
    padding: 0.68rem !important;
    border: 1px solid rgba(26, 58, 92, 0.1) !important;
    border-radius: 14px !important;
    background: rgba(255, 255, 255, 0.96) !important;
    box-shadow: none !important;
  }

  .quiz-attempts-history .data-table td,
  .management-table td {
    display: grid !important;
    grid-template-columns: minmax(5.8rem, 38%) minmax(0, 1fr) !important;
    gap: 0.55rem !important;
    align-items: center !important;
    padding: 0.34rem 0 !important;
    border: 0 !important;
    background: transparent !important;
    text-align: right !important;
    white-space: normal !important;
    min-width: 0 !important;
  }

  .quiz-attempts-history .data-table td::before,
  .management-table td::before {
    content: attr(data-label);
    min-width: 0;
    color: var(--gray-500);
    font-size: 0.68rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: 0.03em;
    text-align: left;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .quiz-attempts-history .data-table td:first-child,
  .management-table td:first-child {
    padding-bottom: 0.5rem !important;
    border-bottom: 1px solid rgba(26, 58, 92, 0.08) !important;
    text-align: left !important;
  }

  .quiz-attempts-history .data-table td:first-child::before,
  .management-table td:first-child::before {
    display: none !important;
  }

  .quiz-report-scoreboard,
  .course-roster-metrics,
  .management-metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.48rem !important;
  }

  .quiz-report-scorecard,
  .management-metric-card {
    min-height: 0 !important;
    padding: 0.62rem !important;
    border-radius: 13px !important;
  }

  .quiz-report-scorecard-value,
  .management-metric-value {
    font-size: 1.2rem !important;
    line-height: 1.05 !important;
  }

  .quiz-report-scorecard-note,
  .management-metric-helper {
    display: none !important;
  }

  .forum-thread-stats,
  .forum-thread-meta,
  .forum-thread-subtitle,
  .forum-thread-post-rail {
    display: none !important;
  }

  .forum-thread-post {
    display: grid !important;
    grid-template-columns: 34px minmax(0, 1fr) !important;
    gap: 0.58rem !important;
    padding: 0.72rem !important;
  }

  .forum-thread-avatar {
    width: 34px !important;
    height: 34px !important;
    border-radius: 11px !important;
    font-size: 0.82rem !important;
  }

  .forum-thread-post-title,
  .forum-thread-post-author {
    font-size: 0.94rem !important;
    line-height: 1.25 !important;
  }

  .forum-thread-post-content {
    font-size: 0.84rem !important;
    line-height: 1.48 !important;
  }

  .forum-social-actions,
  .forum-thread-post-actions,
  .category-actions {
    gap: 0.38rem !important;
  }

  .forum-reaction-btn,
  .forum-topic-cta {
    min-height: 34px !important;
    padding: 0.34rem 0.58rem !important;
    border-radius: 999px !important;
    font-size: 0.76rem !important;
  }

  .course-message-thread-head,
  .notification-detail-hero {
    grid-template-columns: 42px minmax(0, 1fr) !important;
  }

  .course-message-thread-messages {
    min-height: 136px !important;
    max-height: 48dvh !important;
  }

  .course-message-reply-form {
    position: sticky;
    bottom: 0;
    z-index: 3;
  }
}

@media (max-width: 420px) {
  .course-header,
  .assignment-hero,
  .quiz-report-hero,
  .learning-progress-hero,
  .learning-progress-detail-hero,
  .management-hero,
  .notification-shell-hero,
  .course-roster-hero,
  .forum-thread-panel.is-hero {
    padding: 0.64rem !important;
  }

  .course-header-info h1,
  .assignment-info h1,
  .quiz-report-title,
  .quiz-info-header h1,
  .management-title,
  .course-roster-title,
  .forum-thread-title {
    font-size: 1rem !important;
  }

  .quiz-info-details,
  .quiz-report-scoreboard,
  .course-roster-metrics,
  .management-metric-grid {
    grid-template-columns: 1fr 1fr !important;
  }
}

/* Mobile calendar density pass */
#moodleCalendarView .calendar-day.today {
  background: rgba(87, 109, 72, 0.1);
}

#moodleCalendarView .calendar-event.assignment {
  background: rgba(193, 122, 94, 0.16);
  color: var(--terracotta-dark);
}

#moodleCalendarView .calendar-event.quiz {
  background: rgba(91, 107, 214, 0.16);
  color: #3f51b5;
}

#moodleCalendarView .calendar-event.course {
  background: rgba(87, 109, 72, 0.16);
  color: var(--olive-deep);
}

#moodleCalendarView .calendar-event.forum {
  background: rgba(26, 58, 92, 0.12);
  color: var(--olive-deep);
}

#moodleCalendarView .calendar-event.personal {
  background: rgba(14, 165, 233, 0.14);
  color: #0f6f91;
}

#moodleCalendarView .calendar-day-event-count {
  display: none;
}

#moodleCalendarView .calendar-day-events {
  display: flex;
  flex-direction: column;
  gap: 0.18rem;
  min-width: 0;
}

#moodleCalendarView .calendar-upcoming-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.7rem;
}

#moodleCalendarView .calendar-upcoming-item {
  width: 100%;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  align-items: center;
  gap: 0.85rem;
  padding: 0.78rem 0.85rem;
  border: 1px solid rgba(26, 58, 92, 0.08);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.92));
  color: inherit;
  text-align: left;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.65);
}

#moodleCalendarView .calendar-upcoming-item:focus-visible {
  outline: 2px solid rgba(74, 93, 35, 0.26);
  outline-offset: 2px;
}

#moodleCalendarView .calendar-upcoming-date {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(26, 58, 92, 0.06);
  color: var(--olive-deep);
  line-height: 1;
}

#moodleCalendarView .calendar-upcoming-date .day {
  font-size: 1.08rem;
  font-weight: 800;
}

#moodleCalendarView .calendar-upcoming-date .month {
  margin-top: 0.18rem;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--gray-500);
}

#moodleCalendarView .calendar-upcoming-info {
  min-width: 0;
}

#moodleCalendarView .calendar-upcoming-meta {
  display: flex;
  align-items: center;
  gap: 0.38rem;
  flex-wrap: wrap;
  margin-bottom: 0.18rem;
}

#moodleCalendarView .calendar-upcoming-type,
#moodleCalendarView .calendar-upcoming-time {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0.16rem 0.48rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  white-space: nowrap;
}

#moodleCalendarView .calendar-upcoming-type {
  background: rgba(87, 109, 72, 0.12);
  color: var(--olive-deep);
}

#moodleCalendarView .calendar-upcoming-time {
  background: rgba(26, 58, 92, 0.06);
  color: var(--gray-500);
}

#moodleCalendarView .calendar-upcoming-item.tone-assignment .calendar-upcoming-type {
  background: rgba(193, 122, 94, 0.14);
  color: var(--terracotta-dark);
}

#moodleCalendarView .calendar-upcoming-item.tone-quiz .calendar-upcoming-type {
  background: rgba(91, 107, 214, 0.14);
  color: #3f51b5;
}

#moodleCalendarView .calendar-upcoming-item.tone-forum .calendar-upcoming-type {
  background: rgba(26, 58, 92, 0.08);
  color: var(--olive-deep);
}

#moodleCalendarView .calendar-upcoming-item.tone-personal .calendar-upcoming-type {
  background: rgba(14, 165, 233, 0.12);
  color: #0f6f91;
}

#moodleCalendarView .calendar-upcoming-title {
  font-size: 0.94rem;
  font-weight: 800;
  color: var(--charcoal);
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#moodleCalendarView .calendar-upcoming-course {
  margin-top: 0.18rem;
  font-size: 0.78rem;
  color: var(--gray-500);
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (max-width: 640px) {
  #moodleCalendarView.dashboard {
    padding: 0.62rem !important;
  }

  #moodleCalendarView .calendar-shell,
  #moodleCalendarView .calendar-container {
    gap: 0.72rem !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
    overflow: visible !important;
  }

  #moodleCalendarView .calendar-toolbar-shell {
    padding: 0.66rem 0.72rem !important;
    border: 1px solid rgba(26, 58, 92, 0.08) !important;
    border-radius: 16px !important;
    background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,245,239,0.9)) !important;
    box-shadow: none !important;
    flex-wrap: nowrap !important;
  }

  #moodleCalendarView .calendar-title {
    font-size: 1rem !important;
    line-height: 1.2 !important;
    white-space: nowrap !important;
  }

  #moodleCalendarView .calendar-nav-shell {
    gap: 0.34rem !important;
    flex: 0 0 auto;
  }

  #moodleCalendarView .calendar-nav-shell .bridge-secondary-btn {
    width: 36px !important;
    height: 36px !important;
    min-width: 36px !important;
    min-height: 36px !important;
    padding: 0 !important;
    border-radius: 12px !important;
  }

  #moodleCalendarView .calendar-nav-shell .calendar-today-btn {
    width: auto !important;
    min-width: 48px !important;
    padding: 0 0.58rem !important;
    font-size: 0.76rem !important;
    font-weight: 800 !important;
  }

  #moodleCalendarView .calendar-grid {
    grid-template-columns: repeat(7, minmax(0, 1fr)) !important;
    grid-auto-rows: minmax(42px, auto) !important;
    border: 1px solid rgba(26, 58, 92, 0.08);
    border-radius: 16px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.96);
  }

  #moodleCalendarView .calendar-weekday {
    padding: 0.42rem 0.1rem !important;
    font-size: 0.66rem !important;
    font-weight: 800 !important;
    letter-spacing: 0 !important;
  }

  #moodleCalendarView .calendar-day {
    min-height: 42px !important;
    padding: 0.25rem !important;
    border-color: rgba(26, 58, 92, 0.06) !important;
    display: flex !important;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.12rem;
    background: rgba(255, 255, 255, 0.86);
  }

  #moodleCalendarView .calendar-day.other-month {
    opacity: 0.45;
  }

  #moodleCalendarView .calendar-day.has-events {
    background: rgba(246, 248, 244, 0.96);
  }

  #moodleCalendarView .calendar-day .day-number {
    margin: 0 !important;
    font-size: 0.76rem !important;
    line-height: 1 !important;
  }

  #moodleCalendarView .calendar-day.today .day-number {
    width: 23px !important;
    height: 23px !important;
    font-size: 0.72rem !important;
  }

  #moodleCalendarView .calendar-day-event-count {
    position: absolute;
    top: 3px;
    right: 3px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 15px;
    height: 15px;
    padding: 0 0.18rem;
    border-radius: 999px;
    background: rgba(26, 58, 92, 0.1);
    color: var(--olive-deep);
    font-size: 0.58rem;
    font-weight: 800;
    line-height: 1;
  }

  #moodleCalendarView .calendar-day-events {
    margin-top: auto;
    display: flex !important;
    flex-direction: row;
    align-items: center;
    gap: 2px;
    max-width: 100%;
  }

  #moodleCalendarView .calendar-event {
    width: 6px !important;
    height: 6px !important;
    min-width: 6px !important;
    padding: 0 !important;
    margin: 0 !important;
    border-radius: 999px !important;
    display: inline-flex !important;
    overflow: hidden !important;
    color: transparent !important;
    font-size: 0 !important;
    line-height: 0 !important;
  }

  #moodleCalendarView .calendar-more {
    display: inline-flex !important;
    align-items: center;
    padding: 0 !important;
    font-size: 0.58rem !important;
    line-height: 1 !important;
    color: var(--gray-500);
  }

  #moodleCalendarView .calendar-upcoming-section {
    gap: 0.52rem !important;
    padding: 0.72rem !important;
    border: 1px solid rgba(26, 58, 92, 0.08);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.96);
  }

  #moodleCalendarView .calendar-section-title {
    font-size: 0.95rem !important;
    line-height: 1.2 !important;
  }

  #moodleCalendarView #upcomingEventsList {
    gap: 0.52rem !important;
  }

  #moodleCalendarView .calendar-upcoming-list {
    gap: 0.52rem !important;
  }

  #moodleCalendarView .calendar-upcoming-item {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 0.58rem;
    padding: 0.62rem 0.65rem;
    border-radius: 14px;
  }

  #moodleCalendarView .calendar-upcoming-date {
    width: 40px;
    height: 40px;
    border-radius: 12px;
  }

  #moodleCalendarView .calendar-upcoming-date .day {
    font-size: 0.98rem;
  }

  #moodleCalendarView .calendar-upcoming-date .month {
    font-size: 0.62rem;
  }

  #moodleCalendarView .calendar-upcoming-meta {
    gap: 0.28rem;
    margin-bottom: 0.12rem;
  }

  #moodleCalendarView .calendar-upcoming-type,
  #moodleCalendarView .calendar-upcoming-time {
    min-height: 21px;
    padding: 0.12rem 0.4rem;
    font-size: 0.64rem;
  }

  #moodleCalendarView .calendar-upcoming-title {
    font-size: 0.86rem;
  }

  #moodleCalendarView .calendar-upcoming-course {
    font-size: 0.72rem;
  }

  #calendarDayEventsModal .modal-content {
    --modal-max-width: calc(100vw - 1rem) !important;
    max-height: calc(100dvh - env(safe-area-inset-top, 0px) - 1rem) !important;
    border-radius: 18px !important;
  }

  #calendarDayEventsModal .modal-header {
    padding: 0.82rem 0.9rem !important;
  }

  #calendarDayEventsModal .modal-title {
    font-size: 1rem !important;
    line-height: 1.25 !important;
  }

  #calendarDayEventsModal .modal-description {
    display: none !important;
  }

  #calendarDayEventsModal .modal-scroll-body {
    padding: 0.7rem !important;
  }

  #calendarDayEventsModal .calendar-day-modal-shell {
    gap: 0.62rem !important;
  }

  #calendarDayEventsModal .calendar-day-modal-hero {
    display: flex !important;
    align-items: center !important;
    gap: 0.58rem !important;
    padding: 0.62rem !important;
    border-radius: 14px !important;
  }

  #calendarDayEventsModal .calendar-day-modal-date-card {
    min-width: 54px !important;
    width: 54px !important;
    padding: 0.44rem 0.34rem !important;
    border-radius: 12px !important;
    box-shadow: none !important;
    text-align: center;
  }

  #calendarDayEventsModal .calendar-day-modal-date-top {
    font-size: 0.58rem !important;
  }

  #calendarDayEventsModal .calendar-day-modal-date-value {
    font-size: 0.92rem !important;
  }

  #calendarDayEventsModal .calendar-day-modal-kicker {
    display: none !important;
  }

  #calendarDayEventsModal .calendar-day-modal-title {
    font-size: 0.95rem !important;
  }

  #calendarDayEventsModal .calendar-day-modal-desc {
    margin-top: 0.16rem !important;
    font-size: 0.76rem !important;
    line-height: 1.35 !important;
  }

  #calendarDayEventsModal .calendar-day-event-list {
    grid-template-columns: 1fr !important;
    gap: 0.5rem !important;
  }

  #calendarDayEventsModal .calendar-day-event-item {
    padding: 0.62rem !important;
    border-radius: 14px !important;
  }

  #calendarDayEventsModal .calendar-day-event-item:hover {
    transform: none !important;
  }

  #calendarDayEventsModal .calendar-day-event-badge-row {
    margin-bottom: 0.38rem !important;
  }

  #calendarDayEventsModal .calendar-day-event-badge {
    min-height: 22px !important;
    padding: 0.14rem 0.46rem !important;
    font-size: 0.66rem !important;
  }

  #calendarDayEventsModal .calendar-day-event-open {
    font-size: 0.68rem !important;
  }

  #calendarDayEventsModal .calendar-day-event-main {
    flex-direction: row !important;
    align-items: center !important;
    gap: 0.52rem !important;
  }

  #calendarDayEventsModal .calendar-day-event-title {
    font-size: 0.86rem !important;
    line-height: 1.34 !important;
  }

  #calendarDayEventsModal .calendar-day-event-course {
    margin-top: 0.14rem !important;
    font-size: 0.72rem !important;
    line-height: 1.3 !important;
  }

  #calendarDayEventsModal .calendar-day-event-time {
    min-width: 54px !important;
    width: auto !important;
    padding: 0.24rem 0.48rem !important;
    font-size: 0.68rem !important;
  }
}

@media (max-width: 420px) {
  #moodleCalendarView .calendar-toolbar-shell {
    padding: 0.58rem !important;
  }

  #moodleCalendarView .calendar-title {
    font-size: 0.94rem !important;
  }

  #moodleCalendarView .calendar-nav-shell .bridge-secondary-btn {
    width: 34px !important;
    height: 34px !important;
    min-width: 34px !important;
    min-height: 34px !important;
  }

  #moodleCalendarView .calendar-nav-shell .calendar-today-btn {
    min-width: 44px !important;
    padding: 0 0.48rem !important;
  }

  #moodleCalendarView .calendar-grid {
    grid-auto-rows: minmax(39px, auto) !important;
  }

  #moodleCalendarView .calendar-day {
    min-height: 39px !important;
  }
}

/* Mobile deep UX audit density pass */
@media (max-width: 768px) {
  .dashboard,
  .learning-progress-shell,
  .learning-progress-detail,
  .management-detail-page,
  .assignment-detail,
  .quiz-info-page,
  .teacher-gradebook,
  .completion-settings-page,
  .license-dashboard {
    padding: 0.72rem !important;
  }

  .content-grid,
  .dashboard-grid,
  .dashboard-stack,
  .course-list,
  .activity-list,
  .assignment-list,
  .quiz-list,
  .forum-list,
  .recent-activity-list,
  .recent-submissions-list {
    gap: 0.55rem !important;
  }

  .dashboard-greeting {
    margin-bottom: 0.72rem !important;
    padding: 0.82rem !important;
    border-radius: 16px !important;
    box-shadow: none !important;
  }

  .dashboard-greeting::before,
  .dashboard-greeting::after {
    display: none !important;
  }

  .dashboard-greeting .greeting-content {
    align-items: stretch !important;
    gap: 0.65rem !important;
    text-align: left !important;
  }

  .dashboard-greeting .greeting-text h1 {
    margin: 0 0 0.12rem !important;
    font-size: 1.12rem !important;
    line-height: 1.18 !important;
  }

  .dashboard-greeting .greeting-text p {
    margin: 0 !important;
    font-size: 0.78rem !important;
    line-height: 1.28 !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 1 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
  }

  .dashboard-greeting .progress-ring-container {
    display: none !important;
  }

  .dashboard-greeting .greeting-stats {
    width: 100% !important;
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.42rem !important;
  }

  .dashboard-greeting .greeting-stat-item {
    min-width: 0 !important;
    padding: 0.45rem 0.5rem !important;
    border-radius: 12px !important;
    background: rgba(255, 255, 255, 0.12) !important;
    text-align: center !important;
  }

  .dashboard-greeting .greeting-stat-value {
    margin: 0 !important;
    font-size: 1.02rem !important;
    line-height: 1.05 !important;
  }

  .dashboard-greeting .greeting-stat-label {
    margin-top: 0.12rem !important;
    font-size: 0.68rem !important;
    line-height: 1.15 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .stats-grid,
  .pending-tasks-grid,
  .dashboard-badge-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.55rem !important;
    margin-bottom: 0.72rem !important;
  }

  .stat-card,
  .path-summary-card,
  .badge-stat-card,
  .dashboard-badge-card {
    min-height: 0 !important;
    padding: 0.68rem !important;
    border-radius: 14px !important;
    box-shadow: none !important;
  }

  .stat-header {
    margin-bottom: 0.38rem !important;
  }

  .stat-icon,
  .dashboard-badge-icon,
  .grade-icon,
  .recent-activity-icon {
    width: 34px !important;
    height: 34px !important;
    border-radius: 11px !important;
  }

  .stat-icon svg,
  .dashboard-badge-icon svg,
  .grade-icon svg,
  .recent-activity-icon svg {
    width: 16px !important;
    height: 16px !important;
  }

  .stat-value,
  .path-summary-card strong,
  .badge-stat-card .value {
    margin-bottom: 0.12rem !important;
    font-size: 1.36rem !important;
    line-height: 1.05 !important;
  }

  .stat-label,
  .dashboard-badge-name,
  .dashboard-badge-caption,
  .dashboard-badge-meta {
    font-size: 0.74rem !important;
    line-height: 1.24 !important;
  }

  .card,
  .settings-panel,
  .learning-progress-course-card,
  .course-roster-main-card,
  .course-roster-side-card,
  .notification-message-inbox,
  .notification-center,
  .moodle-course-card,
  .class-card,
  .bridge-class-card {
    border-radius: 15px !important;
    box-shadow: none !important;
  }

  .card-header,
  .settings-panel-head,
  .course-roster-card-head,
  .participants-directory-header {
    min-height: 0 !important;
    padding: 0.62rem 0.68rem !important;
    gap: 0.45rem !important;
  }

  .card-body,
  .settings-panel-body,
  .settings-panel .card-body,
  .course-roster-card-body,
  .participants-directory-shell {
    padding: 0.68rem !important;
  }

  .settings-hero {
    border-radius: 16px !important;
    margin-bottom: 0.72rem !important;
    box-shadow: none !important;
  }

  .settings-hero-body {
    display: grid !important;
    grid-template-columns: 44px minmax(0, 1fr) !important;
    align-items: center !important;
    gap: 0.58rem !important;
    padding: 0.72rem !important;
  }

  .settings-hero-avatar {
    width: 44px !important;
    height: 44px !important;
    border-radius: 13px !important;
    font-size: 0.95rem !important;
  }

  .settings-hero-name {
    margin: 0 !important;
    font-size: 1.04rem !important;
    line-height: 1.18 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .settings-hero-email {
    margin-top: 0.14rem !important;
    font-size: 0.78rem !important;
    line-height: 1.2 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .settings-hero-meta {
    grid-column: 1 / -1 !important;
    display: grid !important;
    grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
    gap: 0.42rem !important;
    margin-top: 0.1rem !important;
  }

  .settings-hero-meta-card {
    min-width: 0 !important;
    padding: 0.45rem 0.48rem !important;
    border-radius: 12px !important;
  }

  .settings-hero-meta-label,
  .settings-hero-meta-value {
    display: block !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .settings-hero-meta-label {
    font-size: 0.62rem !important;
    line-height: 1.1 !important;
  }

  .settings-hero-meta-value {
    margin-top: 0.12rem !important;
    font-size: 0.78rem !important;
    line-height: 1.15 !important;
  }

  .settings-panel-desc,
  .settings-panel-kicker {
    display: none !important;
  }

  .settings-card-action {
    width: auto !important;
    min-width: 0 !important;
  }

  .learning-progress-hero,
  .learning-progress-detail-hero {
    padding: 0.68rem !important;
    border-radius: 15px !important;
  }

  .learning-progress-kicker,
  .learning-progress-note,
  .learning-progress-course-desc {
    display: none !important;
  }

  .learning-progress-summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.42rem !important;
    margin-top: 0.55rem !important;
  }

  .learning-progress-summary-card,
  .learning-progress-metric,
  .learning-progress-activity-stat {
    min-height: 0 !important;
    padding: 0.5rem !important;
    border-radius: 12px !important;
  }

  .learning-progress-summary-card label,
  .learning-progress-metric label,
  .learning-progress-activity-stat label {
    margin-bottom: 0.14rem !important;
    font-size: 0.62rem !important;
    line-height: 1.12 !important;
    letter-spacing: 0.02em !important;
  }

  .learning-progress-summary-card strong,
  .learning-progress-metric strong,
  .learning-progress-activity-stat strong {
    font-size: 0.92rem !important;
    line-height: 1.12 !important;
  }

  .learning-progress-course-card {
    padding: 0.68rem !important;
  }

  .learning-progress-course-head {
    flex-direction: row !important;
    align-items: center !important;
    margin-bottom: 0.55rem !important;
    gap: 0.5rem !important;
  }

  .learning-progress-course-title {
    font-size: 0.96rem !important;
    line-height: 1.22 !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 1 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
  }

  .learning-progress-status-chip {
    padding: 0.26rem 0.48rem !important;
    font-size: 0.68rem !important;
  }

  .learning-progress-course-metrics,
  .learning-progress-activity-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.42rem !important;
    margin-bottom: 0.55rem !important;
  }

  .learning-progress-course-bar,
  .learning-progress-detail-progress {
    margin-bottom: 0.55rem !important;
  }

  .learning-progress-course-actions,
  .learning-progress-detail-actions,
  .learning-progress-activity-actions {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.42rem !important;
  }

  .learning-progress-activity-row {
    gap: 0.52rem !important;
    padding: 0.62rem !important;
    border-radius: 14px !important;
  }

  .learning-progress-activity-main {
    flex-direction: row !important;
    gap: 0.52rem !important;
  }

  .learning-progress-activity-seq {
    min-width: 34px !important;
    width: 34px !important;
    height: 34px !important;
    border-radius: 10px !important;
    font-size: 0.76rem !important;
  }

  .learning-progress-activity-copy h5 {
    margin-top: 0.18rem !important;
    font-size: 0.9rem !important;
    line-height: 1.25 !important;
  }

  .learning-progress-activity-copy p,
  .learning-progress-activity-stat small {
    display: none !important;
  }

  .moodle-course-grid {
    grid-template-columns: 1fr !important;
    gap: 0.55rem !important;
  }

  .bridge-designer-course-list {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .bridge-designer-course-card {
    padding: 0.9rem;
    border-radius: 16px;
  }

  .bridge-designer-course-card .btn-primary {
    width: 100%;
  }

  .moodle-course-card .course-cover,
  .bridge-class-card .bridge-class-card-hero {
    min-height: 78px !important;
    padding: 0.62rem !important;
  }

  .bridge-class-card-accent {
    min-height: 96px !important;
    padding: 0.68rem !important;
    gap: 0.44rem !important;
  }

  .bridge-class-card::after {
    display: none !important;
  }

  .moodle-course-card .course-cover-top,
  .bridge-class-card-meta {
    gap: 0.32rem !important;
  }

  .moodle-course-card .course-category,
  .moodle-course-card .enrolled-badge,
  .bridge-class-card-subject,
  .bridge-class-enrolled,
  .bridge-class-card .bridge-class-badge,
  .class-stats span {
    min-height: 24px !important;
    padding: 0.22rem 0.46rem !important;
    font-size: 0.66rem !important;
  }

  .moodle-course-card .course-body,
  .bridge-class-card-body,
  .class-card {
    padding: 0.62rem !important;
    gap: 0.5rem !important;
  }

  .bridge-class-card-body {
    min-height: 104px !important;
  }

  .bridge-class-card-cover-top {
    gap: 0.45rem !important;
  }

  .bridge-class-card-kicker,
  .bridge-class-card-cover-note,
  .bridge-class-teacher {
    display: none !important;
  }

  .bridge-class-card-title {
    font-size: 0.96rem !important;
    line-height: 1.22 !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 1 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
  }

  .moodle-course-card .course-summary,
  .bridge-class-card-desc,
  .class-info p {
    -webkit-line-clamp: 1 !important;
  }

  .bridge-class-card-meta {
    margin-top: 0.12rem !important;
    padding-top: 0.52rem !important;
    gap: 0.38rem !important;
  }

  .bridge-class-stats,
  .bridge-class-meta-right {
    gap: 0.42rem !important;
  }

  .bridge-class-stat,
  .bridge-class-open-link {
    font-size: 0.72rem !important;
    line-height: 1.15 !important;
  }

  .bridge-class-card .teacher-badge,
  .bridge-class-card .course-teacher,
  .class-card .teacher-badge {
    display: none !important;
  }

  .participants-table tr.participant-row {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.35rem 0.65rem !important;
    padding: 0.68rem !important;
    border-radius: 14px !important;
  }

  .participants-table td {
    display: block !important;
    padding: 0.2rem 0 !important;
  }

  .participants-table td::before {
    display: block !important;
    margin-bottom: 0.08rem !important;
    font-size: 0.62rem !important;
    line-height: 1.1 !important;
    letter-spacing: 0.03em !important;
  }

  .participants-table td:first-child,
  .participants-table td[data-label*="Email"],
  .participants-table td[data-label*="電子"],
  .participants-table td[data-label*="Action"],
  .participants-table td[data-label*="操作"],
  .participants-table td[data-label*="Progress"],
  .participants-table td[data-label*="進度"] {
    grid-column: 1 / -1 !important;
  }

  .participants-table td:first-child {
    padding-bottom: 0.4rem !important;
  }

  .participants-table td:first-child::before,
  .participants-table td[data-label*="Email"]::before,
  .participants-table td[data-label*="電子"]::before {
    display: none !important;
  }

  .participants-table .participant-name-stack span,
  .participants-table .participant-role-chip {
    display: none !important;
  }

  .participants-table .participant-meta-stack {
    display: block !important;
  }

  .participants-table .participant-meta-stack > span:first-child {
    display: block !important;
    font-size: 0.82rem !important;
    color: var(--gray-600) !important;
  }

  .participants-table .participant-progress-cell {
    grid-template-columns: minmax(0, 1fr) auto !important;
    gap: 0.5rem !important;
  }

  .participants-table .participant-row-actions {
    gap: 0.42rem !important;
  }

  .participants-table .participant-row-actions .btn-sm {
    min-height: 36px !important;
    border-radius: 12px !important;
    font-size: 0.78rem !important;
  }

  .course-roster-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  }

  .course-roster-side-card-body {
    padding: 0.68rem !important;
  }

  .course-roster-side-actions {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.42rem !important;
  }

  .course-roster-side-actions .bridge-secondary-btn,
  .course-roster-side-actions .bridge-primary-btn,
  .course-roster-side-card .bridge-primary-btn {
    width: 100% !important;
    min-width: 0 !important;
    min-height: 36px !important;
    padding: 0.42rem 0.5rem !important;
    font-size: 0.76rem !important;
  }

  .notification-panel.active {
    position: fixed !important;
    top: calc(env(safe-area-inset-top, 0px) + 72px) !important;
    right: 0.65rem !important;
    left: 0.65rem !important;
    width: auto !important;
    max-width: none !important;
    max-height: min(58dvh, 500px) !important;
    border-radius: 18px !important;
    overflow: hidden !important;
    background: rgba(255, 255, 255, 0.98) !important;
    box-shadow: 0 18px 42px rgba(15, 23, 42, 0.18) !important;
  }

  .notification-panel .notification-header {
    padding: 0.68rem !important;
    gap: 0.45rem !important;
    min-height: 0 !important;
  }

  .notification-panel .notification-header-kicker,
  .notification-panel .notification-header-meta {
    display: none !important;
  }

  .notification-panel .notification-header h3 {
    font-size: 1rem !important;
    line-height: 1.15 !important;
  }

  .notification-panel .notification-header-actions {
    gap: 0.35rem !important;
  }

  .notification-panel .notification-header-action,
  .notification-panel .notification-close-btn {
    width: auto !important;
    min-width: 36px !important;
    min-height: 36px !important;
    padding: 0.36rem 0.5rem !important;
    border-radius: 12px !important;
    font-size: 0.72rem !important;
  }

  .notification-panel .notification-list {
    max-height: calc(min(58dvh, 500px) - 116px) !important;
    padding: 0.52rem !important;
    gap: 0.45rem !important;
  }

  .notification-panel .notification-item {
    grid-template-columns: 34px minmax(0, 1fr) !important;
    gap: 0.52rem !important;
    padding: 0.58rem !important;
    border-radius: 13px !important;
  }

  .notification-panel .notification-icon {
    width: 34px !important;
    height: 34px !important;
    border-radius: 10px !important;
  }

  .notification-panel .notification-content .title {
    margin-bottom: 0.08rem !important;
    font-size: 0.9rem !important;
    line-height: 1.22 !important;
  }

  .notification-panel .notification-content .message {
    font-size: 0.78rem !important;
    line-height: 1.32 !important;
    -webkit-line-clamp: 1 !important;
  }

  .notification-panel .notification-content .time {
    margin-top: 0.22rem !important;
    padding: 0.14rem 0.42rem !important;
    font-size: 0.66rem !important;
  }

  .notification-panel-footer {
    padding: 0.52rem !important;
  }

  .notification-panel-link {
    min-height: 36px !important;
    padding: 0.4rem 0.62rem !important;
    border-radius: 999px !important;
    font-size: 0.78rem !important;
  }

  .activity-picker-page {
    padding: 0.72rem !important;
    gap: 0.82rem !important;
  }

  .activity-picker-header {
    gap: 0.55rem !important;
  }

  .activity-picker-title {
    gap: 0.58rem !important;
  }

  .activity-picker-icon {
    width: 42px !important;
    height: 42px !important;
    border-radius: 14px !important;
  }

  .activity-picker-copy h2 {
    font-size: 1.16rem !important;
    line-height: 1.2 !important;
  }

  .activity-picker-copy p {
    margin-top: 0.15rem !important;
    font-size: 0.8rem !important;
    line-height: 1.35 !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 1 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
  }

  .activity-picker-grid {
    gap: 0.82rem !important;
  }

  .activity-picker-card {
    border-radius: 16px !important;
  }

  .activity-picker-card-accent {
    min-height: 94px !important;
    padding: 0.68rem !important;
    gap: 0.5rem !important;
  }

  .activity-picker-card-head {
    gap: 0.4rem !important;
  }

  .activity-picker-card-chip,
  .activity-picker-card-code {
    min-height: 22px !important;
    padding: 0.25rem 0.5rem !important;
    font-size: 0.66rem !important;
  }

  .activity-picker-card-hero {
    min-height: 0 !important;
    padding: 0 !important;
    gap: 0.22rem !important;
  }

  .activity-picker-card-title {
    font-size: 1.02rem !important;
    line-height: 1.22 !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 1 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
  }

  .activity-picker-card-kicker {
    font-size: 0.72rem !important;
  }

  .activity-picker-card-body {
    min-height: 0 !important;
    padding: 0.68rem !important;
    gap: 0.5rem !important;
  }

  .activity-picker-card-summary {
    font-size: 0.82rem !important;
    line-height: 1.42 !important;
    -webkit-line-clamp: 2 !important;
  }

  .activity-picker-card-footer {
    margin-top: 0 !important;
    padding-top: 0.5rem !important;
    gap: 0.46rem !important;
  }

  .activity-picker-card-teacher {
    font-size: 0.72rem !important;
  }

  .activity-picker-card-link {
    min-height: 34px !important;
    padding: 0.4rem 0.62rem !important;
    font-size: 0.74rem !important;
  }

  .notification-panel.active {
    top: calc(env(safe-area-inset-top, 0px) + 62px) !important;
    bottom: auto !important;
    max-height: min(42dvh, 340px) !important;
    height: auto !important;
    background: #fff !important;
  }

  .notification-panel .notification-list {
    max-height: calc(min(42dvh, 340px) - 104px) !important;
  }

  .notification-panel .notification-header button,
  .notification-panel-link {
    border: 0 !important;
    outline: none !important;
  }

  .notification-empty {
    min-height: 72px !important;
    padding: 1rem 0.75rem !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
  }

  .notification-panel-link {
    background: rgba(45, 43, 107, 0.08) !important;
    box-shadow: none !important;
  }

  .course-roster-main-card .participants-table tr.participant-row,
  .participants-table tr.participant-row {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 0.34rem !important;
    padding: 0.64rem !important;
  }

  .course-roster-main-card .participants-table td,
  .participants-table td {
    display: block !important;
    grid-template-columns: none !important;
    gap: 0 !important;
    padding: 0.14rem 0 !important;
  }

  .course-roster-main-card .participants-table td::before,
  .participants-table td::before {
    display: none !important;
  }

  .course-roster-main-card .participants-table td[data-label*="報名"],
  .course-roster-main-card .participants-table td[data-label*="最後"],
  .course-roster-main-card .participants-table td[data-label*="Enroll"],
  .course-roster-main-card .participants-table td[data-label*="Last"],
  .participants-table td[data-label*="報名"],
  .participants-table td[data-label*="最後"],
  .participants-table td[data-label*="Enroll"],
  .participants-table td[data-label*="Last"] {
    display: none !important;
  }

  .course-roster-main-card .participants-table td:first-child,
  .participants-table td:first-child {
    padding: 0 0 0.44rem !important;
  }

  .course-roster-main-card .participants-table .user-cell,
  .participants-table .user-cell {
    display: grid !important;
    grid-template-columns: 38px minmax(0, 1fr) !important;
    align-items: center !important;
    gap: 0.55rem !important;
  }

  .course-roster-main-card .participants-table .participant-meta-stack,
  .participants-table .participant-meta-stack {
    padding-top: 0.38rem !important;
    border-top: 1px solid rgba(26, 58, 92, 0.08) !important;
  }

  .course-roster-main-card .participants-table .participant-progress-cell,
  .participants-table .participant-progress-cell {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) auto !important;
    align-items: center !important;
    gap: 0.5rem !important;
  }

  .course-roster-main-card .participants-table .participants-actions-cell,
  .participants-table .participants-actions-cell {
    padding-top: 0.44rem !important;
  }

  .teacher-score-table tr {
    gap: 0.08rem !important;
    padding: 0.62rem !important;
    border-radius: 14px !important;
  }

  .teacher-score-table td {
    grid-template-columns: minmax(5.8rem, 38%) minmax(0, 1fr) !important;
    gap: 0.42rem !important;
    padding: 0.28rem 0 !important;
  }

  .teacher-score-table td.sticky-col {
    padding-bottom: 0.38rem !important;
  }

  .teacher-score-table .student-info {
    gap: 0.52rem !important;
  }

  .teacher-score-table .student-avatar {
    width: 38px !important;
    height: 38px !important;
    min-width: 38px !important;
    font-size: 0.82rem !important;
  }

  .teacher-score-table .student-info small {
    display: none !important;
  }

  .teacher-score-table .total-cell {
    margin-top: 0.12rem !important;
    padding: 0.38rem 0.5rem !important;
  }
}

@media (max-width: 420px) {
  .dashboard,
  .learning-progress-shell,
  .learning-progress-detail,
  .management-detail-page,
  .assignment-detail,
  .teacher-gradebook,
  .completion-settings-page,
  .license-dashboard {
    padding: 0.58rem !important;
  }

  .dashboard-greeting .greeting-stats,
  .stats-grid,
  .pending-tasks-grid,
  .dashboard-badge-grid,
  .learning-progress-summary-grid,
  .learning-progress-course-metrics,
  .learning-progress-activity-stats,
  .course-roster-metrics {
    gap: 0.38rem !important;
  }

  .stat-card,
  .learning-progress-course-card,
  .participants-table tr.participant-row,
  .course-roster-side-card-body,
  .settings-hero-body,
  .settings-panel-body,
  .settings-panel .card-body {
    padding: 0.58rem !important;
  }

  .settings-hero-meta-card,
  .learning-progress-summary-card,
  .learning-progress-metric,
  .learning-progress-activity-stat {
    padding: 0.42rem !important;
  }
}

/* Mobile page compaction pass for course, assignments, forums, and gradebook. */
@media (max-width: 768px) {
  .course-hero,
  .assignment-hero,
  .forum-header-panel,
  .forum-thread-panel.is-hero {
    position: relative !important;
  }

  .course-header .back-btn,
  .assignment-back-btn,
  .forum-header-panel .forum-back-btn,
  .forum-thread-panel.is-hero .forum-back-btn {
    position: absolute !important;
    top: 0.6rem !important;
    left: 0.6rem !important;
    z-index: 5 !important;
    width: 34px !important;
    min-width: 34px !important;
    height: 34px !important;
    min-height: 34px !important;
    padding: 0 !important;
    border-radius: 999px !important;
    font-size: 0 !important;
    line-height: 0 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    box-shadow: none !important;
  }

  .course-header .back-btn,
  .assignment-back-btn {
    background: rgba(255, 255, 255, 0.14) !important;
    color: #fff !important;
    border-color: rgba(255, 255, 255, 0.18) !important;
  }

  .forum-header-panel .forum-back-btn,
  .forum-thread-panel.is-hero .forum-back-btn {
    background: rgba(26, 58, 92, 0.06) !important;
    color: var(--navy) !important;
    border-color: rgba(26, 58, 92, 0.08) !important;
  }

  .course-header .back-btn svg,
  .assignment-back-btn svg,
  .forum-header-panel .forum-back-btn svg,
  .forum-thread-panel.is-hero .forum-back-btn svg {
    width: 17px !important;
    height: 17px !important;
    margin: 0 !important;
  }

  .course-hero-top,
  .assignment-hero-top,
  .forum-header-top,
  .forum-thread-top {
    min-height: 34px !important;
    padding-left: 42px !important;
    margin-bottom: 0.42rem !important;
    align-items: center !important;
  }

  .course-header {
    padding: 0.58rem !important;
  }

  .course-hero {
    gap: 0.34rem !important;
  }

  .course-header-info h1 {
    font-size: 1.02rem !important;
    line-height: 1.18 !important;
    -webkit-line-clamp: 1 !important;
  }

  .course-header-info > p:not(.course-header-kicker) {
    margin-top: 0.18rem !important;
    font-size: 0.74rem !important;
    line-height: 1.28 !important;
    -webkit-line-clamp: 1 !important;
  }

  .course-header-kicker,
  .assignment-kicker,
  .forum-header-subtitle,
  .forum-thread-subtitle {
    display: none !important;
  }

  .course-hero-badges,
  .course-header-meta,
  .forum-count-row,
  .forum-thread-meta {
    gap: 0.26rem !important;
  }

  .course-hero-badges .course-category-badge,
  .course-hero-badges .course-hero-badge,
  .course-enrolled-pill,
  .course-format-badge,
  .course-header-meta span,
  .forum-chip,
  .forum-thread-count-pill {
    min-height: 24px !important;
    padding: 0.2rem 0.44rem !important;
    font-size: 0.66rem !important;
    line-height: 1.1 !important;
    white-space: nowrap !important;
  }

  .course-mobile-more {
    margin-top: 0.26rem !important;
  }

  .course-mobile-more summary {
    min-height: 27px !important;
    padding: 0.24rem 0.46rem !important;
  }

  .course-header-actions {
    margin-top: 0.34rem !important;
  }

  .course-header-stat-grid {
    display: none !important;
  }

  .course-nav-tabs {
    overflow-x: auto !important;
    scrollbar-width: none !important;
  }

  .course-nav-tabs::-webkit-scrollbar {
    display: none !important;
  }

  .activity-shell-header {
    padding: 0.54rem 0.68rem 0.16rem !important;
    gap: 0.42rem !important;
    align-items: flex-start !important;
  }

  .activity-shell-heading {
    display: grid !important;
    grid-template-columns: 34px minmax(0, 1fr) !important;
    gap: 0.48rem !important;
    align-items: start !important;
    min-width: 0 !important;
  }

  .activity-back-btn {
    width: 34px !important;
    min-width: 34px !important;
    height: 34px !important;
    min-height: 34px !important;
    padding: 0 !important;
    border-radius: 999px !important;
  }

  .activity-shell-copy {
    min-width: 0 !important;
  }

  .activity-shell-copy h2 {
    font-size: 1.04rem !important;
    line-height: 1.18 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .activity-shell-copy p {
    display: none !important;
  }

  .activity-shell-meta {
    margin-top: 0.28rem !important;
    gap: 0.26rem !important;
  }

  .activity-chip {
    min-height: 23px !important;
    padding: 0.18rem 0.42rem !important;
    font-size: 0.64rem !important;
  }

  .activity-shell-header > .btn-primary {
    min-height: 32px !important;
    padding: 0.34rem 0.56rem !important;
    border-radius: 11px !important;
    font-size: 0.72rem !important;
    white-space: nowrap !important;
  }

  .activity-shell-list {
    padding: 0 0.68rem 0.68rem !important;
  }

  .assignment-hero {
    padding: 0.62rem !important;
    border-radius: 15px !important;
  }

  .assignment-hero-top {
    justify-content: flex-end !important;
  }

  .assignment-hero-actions {
    gap: 0.34rem !important;
    max-width: calc(100% - 42px) !important;
    justify-content: flex-end !important;
  }

  .assignment-status {
    min-height: 30px !important;
    padding: 0.32rem 0.58rem !important;
    border-radius: 999px !important;
    font-size: 0.7rem !important;
  }

  .assignment-info h1 {
    margin-top: 0 !important;
    font-size: 1.04rem !important;
    line-height: 1.18 !important;
    -webkit-line-clamp: 2 !important;
  }

  .assignment-subtitle {
    margin-top: 0.16rem !important;
    font-size: 0.74rem !important;
    -webkit-line-clamp: 1 !important;
  }

  .assignment-meta-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.4rem !important;
    margin-top: 0.55rem !important;
  }

  .assignment-meta-item {
    min-height: 0 !important;
    padding: 0.46rem 0.52rem !important;
    border-radius: 11px !important;
    gap: 0.14rem !important;
  }

  .assignment-meta-item:first-child {
    display: none !important;
  }

  .assignment-meta-item:nth-child(2) {
    grid-column: 1 / -1 !important;
  }

  .assignment-meta-item .label {
    font-size: 0.6rem !important;
    letter-spacing: 0.02em !important;
  }

  .assignment-meta-item .value {
    font-size: 0.8rem !important;
    line-height: 1.18 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .assignment-panel {
    padding: 0.68rem !important;
    border-radius: 15px !important;
  }

  .assignment-panel-head {
    margin-bottom: 0.44rem !important;
  }

  .assignment-panel-note {
    display: none !important;
  }

  .assignment-body {
    font-size: 0.84rem !important;
    line-height: 1.48 !important;
  }

  .assignment-card,
  .quiz-card {
    display: grid !important;
    grid-template-columns: 38px minmax(0, 1fr) !important;
    gap: 0.58rem !important;
    padding: 0.68rem !important;
    border-radius: 15px !important;
    margin-bottom: 0.52rem !important;
    align-items: start !important;
    min-height: 0 !important;
  }

  .quiz-card-main {
    display: contents !important;
  }

  .quiz-card > .activity-card-footer {
    grid-column: 1 / -1 !important;
    margin-left: calc(38px + 0.58rem) !important;
  }

  .assignment-icon,
  .quiz-icon {
    width: 38px !important;
    min-width: 38px !important;
    height: 38px !important;
    min-height: 38px !important;
    border-radius: 12px !important;
  }

  .assignment-icon svg,
  .quiz-icon svg {
    width: 18px !important;
    height: 18px !important;
  }

  .activity-card-main,
  .quiz-card-content {
    min-width: 0 !important;
    gap: 0.4rem !important;
  }

  .activity-card-topline {
    gap: 0.42rem !important;
    align-items: flex-start !important;
  }

  .activity-card-kicker {
    display: none !important;
  }

  .assignment-info h3,
  .quiz-info h3,
  .activity-card-title {
    margin: 0 !important;
    font-size: 0.98rem !important;
    line-height: 1.2 !important;
    -webkit-line-clamp: 2 !important;
  }

  .activity-status-chip {
    min-height: 24px !important;
    padding: 0.2rem 0.44rem !important;
    font-size: 0.64rem !important;
    white-space: nowrap !important;
  }

  .activity-card-description {
    margin-top: 0.18rem !important;
    font-size: 0.74rem !important;
    line-height: 1.3 !important;
    -webkit-line-clamp: 1 !important;
  }

  .activity-card-meta {
    gap: 0.25rem !important;
  }

  .activity-card-meta span {
    max-width: 100% !important;
    min-height: 22px !important;
    padding: 0.18rem 0.38rem !important;
    font-size: 0.64rem !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .activity-card-meta span:nth-child(n+3) {
    display: none !important;
  }

  .activity-card-footer {
    gap: 0.38rem !important;
    align-items: center !important;
  }

  .activity-card-open,
  .activity-card-open-btn,
  .activity-inline-action {
    min-height: 30px !important;
    padding: 0.3rem 0.54rem !important;
    font-size: 0.7rem !important;
    white-space: nowrap !important;
  }

  .student-grades {
    gap: 0.62rem !important;
  }

  .student-grades .gradebook-shell {
    padding: 0.68rem !important;
    border-radius: 15px !important;
  }

  .student-grades .gradebook-shell-head {
    margin-bottom: 0.48rem !important;
  }

  .student-grades .gradebook-shell-title {
    font-size: 1rem !important;
    line-height: 1.18 !important;
  }

  .student-grades .gradebook-shell-desc {
    display: none !important;
  }

  .student-grades .grade-summary {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.48rem !important;
    margin: 0 0 0.62rem !important;
  }

  .student-grades .summary-card {
    min-height: 0 !important;
    padding: 0.66rem !important;
    border-radius: 14px !important;
  }

  .student-grades .summary-value {
    font-size: 1.55rem !important;
    line-height: 1 !important;
  }

  .student-grades .summary-label {
    margin-top: 0.22rem !important;
    font-size: 0.66rem !important;
    letter-spacing: 0.02em !important;
  }

  .student-grades .gradebook-table-wrapper {
    overflow: visible !important;
    border: 0 !important;
    background: transparent !important;
  }

  .student-grades .gradebook-table {
    display: block !important;
    min-width: 0 !important;
    border-spacing: 0 !important;
  }

  .student-grades .gradebook-table thead {
    display: none !important;
  }

  .student-grades .gradebook-table tbody {
    display: grid !important;
    gap: 0.45rem !important;
  }

  .student-grades .gradebook-table tr {
    display: grid !important;
    gap: 0.18rem !important;
    padding: 0.62rem !important;
    border: 1px solid rgba(26, 58, 92, 0.08) !important;
    border-radius: 13px !important;
    background: rgba(255, 255, 255, 0.94) !important;
  }

  .student-grades .gradebook-table td {
    display: grid !important;
    grid-template-columns: 5rem minmax(0, 1fr) !important;
    gap: 0.42rem !important;
    padding: 0.16rem 0 !important;
    border: 0 !important;
    align-items: baseline !important;
  }

  /* Score cell: keep "8 / 8" on one line */
  .student-grades .gradebook-table td:nth-child(3) {
    white-space: nowrap !important;
  }

  .student-grades .gradebook-table td:nth-child(3) strong {
    display: inline !important;
    margin-right: 0.25rem !important;
  }
    text-align: right !important;
    white-space: normal !important;
    min-width: 0 !important;
  }

  .student-grades .gradebook-table td::before {
    content: attr(data-label);
    color: var(--gray-500);
    font-size: 0.66rem;
    font-weight: 800;
    letter-spacing: 0.02em;
    line-height: 1.2;
    text-align: left;
  }

  .student-grades .gradebook-table td:first-child {
    display: block !important;
    padding-bottom: 0.36rem !important;
    border-bottom: 1px solid rgba(26, 58, 92, 0.08) !important;
    text-align: left !important;
    font-weight: 800 !important;
  }

  .student-grades .gradebook-table td:first-child::before {
    display: none !important;
  }

  .forum-header-panel,
  .forum-thread-panel.is-hero {
    padding: 0.68rem !important;
    gap: 0.48rem !important;
    border-radius: 16px !important;
  }

  .forum-header-copy,
  .forum-thread-copy {
    min-width: 0 !important;
    gap: 0.26rem !important;
  }

  .forum-header-title,
  .forum-thread-title {
    font-size: 1.08rem !important;
    line-height: 1.2 !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 2 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
  }

  .forum-header-actions {
    gap: 0.34rem !important;
    margin-left: auto !important;
  }

  .forum-header-actions .btn-secondary,
  .forum-header-actions .btn-primary {
    min-height: 31px !important;
    padding: 0.3rem 0.52rem !important;
    border-radius: 10px !important;
    font-size: 0.68rem !important;
    white-space: nowrap !important;
  }

  .forum-card {
    display: grid !important;
    grid-template-columns: 38px minmax(0, 1fr) !important;
    gap: 0.58rem !important;
    padding: 0.68rem !important;
    border-radius: 15px !important;
    min-height: 0 !important;
  }

  .forum-card-icon {
    width: 38px !important;
    height: 38px !important;
    border-radius: 12px !important;
  }

  .forum-card-content {
    min-width: 0 !important;
    gap: 0.38rem !important;
  }

  .forum-card-title-row {
    gap: 0.3rem !important;
  }

  .forum-type-badge {
    min-height: 22px !important;
    padding: 0.16rem 0.4rem !important;
    font-size: 0.62rem !important;
    white-space: nowrap !important;
  }

  .forum-card-title {
    font-size: 0.98rem !important;
    line-height: 1.2 !important;
    -webkit-line-clamp: 2 !important;
  }

  .forum-card-meta {
    font-size: 0.68rem !important;
    line-height: 1.2 !important;
  }

  .forum-card-description {
    font-size: 0.76rem !important;
    line-height: 1.34 !important;
    -webkit-line-clamp: 2 !important;
  }

  .forum-card-stats {
    gap: 0.28rem !important;
  }

  .forum-card-stat {
    min-height: 23px !important;
    padding: 0.18rem 0.42rem !important;
    font-size: 0.64rem !important;
  }

  .forum-card-footer {
    padding-top: 0.42rem !important;
    gap: 0.34rem !important;
  }

  .forum-card-support {
    display: none !important;
  }

  .forum-card-cta {
    min-height: 29px !important;
    padding: 0.3rem 0.52rem !important;
    font-size: 0.68rem !important;
    white-space: nowrap !important;
  }
}

@media (max-width: 420px) {
  .course-header .back-btn,
  .assignment-back-btn,
  .forum-header-panel .forum-back-btn,
  .forum-thread-panel.is-hero .forum-back-btn,
  .activity-back-btn {
    width: 32px !important;
    min-width: 32px !important;
    height: 32px !important;
    min-height: 32px !important;
  }

  .course-hero-top,
  .assignment-hero-top,
  .forum-header-top,
  .forum-thread-top {
    min-height: 32px !important;
    padding-left: 39px !important;
  }

  .assignment-card,
  .quiz-card,
  .forum-card {
    grid-template-columns: 36px minmax(0, 1fr) !important;
    gap: 0.52rem !important;
    padding: 0.62rem !important;
  }

  .assignment-icon,
  .quiz-icon,
  .forum-card-icon {
    width: 36px !important;
    min-width: 36px !important;
    height: 36px !important;
    min-height: 36px !important;
  }

  .student-grades .summary-card {
    padding: 0.58rem !important;
  }

  .quiz-card > .activity-card-footer {
    margin-left: calc(36px + 0.52rem) !important;
  }
}

/* Normalize remaining mobile back controls so they do not reserve a full row. */
@media (max-width: 768px) {
  .quiz-info-page,
  .management-detail-page,
  .learning-progress-detail,
  .video-player-header,
  .course-page-header,
  .gradebook-management,
  .groups-manager-container {
    position: relative !important;
  }

  .quiz-info-back-btn,
  .management-back-link,
  .learning-progress-detail > .btn-back,
  .course-page-header .back-btn,
  .video-player-back-btn,
  .gradebook-header .back-btn,
  .group-back-btn {
    width: 34px !important;
    min-width: 34px !important;
    height: 34px !important;
    min-height: 34px !important;
    padding: 0 !important;
    border-radius: 999px !important;
    font-size: 0 !important;
    line-height: 0 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 0 !important;
    box-shadow: none !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    flex: 0 0 34px !important;
  }

  .quiz-info-back-btn,
  .management-back-link,
  .learning-progress-detail > .btn-back,
  .gradebook-header .back-btn,
  .group-back-btn {
    background: rgba(26, 58, 92, 0.06) !important;
    color: var(--navy) !important;
    border: 1px solid rgba(26, 58, 92, 0.08) !important;
  }

  .course-page-header .back-btn,
  .video-player-back-btn {
    background: rgba(255, 255, 255, 0.14) !important;
    color: #fff !important;
    border: 1px solid rgba(255, 255, 255, 0.18) !important;
  }

  .quiz-info-back-btn,
  .management-back-link,
  .learning-progress-detail > .btn-back,
  .course-page-header .back-btn,
  .gradebook-header .back-btn {
    position: absolute !important;
    top: 0.68rem !important;
    left: 0.68rem !important;
    z-index: 4 !important;
    margin: 0 !important;
  }

  .quiz-info-header,
  .management-detail-header,
  .gradebook-header {
    min-height: 34px !important;
    padding-left: 42px !important;
  }

  .quiz-info-header {
    margin: 0 0 0.72rem !important;
  }

  .learning-progress-detail-hero,
  .course-page-header {
    padding-left: calc(0.72rem + 42px) !important;
  }

  .video-player-header-main {
    display: grid !important;
    grid-template-columns: 34px minmax(0, 1fr) !important;
    align-items: center !important;
    gap: 0.5rem !important;
  }

  .video-player-back-btn {
    position: static !important;
  }

  .quiz-info-back-btn .quiz-info-back-icon {
    width: auto !important;
    height: auto !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
  }

  .quiz-info-back-btn svg,
  .management-back-link svg,
  .video-player-back-btn svg,
  .gradebook-header .back-btn svg {
    width: 17px !important;
    height: 17px !important;
    margin: 0 !important;
  }

  .quiz-info-back-btn span:not(.quiz-info-back-icon),
  .management-back-link span,
  .video-player-back-btn span,
  .gradebook-header .back-btn span {
    display: none !important;
  }

  .learning-progress-detail > .btn-back::before,
  .course-page-header .back-btn::before,
  .group-back-btn::before {
    content: "<";
    display: block;
    font-size: 1.05rem;
    font-weight: 800;
    line-height: 1;
  }

  .rubrics-container > .btn-back {
    width: auto !important;
    min-height: 32px !important;
    padding: 0.3rem 0.6rem !important;
    margin-bottom: 0.46rem !important;
    border-radius: 999px !important;
    font-size: 0.7rem !important;
    line-height: 1 !important;
    box-shadow: none !important;
  }

  .groups-manager-container .management-header {
    align-items: center !important;
    gap: 0.5rem !important;
  }

  .groups-manager-container .management-inline-actions {
    gap: 0.34rem !important;
    flex-wrap: nowrap !important;
  }

  .groups-manager-container .bridge-secondary-btn,
  .groups-manager-container .bridge-primary-btn {
    white-space: nowrap !important;
  }
}

@media (max-width: 420px) {
  .quiz-info-back-btn,
  .management-back-link,
  .learning-progress-detail > .btn-back,
  .course-page-header .back-btn,
  .video-player-back-btn,
  .gradebook-header .back-btn,
  .group-back-btn {
    width: 32px !important;
    min-width: 32px !important;
    height: 32px !important;
    min-height: 32px !important;
    flex-basis: 32px !important;
  }

  .quiz-info-header,
  .management-detail-header,
  .gradebook-header {
    padding-left: 39px !important;
  }

  .learning-progress-detail-hero,
  .course-page-header {
    padding-left: calc(0.64rem + 39px) !important;
  }

  .video-player-header-main {
    grid-template-columns: 32px minmax(0, 1fr) !important;
  }
}

/* Mobile follow-up: keep dense action rows and left-aligned discussion/profile headers. */
@media (max-width: 768px) {
  .quiz-card > .activity-card-footer {
    grid-column: 2 / -1 !important;
    width: 100% !important;
    min-width: 0 !important;
    margin-left: 0 !important;
    gap: 0.4rem !important;
    align-items: stretch !important;
  }

  .quiz-card:not(.is-teacher-card) > .activity-card-footer {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  }

  .quiz-card.is-teacher-card > .activity-card-footer {
    display: flex !important;
    flex-wrap: wrap !important;
  }

  .quiz-card > .activity-card-footer .quiz-status {
    width: 100% !important;
    min-width: 0 !important;
    display: flex !important;
  }

  .quiz-card > .activity-card-footer .quiz-status:empty {
    display: none !important;
  }

  .quiz-card > .activity-card-footer .score {
    width: 100% !important;
    min-width: 0 !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
  }

  .quiz-card > .activity-card-footer .activity-inline-action,
  .quiz-card > .activity-card-footer .activity-card-open-btn {
    width: 100% !important;
    min-width: 0 !important;
    min-height: 34px !important;
    padding: 0.42rem 0.46rem !important;
    border-radius: 11px !important;
    font-size: 0.7rem !important;
    line-height: 1.12 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .quiz-card > .activity-card-footer .activity-card-open-btn {
    background: rgba(26, 58, 92, 0.06) !important;
  }

  .forum-header-panel,
  .forum-thread-panel.is-hero {
    min-height: 0 !important;
    padding: 0.62rem !important;
    gap: 0.42rem !important;
    align-items: stretch !important;
  }

  .forum-header-top,
  .forum-thread-top {
    width: 100% !important;
    min-height: 0 !important;
    padding: 0 0 0 39px !important;
    margin: 0 !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: stretch !important;
    justify-content: flex-start !important;
    gap: 0.38rem !important;
  }

  .forum-header-cluster {
    width: 100% !important;
    min-width: 0 !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: flex-start !important;
    justify-content: flex-start !important;
    gap: 0.32rem !important;
  }

  .forum-header-copy,
  .forum-thread-copy,
  .forum-thread-title-row {
    width: 100% !important;
    min-width: 0 !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: flex-start !important;
    justify-content: flex-start !important;
    text-align: left !important;
    gap: 0.26rem !important;
  }

  .forum-header-title,
  .forum-thread-title {
    width: 100% !important;
    text-align: left !important;
    font-size: 1.04rem !important;
    line-height: 1.16 !important;
    -webkit-line-clamp: 2 !important;
  }

  .forum-header-subtitle,
  .forum-thread-subtitle {
    display: none !important;
  }

  .forum-header-actions,
  .forum-thread-actions,
  .forum-thread-actions .category-actions {
    width: 100% !important;
    min-width: 0 !important;
    margin-left: 0 !important;
    justify-content: flex-start !important;
    align-items: center !important;
    gap: 0.34rem !important;
    flex-wrap: wrap !important;
  }

  .forum-header-actions .btn-secondary,
  .forum-header-actions .btn-primary,
  .forum-thread-actions .btn-secondary,
  .forum-thread-actions .btn-primary,
  .forum-thread-actions .btn-sm {
    width: auto !important;
    min-width: 0 !important;
    min-height: 30px !important;
    padding: 0.3rem 0.5rem !important;
    border-radius: 10px !important;
    font-size: 0.68rem !important;
    line-height: 1.1 !important;
    white-space: nowrap !important;
  }

  .forum-count-row,
  .forum-thread-meta {
    width: 100% !important;
    gap: 0.3rem !important;
    margin-top: 0.16rem !important;
    justify-content: flex-start !important;
  }

  .forum-thread-count-pill,
  .forum-chip,
  .forum-card-stat,
  .forum-topic-stat {
    min-height: 25px !important;
    padding: 0.2rem 0.44rem !important;
    font-size: 0.66rem !important;
    line-height: 1.1 !important;
  }

  .forum-inline-composer {
    grid-template-columns: 34px minmax(0, 1fr) !important;
    gap: 0.5rem !important;
    padding: 0.66rem !important;
  }

  .forum-inline-composer-avatar {
    width: 34px !important;
    height: 34px !important;
    border-radius: 11px !important;
  }

  .forum-inline-composer-input {
    min-height: 74px !important;
    padding: 0.64rem !important;
    font-size: 0.84rem !important;
  }

  .settings-hero-body {
    grid-template-columns: 44px minmax(0, 1fr) !important;
    align-items: center !important;
  }

  .settings-avatar-btn {
    grid-column: 1 / -1 !important;
    justify-self: start !important;
    width: auto !important;
    min-width: max-content !important;
    min-height: 30px !important;
    padding: 0.34rem 0.62rem !important;
    border-radius: 999px !important;
    font-size: 0.72rem !important;
    line-height: 1 !important;
    white-space: nowrap !important;
  }
}

@media (max-width: 420px) {
  .quiz-card > .activity-card-footer {
    grid-column: 2 / -1 !important;
    margin-left: 0 !important;
    gap: 0.34rem !important;
  }

  .quiz-card > .activity-card-footer .activity-inline-action,
  .quiz-card > .activity-card-footer .activity-card-open-btn {
    min-height: 32px !important;
    padding: 0.38rem 0.34rem !important;
    font-size: 0.66rem !important;
  }

  .forum-header-panel,
  .forum-thread-panel.is-hero {
    padding: 0.58rem !important;
  }

  .forum-header-top,
  .forum-thread-top {
    padding-left: 37px !important;
  }

  .settings-hero-meta-card {
    padding: 0.4rem 0.42rem !important;
  }
}

/* Keep activity list actions in the same compact information row. */
@media (max-width: 768px) {
  .assignment-card .activity-card-bottom-row,
  .quiz-card .activity-card-bottom-row {
    grid-column: 2 / -1 !important;
    width: 100% !important;
    margin-left: 0 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    gap: 0.32rem !important;
    flex-wrap: wrap !important;
    min-width: 0 !important;
  }

  .assignment-card .activity-card-bottom-row .activity-card-meta,
  .quiz-card .activity-card-bottom-row .activity-card-meta {
    flex: 1 1 7.5rem !important;
    min-width: 0 !important;
    gap: 0.24rem !important;
  }

  .assignment-card .activity-card-bottom-row .activity-card-footer,
  .quiz-card .activity-card-bottom-row .activity-card-footer {
    flex: 0 0 auto !important;
    width: auto !important;
    min-width: 0 !important;
    margin-left: auto !important;
    gap: 0.28rem !important;
    justify-content: flex-end !important;
    align-items: center !important;
  }

  .quiz-card:not(.is-teacher-card) .activity-card-bottom-row .activity-card-footer {
    display: flex !important;
    flex-wrap: nowrap !important;
  }

  .quiz-card .activity-card-bottom-row .quiz-status {
    width: auto !important;
    min-width: 0 !important;
    display: flex !important;
  }

  .quiz-card .activity-card-bottom-row .quiz-status:empty,
  .assignment-card .activity-card-bottom-row .assignment-status:empty {
    display: none !important;
  }

  .quiz-card .activity-card-bottom-row .score {
    width: auto !important;
    max-width: 6.8rem !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
  }

  .assignment-card .activity-card-bottom-row .activity-card-open,
  .quiz-card .activity-card-bottom-row .activity-card-open-btn,
  .quiz-card .activity-card-bottom-row .activity-inline-action {
    min-height: 30px !important;
    width: auto !important;
    max-width: 100% !important;
    padding: 0.3rem 0.5rem !important;
    border-radius: 10px !important;
    font-size: 0.68rem !important;
    line-height: 1.1 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .forum-card-bottom-row {
    grid-column: 2 / -1 !important;
    padding-top: 0.4rem !important;
    gap: 0.3rem !important;
    justify-content: space-between !important;
  }

  .forum-card-bottom-row .forum-card-stats {
    flex: 1 1 7.5rem !important;
    min-width: 0 !important;
    gap: 0.26rem !important;
  }

  .forum-card-bottom-row .forum-card-cta {
    min-height: 29px !important;
    padding: 0.3rem 0.5rem !important;
    border-radius: 10px !important;
    font-size: 0.68rem !important;
    white-space: nowrap !important;
  }
}

@media (max-width: 420px) {
  .assignment-card .activity-card-bottom-row,
  .quiz-card .activity-card-bottom-row {
    gap: 0.28rem !important;
  }

  .assignment-card .activity-card-bottom-row .activity-card-meta,
  .quiz-card .activity-card-bottom-row .activity-card-meta {
    flex: 1 1 100% !important;
  }

  .assignment-card .activity-card-bottom-row .activity-card-footer,
  .quiz-card .activity-card-bottom-row .activity-card-footer {
    flex: 1 1 100% !important;
    justify-content: flex-start !important;
    margin-left: 0 !important;
  }

  .quiz-card:not(.is-teacher-card) .activity-card-bottom-row .activity-card-footer {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  }

  .assignment-card .activity-card-bottom-row .activity-card-open,
  .quiz-card .activity-card-bottom-row .activity-card-open-btn,
  .quiz-card .activity-card-bottom-row .activity-inline-action {
    width: 100% !important;
    min-height: 31px !important;
    padding: 0.36rem 0.38rem !important;
    font-size: 0.66rem !important;
  }
}

/* Mobile hero back button placement polish. */
@media (max-width: 768px) {
  .course-header,
  .assignment-hero,
  .forum-header-panel,
  .forum-thread-panel.is-hero {
    position: relative !important;
  }

  .course-header .back-btn,
  .assignment-back-btn,
  .forum-header-panel .forum-back-btn,
  .forum-thread-panel.is-hero .forum-back-btn {
    position: absolute !important;
    top: 0.62rem !important;
    left: 0.62rem !important;
    z-index: 8 !important;
    width: 32px !important;
    min-width: 32px !important;
    height: 32px !important;
    min-height: 32px !important;
    flex: 0 0 32px !important;
    padding: 0 !important;
    border-radius: 999px !important;
    font-size: 0 !important;
    line-height: 0 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    margin: 0 !important;
    box-shadow: none !important;
  }

  .course-header .back-btn,
  .assignment-back-btn {
    background: rgba(255, 255, 255, 0.1) !important;
    color: #fff !important;
    border: 1px solid rgba(255, 255, 255, 0.18) !important;
  }

  .forum-header-panel .forum-back-btn,
  .forum-thread-panel.is-hero .forum-back-btn {
    background: rgba(26, 58, 92, 0.06) !important;
    color: var(--navy) !important;
    border: 1px solid rgba(26, 58, 92, 0.08) !important;
  }

  .course-header .back-btn svg,
  .assignment-back-btn svg,
  .forum-header-panel .forum-back-btn svg,
  .forum-thread-panel.is-hero .forum-back-btn svg {
    width: 16px !important;
    height: 16px !important;
    margin: 0 !important;
  }

  .course-header .back-btn span,
  .assignment-back-btn span,
  .forum-header-panel .forum-back-btn span,
  .forum-thread-panel.is-hero .forum-back-btn span {
    display: none !important;
  }

  .course-hero {
    padding-top: 2.08rem !important;
  }

  .course-hero-top {
    position: absolute !important;
    top: 0.62rem !important;
    right: 0.62rem !important;
    left: 2.98rem !important;
    min-height: 32px !important;
    padding: 0 !important;
    margin: 0 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: flex-end !important;
    gap: 0.3rem !important;
    flex-wrap: nowrap !important;
  }

  .course-hero-badges {
    width: 100% !important;
    min-width: 0 !important;
    display: flex !important;
    justify-content: flex-end !important;
    flex-wrap: nowrap !important;
    overflow: hidden !important;
  }

  .course-hero-badges .course-category-badge,
  .course-enrolled-pill {
    max-width: min(8.4rem, 54vw) !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .course-header-info {
    min-width: 0 !important;
  }

  .assignment-hero {
    padding-top: 3rem !important;
  }

  .assignment-hero-top {
    position: absolute !important;
    top: 0.62rem !important;
    right: 0.62rem !important;
    left: 2.98rem !important;
    min-height: 32px !important;
    padding: 0 !important;
    margin: 0 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: flex-end !important;
    gap: 0.3rem !important;
    flex-wrap: nowrap !important;
  }

  .assignment-hero-actions {
    min-width: 0 !important;
    justify-content: flex-end !important;
    gap: 0.3rem !important;
    flex-wrap: nowrap !important;
    overflow: hidden !important;
  }

  .assignment-status {
    max-width: 100% !important;
    min-height: 28px !important;
    padding: 0.32rem 0.58rem !important;
    border-radius: 999px !important;
    font-size: 0.7rem !important;
    line-height: 1 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .forum-header-top,
  .forum-thread-top {
    padding: 2.08rem 0 0 !important;
    min-height: 0 !important;
    margin: 0 !important;
  }
}

@media (max-width: 420px) {
  .course-header .back-btn,
  .assignment-back-btn,
  .forum-header-panel .forum-back-btn,
  .forum-thread-panel.is-hero .forum-back-btn {
    top: 0.58rem !important;
    left: 0.58rem !important;
    width: 30px !important;
    min-width: 30px !important;
    height: 30px !important;
    min-height: 30px !important;
    flex-basis: 30px !important;
  }

  .course-header .back-btn svg,
  .assignment-back-btn svg,
  .forum-header-panel .forum-back-btn svg,
  .forum-thread-panel.is-hero .forum-back-btn svg {
    width: 15px !important;
    height: 15px !important;
  }

  .course-hero {
    padding-top: 1.98rem !important;
  }

  .course-hero-top {
    top: 0.58rem !important;
    right: 0.58rem !important;
    left: 2.78rem !important;
    min-height: 30px !important;
  }

  .assignment-hero {
    padding-top: 2.78rem !important;
  }

  .assignment-hero-top {
    top: 0.58rem !important;
    right: 0.58rem !important;
    left: 2.78rem !important;
    min-height: 30px !important;
  }

  .forum-header-top,
  .forum-thread-top {
    padding-top: 1.98rem !important;
  }
}

/* Mobile density repair for course, roster, quiz report, forum, and modal surfaces. */
@media (max-width: 768px) {
  .course-header:not(.course-roster-hero) .course-hero {
    padding-top: 2.45rem !important;
  }

  .course-header:not(.course-roster-hero) .course-header-info h1 {
    margin-top: 0.12rem !important;
  }

  .course-roster-toolbar {
    display: grid !important;
    grid-template-columns: 34px minmax(0, max-content) !important;
    align-items: center !important;
    justify-content: start !important;
    gap: 0.48rem !important;
    margin-bottom: 0.1rem !important;
  }

  .course-roster-toolbar .management-back-link {
    position: static !important;
    width: 34px !important;
    min-width: 34px !important;
    height: 34px !important;
    min-height: 34px !important;
    padding: 0 !important;
    border-radius: 999px !important;
    background: rgba(26, 58, 92, 0.06) !important;
    border: 1px solid rgba(26, 58, 92, 0.08) !important;
    color: var(--navy) !important;
    font-size: 0 !important;
    line-height: 0 !important;
  }

  .course-roster-toolbar .management-back-link span {
    display: none !important;
  }

  .course-roster-toolbar .management-back-link svg {
    width: 17px !important;
    height: 17px !important;
    margin: 0 !important;
  }

  .course-roster-toolbar .management-inline-actions {
    min-width: 0 !important;
  }

  .course-roster-toolbar .bridge-secondary-btn {
    width: auto !important;
    min-width: 0 !important;
    min-height: 34px !important;
    padding: 0.42rem 0.72rem !important;
    border-radius: 999px !important;
    font-size: 0.74rem !important;
    line-height: 1 !important;
    white-space: nowrap !important;
  }

  .course-roster-hero .course-hero {
    padding-top: 0 !important;
    gap: 0.42rem !important;
  }

  .course-roster-hero .course-hero-top {
    position: static !important;
    inset: auto !important;
    min-height: 0 !important;
    padding: 0 !important;
    margin: 0 !important;
    display: block !important;
  }

  .course-roster-hero .management-heading {
    width: 100% !important;
    min-width: 0 !important;
    text-align: left !important;
  }

  .course-roster-hero .course-roster-title {
    margin: 0 !important;
    font-size: 1.08rem !important;
    line-height: 1.16 !important;
    text-align: left !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 2 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
  }

  .course-roster-hero .course-roster-copy {
    display: none !important;
  }

  .course-roster-hero .course-hero-badges {
    width: 100% !important;
    justify-content: flex-start !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    overflow-y: hidden !important;
    -webkit-overflow-scrolling: touch !important;
    scrollbar-width: none !important;
  }

  .course-roster-hero .course-hero-badges::-webkit-scrollbar {
    display: none !important;
  }

  .course-roster-hero .course-hero-badge {
    flex: 0 0 auto !important;
    max-width: 9.8rem !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .forum-header-panel,
  .forum-thread-panel.is-hero {
    min-height: 0 !important;
    padding: 0.72rem !important;
    border-radius: 16px !important;
    gap: 0.44rem !important;
  }

  .forum-header-panel .forum-back-btn,
  .forum-thread-panel.is-hero .forum-back-btn {
    top: 0.72rem !important;
    left: 0.72rem !important;
    background: rgba(26, 58, 92, 0.06) !important;
    color: var(--navy) !important;
  }

  .forum-header-top,
  .forum-thread-top {
    width: 100% !important;
    min-height: 0 !important;
    padding: 0 0 0 2.55rem !important;
    margin: 0 !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: stretch !important;
    justify-content: flex-start !important;
    gap: 0.38rem !important;
  }

  .forum-header-cluster,
  .forum-header-copy,
  .forum-thread-copy,
  .forum-thread-title-row {
    width: 100% !important;
    min-width: 0 !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: flex-start !important;
    justify-content: flex-start !important;
    text-align: left !important;
    gap: 0.28rem !important;
  }

  .forum-header-title,
  .forum-thread-title {
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 !important;
    text-align: left !important;
    font-size: 1.08rem !important;
    line-height: 1.18 !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 2 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
  }

  .forum-header-subtitle,
  .forum-thread-subtitle {
    display: none !important;
  }

  .forum-header-actions,
  .forum-thread-actions,
  .forum-count-row,
  .forum-thread-meta {
    width: 100% !important;
    min-width: 0 !important;
    margin: 0 !important;
    justify-content: flex-start !important;
    gap: 0.32rem !important;
    flex-wrap: wrap !important;
  }

  .forum-header-panel .forum-header-actions > button:nth-child(-n + 3) {
    display: none !important;
  }

  .forum-header-actions .btn-secondary,
  .forum-header-actions .btn-primary,
  .forum-header-actions .btn-danger,
  .forum-thread-actions .btn-secondary,
  .forum-thread-actions .btn-primary,
  .forum-thread-actions .btn-sm {
    width: auto !important;
    min-width: 0 !important;
    min-height: 30px !important;
    padding: 0.28rem 0.5rem !important;
    border-radius: 10px !important;
    font-size: 0.68rem !important;
    line-height: 1.1 !important;
    white-space: nowrap !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    text-align: center !important;
  }

  .forum-header-actions .btn-danger {
    color: #9b3f34 !important;
    background: rgba(155, 63, 52, 0.08) !important;
    border: 1px solid rgba(155, 63, 52, 0.16) !important;
  }

  .forum-header-actions .btn-danger svg,
  .forum-header-actions .btn-secondary svg,
  .forum-header-actions .btn-primary svg {
    width: 14px !important;
    height: 14px !important;
    flex: 0 0 14px !important;
  }

  .forum-header-panel .forum-type-badge {
    display: none !important;
  }

  .forum-header-panel .forum-count-row .forum-chip:nth-child(n + 3) {
    display: none !important;
  }

  .forum-thread-count-pill,
  .forum-chip {
    min-height: 25px !important;
    padding: 0.22rem 0.46rem !important;
    font-size: 0.66rem !important;
    line-height: 1.1 !important;
  }

  .forum-inline-composer {
    grid-template-columns: 34px minmax(0, 1fr) !important;
    padding: 0.68rem !important;
    gap: 0.48rem !important;
  }

  .forum-inline-composer-input {
    min-height: 72px !important;
    padding: 0.62rem !important;
    font-size: 0.84rem !important;
  }

  .quiz-card:not(.is-teacher-card) > .activity-card-footer {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    gap: 0.42rem !important;
    overflow: hidden !important;
  }

  .quiz-card > .activity-card-footer .quiz-status,
  .quiz-card > .activity-card-footer .activity-inline-action,
  .quiz-card > .activity-card-footer .activity-card-open-btn {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    box-sizing: border-box !important;
  }

  .quiz-card > .activity-card-footer .activity-inline-action,
  .quiz-card > .activity-card-footer .activity-card-open-btn {
    min-height: 36px !important;
    padding: 0.44rem 0.42rem !important;
    border-radius: 12px !important;
    font-size: 0.72rem !important;
    line-height: 1.12 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .quiz-report-shell .management-back-link {
    top: 0.72rem !important;
    left: 0 !important;
  }

  .quiz-report-shell .management-detail-header {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) !important;
    gap: 0.52rem !important;
    min-height: 0 !important;
    padding-left: 2.65rem !important;
  }

  .quiz-report-shell .management-detail-copy h2 {
    font-size: 1.45rem !important;
    line-height: 1.12 !important;
  }

  .quiz-report-shell .management-detail-copy p {
    font-size: 0.84rem !important;
    line-height: 1.36 !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 2 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
  }

  .quiz-report-shell .management-detail-actions {
    width: 100% !important;
    max-width: 100% !important;
    display: grid !important;
    grid-template-columns: repeat(4, minmax(0, 1fr)) !important;
    gap: 0.32rem !important;
    overflow: visible !important;
    padding-bottom: 0 !important;
  }

  .quiz-report-shell .management-detail-actions button {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100% !important;
    min-width: 0 !important;
    min-height: 34px !important;
    padding: 0.42rem 0.3rem !important;
    border-radius: 12px !important;
    font-size: 0.72rem !important;
    line-height: 1 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    text-align: center !important;
  }

  .quiz-report-shell .management-detail-actions .btn-danger {
    background: rgba(155, 63, 52, 0.08) !important;
    border: 1px solid rgba(155, 63, 52, 0.12) !important;
    color: #9b3f34 !important;
  }

  .quiz-report-hero {
    grid-template-columns: 1fr !important;
    padding: 0.82rem !important;
    gap: 0.64rem !important;
    border-radius: 16px !important;
  }

  .quiz-report-scoreboard {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.48rem !important;
  }

  .quiz-report-scorecard {
    min-height: 72px !important;
    padding: 0.58rem !important;
    border-radius: 13px !important;
  }

  .quiz-report-scorecard-value {
    font-size: 1.28rem !important;
  }

  .quiz-report-download-menu {
    position: fixed !important;
    z-index: 10010 !important;
    display: grid !important;
    grid-template-columns: repeat(2, minmax(72px, 1fr)) !important;
    gap: 0.35rem !important;
    padding: 0.42rem !important;
    border: 1px solid rgba(26, 58, 92, 0.12) !important;
    border-radius: 14px !important;
    background: rgba(255, 255, 255, 0.98) !important;
    box-shadow: 0 16px 36px rgba(26, 58, 92, 0.18) !important;
  }

  .quiz-report-download-menu button {
    min-height: 34px !important;
    padding: 0.42rem 0.72rem !important;
    border: 0 !important;
    border-radius: 10px !important;
    background: rgba(26, 58, 92, 0.07) !important;
    color: var(--navy) !important;
    font-size: 0.76rem !important;
    font-weight: 800 !important;
    line-height: 1 !important;
    text-align: center !important;
  }

  .bridge-attendance-card .activity-empty-state {
    min-height: 0 !important;
    padding: 0.95rem 0.7rem !important;
  }

  .bridge-attendance-card .activity-empty-state svg {
    width: 30px !important;
    height: 30px !important;
    opacity: 0.45 !important;
  }

  .settings-avatar-btn {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: auto !important;
    max-width: 100% !important;
    min-width: max-content !important;
    min-height: 32px !important;
    padding: 0.36rem 0.68rem !important;
    border-radius: 999px !important;
    font-size: 0.72rem !important;
    line-height: 1 !important;
    white-space: nowrap !important;
    word-break: keep-all !important;
    overflow: visible !important;
    text-overflow: clip !important;
  }

  #courseSettingsModal {
    align-items: flex-end !important;
    padding: 0 !important;
  }

  #courseSettingsModal .modal-content {
    width: 100vw !important;
    max-width: none !important;
    max-height: 92vh !important;
    border-radius: 22px 22px 0 0 !important;
    overflow: hidden !important;
  }

  #courseSettingsModal .modal-header {
    min-height: 0 !important;
    padding: 0.86rem 1rem 0.72rem !important;
    align-items: center !important;
  }

  #courseSettingsModal .modal-header h3,
  #courseSettingsModal .modal-title {
    font-size: 1.05rem !important;
    line-height: 1.2 !important;
  }

  #courseSettingsModal .modal-close {
    width: 34px !important;
    min-width: 34px !important;
    height: 34px !important;
    min-height: 34px !important;
    border-radius: 999px !important;
    font-size: 1.25rem !important;
  }

  #courseSettingsModal .modal-body {
    max-height: calc(92vh - 64px) !important;
    padding: 0.78rem 0.86rem 0 !important;
    overflow-y: auto !important;
  }

  #courseSettingsModal form {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 0.58rem !important;
  }

  #courseSettingsModal .form-row {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.52rem !important;
  }

  #courseSettingsModal .form-group {
    margin: 0 !important;
    gap: 0.3rem !important;
  }

  #courseSettingsModal label {
    font-size: 0.78rem !important;
    line-height: 1.15 !important;
  }

  #courseSettingsModal input,
  #courseSettingsModal select,
  #courseSettingsModal textarea {
    min-height: 42px !important;
    padding: 0.62rem 0.72rem !important;
    border-radius: 12px !important;
    font-size: 0.9rem !important;
    line-height: 1.3 !important;
  }

  #courseSettingsModal textarea {
    min-height: 84px !important;
    max-height: 118px !important;
  }

  #courseSettingsModal .form-actions {
    position: sticky !important;
    bottom: 0 !important;
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.52rem !important;
    margin: 0.14rem -0.86rem 0 !important;
    padding: 0.62rem 0.86rem calc(0.62rem + env(safe-area-inset-bottom)) !important;
    background: rgba(255, 251, 245, 0.96) !important;
    border-top: 1px solid rgba(26, 58, 92, 0.08) !important;
    box-shadow: 0 -12px 22px rgba(15, 23, 42, 0.06) !important;
  }

  #courseSettingsModal .form-actions > button {
    width: 100% !important;
    min-width: 0 !important;
    min-height: 42px !important;
    padding: 0.52rem 0.56rem !important;
    border-radius: 12px !important;
    font-size: 0.8rem !important;
    line-height: 1 !important;
    white-space: nowrap !important;
  }

  #quizAttemptInsightModal .modal-content {
    width: min(100vw - 1rem, 720px) !important;
    max-height: 90vh !important;
    border-radius: 18px !important;
  }

  #quizAttemptInsightModal .modal-body {
    padding: 0.78rem !important;
  }

  #quizAttemptInsightModal .quiz-create-card {
    padding: 0.72rem !important;
    border-radius: 14px !important;
  }

  #quizAttemptInsightModal .quiz-create-card-head {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) !important;
    gap: 0.56rem !important;
    align-items: start !important;
  }

  #quizAttemptInsightModal .quiz-create-card-title {
    width: 100% !important;
    max-width: 100% !important;
    font-size: 1.08rem !important;
    line-height: 1.2 !important;
    white-space: normal !important;
    word-break: keep-all !important;
    overflow-wrap: break-word !important;
  }

  #quizAttemptInsightModal .quiz-create-card-note {
    font-size: 0.8rem !important;
    line-height: 1.35 !important;
  }

  #quizAttemptInsightModal .quiz-export-actions {
    width: 100% !important;
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.46rem !important;
  }

  #quizAttemptInsightModal .quiz-export-actions .btn-sm {
    width: 100% !important;
    min-width: 0 !important;
    min-height: 36px !important;
    padding: 0.44rem 0.46rem !important;
    border-radius: 11px !important;
    font-size: 0.74rem !important;
    line-height: 1 !important;
    white-space: nowrap !important;
  }
}

@media (max-width: 420px) {
  .course-header:not(.course-roster-hero) .course-hero {
    padding-top: 2.32rem !important;
  }

  .course-roster-toolbar {
    grid-template-columns: 32px minmax(0, max-content) !important;
  }

  .course-roster-toolbar .management-back-link {
    width: 32px !important;
    min-width: 32px !important;
    height: 32px !important;
    min-height: 32px !important;
  }

  .forum-header-panel,
  .forum-thread-panel.is-hero {
    padding: 0.64rem !important;
  }

  .forum-header-panel .forum-back-btn,
  .forum-thread-panel.is-hero .forum-back-btn {
    top: 0.64rem !important;
    left: 0.64rem !important;
  }

  .forum-header-top,
  .forum-thread-top {
    padding-left: 2.35rem !important;
  }

  #courseSettingsModal .form-row {
    grid-template-columns: 1fr !important;
  }

  #quizAttemptInsightModal .modal-content {
    width: 100vw !important;
    max-height: 92vh !important;
    border-radius: 22px 22px 0 0 !important;
  }
}

/* Final mobile guard: keep hero card copy clear of the floating back button. */
@media (max-width: 768px) {
  .course-header:not(.course-roster-hero) {
    --mobile-hero-back-size: 32px;
    --mobile-hero-back-offset: 0.62rem;
    --mobile-hero-back-clearance: 0.74rem;
  }

  .course-header:not(.course-roster-hero) .course-hero {
    padding-top: calc(var(--mobile-hero-back-size) + var(--mobile-hero-back-offset) + var(--mobile-hero-back-clearance)) !important;
  }

  .course-header:not(.course-roster-hero) .course-hero-top {
    left: calc(var(--mobile-hero-back-offset) + var(--mobile-hero-back-size) + 0.52rem) !important;
    right: var(--mobile-hero-back-offset) !important;
    min-height: var(--mobile-hero-back-size) !important;
  }

  .course-header:not(.course-roster-hero) .course-header-content,
  .course-header:not(.course-roster-hero) .course-header-info {
    min-width: 0 !important;
  }

  .course-header:not(.course-roster-hero) .course-header-info h1 {
    margin-top: 0 !important;
    clear: both !important;
  }
}

@media (max-width: 420px) {
  .course-header:not(.course-roster-hero) {
    --mobile-hero-back-size: 30px;
    --mobile-hero-back-offset: 0.58rem;
    --mobile-hero-back-clearance: 0.68rem;
  }
}

/* Stronger mobile clearance for card headers with floating back buttons. */
@media (max-width: 768px) {
  .course-header:not(.course-roster-hero) {
    --mobile-hero-back-clearance: 1.05rem;
  }

  .assignment-hero {
    padding-top: 3.35rem !important;
  }

  .assignment-hero-top {
    left: 3.12rem !important;
    right: 0.62rem !important;
  }

  .forum-header-panel,
  .forum-thread-panel.is-hero {
    padding-top: 3.15rem !important;
  }

  .forum-header-top,
  .forum-thread-top {
    padding: 0 !important;
  }

  .forum-header-cluster,
  .forum-header-copy,
  .forum-thread-copy,
  .forum-thread-title-row {
    align-items: flex-start !important;
    text-align: left !important;
  }

  .course-page-header {
    position: relative !important;
    padding: 3.15rem 0.82rem 0.82rem !important;
  }

  .course-page-header .back-btn {
    position: absolute !important;
    top: 0.72rem !important;
    left: 0.72rem !important;
    margin: 0 !important;
  }

  .course-page-header h1 {
    margin-top: 0 !important;
  }
}

@media (max-width: 420px) {
  .course-header:not(.course-roster-hero) {
    --mobile-hero-back-clearance: 0.95rem;
  }

  .assignment-hero {
    padding-top: 3.08rem !important;
  }

  .assignment-hero-top {
    left: 2.92rem !important;
    right: 0.58rem !important;
  }

  .forum-header-panel,
  .forum-thread-panel.is-hero,
  .course-page-header {
    padding-top: 2.95rem !important;
  }
}

/* Mobile modal workspace pass: make creation/editing dialogs compact and one-hand friendly. */
@media (max-width: 768px) {
  #assignmentBuilderModal,
  #quizBuilderModal,
  #quizQuestionEditorModal,
  #quizQuestionBankModal,
  #quizBulkImportModal,
  #forumBuilderModal,
  #courseSettingsModal,
  #editSectionModal,
  #editActivityModal,
  #editGradeCatModal,
  #editQuestionModal,
  #importQuestionsModal,
  #categoryManageModal,
  #editRoleModal,
  #createCourseModal,
  #createAnnouncementModal,
  #createH5pModal,
  #createScormModal,
  #registerLtiToolModal,
  #quizManualGradeModal,
  #view-submission-modal {
    align-items: flex-end !important;
    justify-content: center !important;
    padding: calc(0.45rem + env(safe-area-inset-top, 0px)) 0 0 !important;
    background: rgba(15, 23, 42, 0.34) !important;
    backdrop-filter: blur(5px) !important;
    overflow: hidden !important;
  }

  #assignmentBuilderModal > .modal-content,
  #quizBuilderModal > .modal-content,
  #quizQuestionEditorModal > .modal-content,
  #quizQuestionBankModal > .modal-content,
  #quizBulkImportModal > .modal-content,
  #forumBuilderModal > .modal-content,
  #courseSettingsModal > .modal-content,
  #editSectionModal > .modal-content,
  #editActivityModal > .modal-content,
  #editGradeCatModal > .modal-content,
  #editQuestionModal > .modal-content,
  #importQuestionsModal > .modal-content,
  #categoryManageModal > .modal-content,
  #editRoleModal > .modal-content,
  #createCourseModal > .modal-content,
  #createAnnouncementModal > .modal-content,
  #createH5pModal > .modal-content,
  #createScormModal > .modal-content,
  #registerLtiToolModal > .modal-content,
  #quizManualGradeModal > .modal-content,
  #view-submission-modal > .modal-content {
    width: 100vw !important;
    max-width: 100vw !important;
    max-height: calc(94dvh - env(safe-area-inset-top, 0px)) !important;
    height: auto !important;
    margin: 0 !important;
    border-radius: 20px 20px 0 0 !important;
    border-right: 0 !important;
    border-bottom: 0 !important;
    border-left: 0 !important;
    display: flex !important;
    flex-direction: column !important;
    overflow: hidden !important;
    box-shadow: 0 -18px 42px rgba(15, 23, 42, 0.18) !important;
  }

  #assignmentBuilderModal .modal-header,
  #quizBuilderModal .modal-header,
  #quizQuestionEditorModal .modal-header,
  #quizQuestionBankModal .modal-header,
  #quizBulkImportModal .modal-header,
  #forumBuilderModal .modal-header,
  #courseSettingsModal .modal-header,
  #editSectionModal .modal-header,
  #editActivityModal .modal-header,
  #editGradeCatModal .modal-header,
  #editQuestionModal .modal-header,
  #importQuestionsModal .modal-header,
  #categoryManageModal .modal-header,
  #editRoleModal .modal-header,
  #createCourseModal .modal-header,
  #createAnnouncementModal .modal-header,
  #createH5pModal .modal-header,
  #createScormModal .modal-header,
  #registerLtiToolModal .modal-header,
  #quizManualGradeModal .modal-header,
  #view-submission-modal .modal-header {
    min-height: 52px !important;
    padding: 0.62rem 0.78rem !important;
    align-items: center !important;
    gap: 0.62rem !important;
  }

  #assignmentBuilderModal .modal-heading,
  #quizBuilderModal .modal-heading,
  #quizQuestionEditorModal .modal-heading,
  #quizQuestionBankModal .modal-heading,
  #quizBulkImportModal .modal-heading,
  #forumBuilderModal .modal-heading,
  #courseSettingsModal .modal-heading,
  #editSectionModal .modal-heading,
  #editActivityModal .modal-heading,
  #editGradeCatModal .modal-heading,
  #editQuestionModal .modal-heading,
  #importQuestionsModal .modal-heading,
  #categoryManageModal .modal-heading,
  #editRoleModal .modal-heading,
  #createCourseModal .modal-heading,
  #createAnnouncementModal .modal-heading,
  #createH5pModal .modal-heading,
  #createScormModal .modal-heading,
  #registerLtiToolModal .modal-heading,
  #quizManualGradeModal .modal-heading,
  #view-submission-modal .modal-heading {
    gap: 0.12rem !important;
    min-width: 0 !important;
  }

  #assignmentBuilderModal .modal-title,
  #quizBuilderModal .modal-title,
  #quizQuestionEditorModal .modal-title,
  #quizQuestionBankModal .modal-title,
  #quizBulkImportModal .modal-title,
  #forumBuilderModal .modal-title,
  #courseSettingsModal .modal-title,
  #editSectionModal .modal-title,
  #editActivityModal .modal-title,
  #editGradeCatModal .modal-title,
  #editQuestionModal .modal-title,
  #importQuestionsModal .modal-title,
  #categoryManageModal .modal-title,
  #editRoleModal .modal-title,
  #createCourseModal .modal-title,
  #createAnnouncementModal .modal-title,
  #createH5pModal .modal-title,
  #createScormModal .modal-title,
  #registerLtiToolModal .modal-title,
  #quizManualGradeModal .modal-title,
  #view-submission-modal .modal-title {
    font-size: 1rem !important;
    line-height: 1.2 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  #assignmentBuilderModal .modal-close,
  #quizBuilderModal .modal-close,
  #quizQuestionEditorModal .modal-close,
  #quizQuestionBankModal .modal-close,
  #quizBulkImportModal .modal-close,
  #forumBuilderModal .modal-close,
  #courseSettingsModal .modal-close,
  #editSectionModal .modal-close,
  #editActivityModal .modal-close,
  #editGradeCatModal .modal-close,
  #editQuestionModal .modal-close,
  #importQuestionsModal .modal-close,
  #categoryManageModal .modal-close,
  #editRoleModal .modal-close,
  #createCourseModal .modal-close,
  #createAnnouncementModal .modal-close,
  #createH5pModal .modal-close,
  #createScormModal .modal-close,
  #registerLtiToolModal .modal-close,
  #quizManualGradeModal .modal-close,
  #view-submission-modal .modal-close {
    width: 36px !important;
    min-width: 36px !important;
    height: 36px !important;
    min-height: 36px !important;
    font-size: 1.15rem !important;
  }

  #assignmentBuilderModal .modal-body,
  #quizBuilderModal .modal-body,
  #quizQuestionEditorModal .modal-body,
  #quizQuestionBankModal .modal-body,
  #quizBulkImportModal .modal-body,
  #forumBuilderModal .modal-body,
  #courseSettingsModal .modal-body,
  #editSectionModal .modal-body,
  #editActivityModal .modal-body,
  #editGradeCatModal .modal-body,
  #editQuestionModal .modal-body,
  #importQuestionsModal .modal-body,
  #categoryManageModal .modal-body,
  #editRoleModal .modal-body,
  #createCourseModal .modal-body,
  #createAnnouncementModal .modal-body,
  #createH5pModal .modal-body,
  #createScormModal .modal-body,
  #registerLtiToolModal .modal-body,
  #quizManualGradeModal .modal-body,
  #view-submission-modal .modal-body {
    flex: 1 1 auto !important;
    min-height: 0 !important;
    max-height: none !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    padding: 0.62rem 0.72rem 0 !important;
  }

  #assignmentBuilderModal .quiz-create-shell,
  #quizBuilderModal .quiz-create-shell,
  #quizQuestionEditorModal .quiz-create-shell,
  #quizQuestionBankModal .quiz-create-shell,
  #quizBulkImportModal .quiz-create-shell,
  #forumBuilderModal .quiz-create-shell {
    gap: 0.58rem !important;
  }

  #assignmentBuilderModal .quiz-create-card,
  #quizBuilderModal .quiz-create-card,
  #quizQuestionEditorModal .quiz-create-card,
  #quizQuestionBankModal .quiz-create-card,
  #quizBulkImportModal .quiz-create-card,
  #forumBuilderModal .quiz-create-card,
  #courseSettingsModal .form-group,
  #editSectionModal .form-group,
  #editActivityModal .form-group,
  #editGradeCatModal .form-group,
  #editQuestionModal .form-group,
  #importQuestionsModal .form-group,
  #categoryManageModal .form-group,
  #editRoleModal .form-group,
  #createCourseModal .form-group,
  #createAnnouncementModal .form-group,
  #createH5pModal .form-group,
  #createScormModal .form-group,
  #registerLtiToolModal .form-group {
    padding: 0.66rem !important;
    border-radius: 14px !important;
    box-shadow: none !important;
  }

  #assignmentBuilderModal .quiz-create-card-head,
  #quizBuilderModal .quiz-create-card-head,
  #quizQuestionEditorModal .quiz-create-card-head,
  #quizQuestionBankModal .quiz-create-card-head,
  #quizBulkImportModal .quiz-create-card-head,
  #forumBuilderModal .quiz-create-card-head {
    margin-bottom: 0.48rem !important;
    gap: 0.42rem !important;
  }

  #assignmentBuilderModal .quiz-create-card-title,
  #quizBuilderModal .quiz-create-card-title,
  #quizQuestionEditorModal .quiz-create-card-title,
  #quizQuestionBankModal .quiz-create-card-title,
  #quizBulkImportModal .quiz-create-card-title,
  #forumBuilderModal .quiz-create-card-title {
    font-size: 0.92rem !important;
    line-height: 1.22 !important;
  }

  #assignmentBuilderModal .activity-builder-grid,
  #quizBuilderModal .activity-builder-grid,
  #quizQuestionEditorModal .activity-builder-grid,
  #quizQuestionBankModal .activity-builder-grid,
  #quizBulkImportModal .activity-builder-grid,
  #forumBuilderModal .activity-builder-grid,
  #assignmentBuilderModal .form-row,
  #quizBuilderModal .form-row,
  #quizQuestionEditorModal .form-row,
  #forumBuilderModal .form-row {
    grid-template-columns: 1fr !important;
    gap: 0.48rem !important;
  }

  #assignmentBuilderModal .form-group,
  #quizBuilderModal .form-group,
  #quizQuestionEditorModal .form-group,
  #quizQuestionBankModal .form-group,
  #quizBulkImportModal .form-group,
  #forumBuilderModal .form-group {
    margin: 0 !important;
    gap: 0.28rem !important;
  }

  #assignmentBuilderModal label,
  #quizBuilderModal label,
  #quizQuestionEditorModal label,
  #quizQuestionBankModal label,
  #quizBulkImportModal label,
  #forumBuilderModal label,
  #courseSettingsModal label,
  #editSectionModal label,
  #editActivityModal label,
  #editGradeCatModal label,
  #editQuestionModal label,
  #importQuestionsModal label,
  #categoryManageModal label,
  #editRoleModal label,
  #createCourseModal label,
  #createAnnouncementModal label,
  #createH5pModal label,
  #createScormModal label,
  #registerLtiToolModal label {
    font-size: 0.76rem !important;
    line-height: 1.12 !important;
  }

  #assignmentBuilderModal input,
  #assignmentBuilderModal select,
  #assignmentBuilderModal textarea,
  #quizBuilderModal input,
  #quizBuilderModal select,
  #quizBuilderModal textarea,
  #quizQuestionEditorModal input,
  #quizQuestionEditorModal select,
  #quizQuestionEditorModal textarea,
  #quizQuestionBankModal input,
  #quizQuestionBankModal select,
  #quizQuestionBankModal textarea,
  #quizBulkImportModal input,
  #quizBulkImportModal select,
  #quizBulkImportModal textarea,
  #forumBuilderModal input,
  #forumBuilderModal select,
  #forumBuilderModal textarea,
  #courseSettingsModal input,
  #courseSettingsModal select,
  #courseSettingsModal textarea,
  #editSectionModal input,
  #editSectionModal select,
  #editSectionModal textarea,
  #editActivityModal input,
  #editActivityModal select,
  #editActivityModal textarea,
  #editGradeCatModal input,
  #editGradeCatModal select,
  #editGradeCatModal textarea,
  #editQuestionModal input,
  #editQuestionModal select,
  #editQuestionModal textarea,
  #importQuestionsModal input,
  #importQuestionsModal select,
  #importQuestionsModal textarea,
  #categoryManageModal input,
  #categoryManageModal select,
  #categoryManageModal textarea,
  #editRoleModal input,
  #editRoleModal select,
  #editRoleModal textarea,
  #createCourseModal input,
  #createCourseModal select,
  #createCourseModal textarea,
  #createAnnouncementModal input,
  #createAnnouncementModal select,
  #createAnnouncementModal textarea,
  #createH5pModal input,
  #createH5pModal select,
  #createH5pModal textarea,
  #createScormModal input,
  #createScormModal select,
  #createScormModal textarea,
  #registerLtiToolModal input,
  #registerLtiToolModal select,
  #registerLtiToolModal textarea {
    min-height: 40px !important;
    padding: 0.56rem 0.66rem !important;
    border-radius: 12px !important;
    font-size: 16px !important;
    line-height: 1.3 !important;
  }

  #assignmentBuilderModal textarea,
  #quizBuilderModal textarea,
  #quizQuestionEditorModal textarea,
  #quizQuestionBankModal textarea,
  #quizBulkImportModal textarea,
  #forumBuilderModal textarea,
  #courseSettingsModal textarea,
  #editActivityModal textarea,
  #editQuestionModal textarea,
  #importQuestionsModal textarea,
  #createCourseModal textarea,
  #createAnnouncementModal textarea {
    min-height: 78px !important;
    max-height: 132px !important;
  }

  #assignmentBuilderModal .form-actions,
  #quizBuilderModal .form-actions,
  #quizQuestionEditorModal .form-actions,
  #quizQuestionBankModal .form-actions,
  #quizBulkImportModal .form-actions,
  #forumBuilderModal .form-actions,
  #courseSettingsModal .form-actions,
  #editSectionModal .form-actions,
  #editActivityModal .form-actions,
  #editGradeCatModal .form-actions,
  #editQuestionModal .form-actions,
  #importQuestionsModal .form-actions,
  #categoryManageModal .form-actions,
  #editRoleModal .form-actions,
  #createCourseModal .modal-footer,
  #createAnnouncementModal .modal-footer,
  #createH5pModal .modal-footer,
  #createScormModal .modal-footer,
  #registerLtiToolModal .modal-footer,
  #quizManualGradeModal .form-actions,
  #view-submission-modal .modal-footer {
    position: sticky !important;
    bottom: 0 !important;
    z-index: 8 !important;
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.48rem !important;
    margin: 0.56rem -0.72rem 0 !important;
    padding: 0.58rem 0.72rem calc(0.58rem + env(safe-area-inset-bottom, 0px)) !important;
    border-top: 1px solid rgba(15, 23, 42, 0.08) !important;
    background: rgba(255, 255, 255, 0.96) !important;
    box-shadow: 0 -10px 22px rgba(15, 23, 42, 0.06) !important;
  }

  #assignmentBuilderModal .form-actions > *,
  #quizBuilderModal .form-actions > *,
  #quizQuestionEditorModal .form-actions > *,
  #quizQuestionBankModal .form-actions > *,
  #quizBulkImportModal .form-actions > *,
  #forumBuilderModal .form-actions > *,
  #courseSettingsModal .form-actions > *,
  #editSectionModal .form-actions > *,
  #editActivityModal .form-actions > *,
  #editGradeCatModal .form-actions > *,
  #editQuestionModal .form-actions > *,
  #importQuestionsModal .form-actions > *,
  #categoryManageModal .form-actions > *,
  #editRoleModal .form-actions > *,
  #createCourseModal .modal-footer > *,
  #createAnnouncementModal .modal-footer > *,
  #createH5pModal .modal-footer > *,
  #createScormModal .modal-footer > *,
  #registerLtiToolModal .modal-footer > *,
  #quizManualGradeModal .form-actions > *,
  #view-submission-modal .modal-footer > * {
    width: 100% !important;
    min-width: 0 !important;
    min-height: 40px !important;
    padding: 0.54rem 0.52rem !important;
    border-radius: 12px !important;
    font-size: 0.8rem !important;
    line-height: 1 !important;
    justify-content: center !important;
    white-space: nowrap !important;
  }

  #quizBuilderModal .builder-toolbar,
  #quizBulkImportModal .builder-toolbar,
  #quizQuestionBankModal .builder-toolbar {
    display: grid !important;
    grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
    gap: 0.42rem !important;
  }

  #quizBuilderModal .builder-toolbar > *,
  #quizBulkImportModal .builder-toolbar > *,
  #quizQuestionBankModal .builder-toolbar > * {
    width: 100% !important;
    min-width: 0 !important;
    min-height: 38px !important;
    padding: 0.46rem 0.38rem !important;
    border-radius: 11px !important;
    font-size: 0.72rem !important;
    line-height: 1.05 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  #quizBuilderModal .builder-question-list,
  #quizQuestionBankModal .question-bank-picker-list,
  #quizBulkImportModal .bulk-import-preview-list,
  #categoryManageModal .qb-list {
    max-height: 42dvh !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
  }

  #quizQuestionEditorModal .builder-option-row,
  #editQuestionModal .builder-option-row,
  #quizQuestionEditorModal .matching-pair-row,
  #editQuestionModal .matching-pair-row {
    grid-template-columns: minmax(0, 1fr) auto !important;
    gap: 0.42rem !important;
  }

  #quizQuestionEditorModal .builder-option-row .btn-remove,
  #editQuestionModal .builder-option-row .btn-remove {
    width: 34px !important;
    min-width: 34px !important;
    height: 34px !important;
    min-height: 34px !important;
    padding: 0 !important;
  }
}

@media (max-width: 420px) {
  #assignmentBuilderModal > .modal-content,
  #quizBuilderModal > .modal-content,
  #quizQuestionEditorModal > .modal-content,
  #quizQuestionBankModal > .modal-content,
  #quizBulkImportModal > .modal-content,
  #forumBuilderModal > .modal-content,
  #courseSettingsModal > .modal-content,
  #editActivityModal > .modal-content,
  #createCourseModal > .modal-content,
  #createAnnouncementModal > .modal-content {
    max-height: calc(96dvh - env(safe-area-inset-top, 0px)) !important;
    border-radius: 18px 18px 0 0 !important;
  }

  #quizBuilderModal .builder-toolbar,
  #quizBulkImportModal .builder-toolbar,
  #quizQuestionBankModal .builder-toolbar {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  }
}

/* Mobile legacy/custom modal sweep: old hand-built dialogs should behave like compact bottom sheets. */
@media (max-width: 768px) {
  body .modal-overlay.active,
  body .modal-overlay[style*="flex"],
  body .bridge-modal-overlay.open,
  body .quiz-modal-overlay {
    align-items: flex-end !important;
    justify-content: center !important;
    padding: calc(0.42rem + env(safe-area-inset-top, 0px)) 0 0 !important;
    background: rgba(15, 23, 42, 0.36) !important;
    backdrop-filter: blur(5px) !important;
    overflow: hidden !important;
    overscroll-behavior: contain !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal,
  body .modal-overlay.active > .modal.active.platform-dialog-modal,
  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active,
  body #modalOverlay.modal-overlay.active > #courseModal.course-modal.active,
  body .bridge-modal-overlay.open > .bridge-modal-panel,
  body .bridge-modal-overlay.open > .bridge-modal-panel.wide,
  body #quizModal.quiz-modal-overlay > .quiz-modal-shell {
    width: 100vw !important;
    max-width: 100vw !important;
    height: auto !important;
    max-height: calc(94dvh - env(safe-area-inset-top, 0px)) !important;
    margin: 0 !important;
    border-right: 0 !important;
    border-bottom: 0 !important;
    border-left: 0 !important;
    border-radius: 18px 18px 0 0 !important;
    display: flex !important;
    flex-direction: column !important;
    overflow: hidden !important;
    transform: none !important;
    box-shadow: 0 -18px 42px rgba(15, 23, 42, 0.2) !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal > form,
  body .modal-overlay.active > .modal.active.platform-dialog-modal > form,
  body #quizModal.quiz-modal-overlay > .quiz-modal-shell {
    min-height: 0 !important;
    display: flex !important;
    flex: 1 1 auto !important;
    flex-direction: column !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal .modal-header,
  body .modal-overlay.active > .modal.active.platform-dialog-modal .modal-header,
  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active .modal-header,
  body #modalOverlay.modal-overlay.active > #courseModal.course-modal.active .modal-header,
  body .bridge-modal-overlay.open .bridge-modal-header,
  body #quizModal.quiz-modal-overlay .quiz-modal-header {
    position: sticky !important;
    top: 0 !important;
    z-index: 6 !important;
    min-height: 52px !important;
    padding: calc(0.58rem + env(safe-area-inset-top, 0px)) 0.72rem 0.58rem !important;
    display: flex !important;
    align-items: center !important;
    gap: 0.58rem !important;
    background: rgba(255, 255, 255, 0.97) !important;
    border-bottom: 1px solid rgba(15, 23, 42, 0.08) !important;
    backdrop-filter: blur(14px) !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal .modal-header h2,
  body .modal-overlay.active > .modal.active.platform-dialog-modal .modal-header h2,
  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active .modal-header h2,
  body #modalOverlay.modal-overlay.active > #courseModal.course-modal.active .modal-header h2,
  body .bridge-modal-overlay.open .bridge-modal-title,
  body #quizModal.quiz-modal-overlay .quiz-modal-title {
    min-width: 0 !important;
    margin: 0 !important;
    font-size: 1rem !important;
    line-height: 1.22 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  body .bridge-modal-overlay.open .bridge-modal-kicker,
  body .bridge-modal-overlay.open .bridge-modal-helper,
  body .bridge-modal-overlay.open .bridge-modal-desc,
  body #quizModal.quiz-modal-overlay .quiz-modal-subtitle,
  body .modal-overlay.active > .modal.active.discussion-modal .discussion-modal-intro-copy,
  body .modal-overlay.active > .modal.active.discussion-modal .discussion-modal-note,
  body .modal-overlay.active > .modal.active.platform-dialog-modal .modal-kicker {
    display: none !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal .modal-close,
  body .modal-overlay.active > .modal.active.platform-dialog-modal .modal-close,
  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active .modal-close,
  body #modalOverlay.modal-overlay.active > #courseModal.course-modal.active .modal-close,
  body .bridge-modal-overlay.open .bridge-modal-close {
    width: 38px !important;
    min-width: 38px !important;
    height: 38px !important;
    min-height: 38px !important;
    padding: 0 !important;
    border-radius: 999px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    background: rgba(15, 23, 42, 0.055) !important;
    border: 1px solid rgba(15, 23, 42, 0.08) !important;
    color: var(--gray-600) !important;
    flex: 0 0 auto !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal .modal-body,
  body .modal-overlay.active > .modal.active.platform-dialog-modal .modal-body,
  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active .modal-body,
  body #modalOverlay.modal-overlay.active > #courseModal.course-modal.active .course-modal-body,
  body .bridge-modal-overlay.open .bridge-modal-body,
  body #quizModal.quiz-modal-overlay .quiz-modal-content {
    flex: 1 1 auto !important;
    min-height: 0 !important;
    max-height: none !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    padding: 0.72rem 0.72rem calc(0.86rem + env(safe-area-inset-bottom, 0px)) !important;
    gap: 0.68rem !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal .modal-body,
  body .modal-overlay.active > .modal.active.platform-dialog-modal .modal-body,
  body .bridge-modal-overlay.open .bridge-modal-body,
  body #quizModal.quiz-modal-overlay .quiz-modal-content {
    display: flex !important;
    flex-direction: column !important;
  }

  body #modalOverlay.modal-overlay.active > #courseModal.course-modal.active .course-modal-body {
    display: block !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal .modal-footer,
  body .modal-overlay.active > .modal.active.platform-dialog-modal .modal-footer,
  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active .modal-footer,
  body .bridge-modal-overlay.open .bridge-modal-footer,
  body #quizModal.quiz-modal-overlay .quiz-modal-footer {
    position: sticky !important;
    bottom: 0 !important;
    z-index: 7 !important;
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.48rem !important;
    margin: 0 !important;
    padding: 0.58rem 0.72rem calc(0.58rem + env(safe-area-inset-bottom, 0px)) !important;
    border-top: 1px solid rgba(15, 23, 42, 0.08) !important;
    background: rgba(255, 255, 255, 0.97) !important;
    box-shadow: 0 -10px 22px rgba(15, 23, 42, 0.08) !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal .modal-footer > button,
  body .modal-overlay.active > .modal.active.platform-dialog-modal .modal-footer > button,
  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active .modal-footer > button,
  body .bridge-modal-overlay.open .bridge-modal-footer > button,
  body #quizModal.quiz-modal-overlay .quiz-modal-actions > button {
    width: 100% !important;
    min-width: 0 !important;
    min-height: 40px !important;
    padding: 0.52rem 0.55rem !important;
    border-radius: 12px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-size: 0.8rem !important;
    line-height: 1.05 !important;
    white-space: nowrap !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal .modal-footer > :only-child,
  body .modal-overlay.active > .modal.active.platform-dialog-modal .modal-footer > :only-child,
  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active .modal-footer > :only-child,
  body .bridge-modal-overlay.open .bridge-modal-footer > :only-child {
    grid-column: 1 / -1 !important;
  }

  body #quizModal.quiz-modal-overlay .quiz-modal-actions {
    width: 100% !important;
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 0.48rem !important;
    margin: 0 !important;
  }

  body #quizModal.quiz-modal-overlay .quiz-modal-timer {
    min-width: 70px !important;
    padding: 0.42rem 0.56rem !important;
    border-radius: 13px !important;
  }

  body #quizModal.quiz-modal-overlay .quiz-modal-timer-label {
    display: none !important;
  }

  body #quizModal.quiz-modal-overlay .quiz-modal-timer-value {
    margin: 0 !important;
    font-size: 0.98rem !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal .discussion-modal-intro,
  body .modal-overlay.active > .modal.active.discussion-modal .resource-detail-shell,
  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active .resource-detail-shell,
  body #modalOverlay.modal-overlay.active > #courseModal.course-modal.active .course-modal-empty,
  body #quizModal.quiz-modal-overlay .quiz-question-card {
    padding: 0.72rem !important;
    border-radius: 14px !important;
    box-shadow: none !important;
  }

  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active .resource-detail-surface,
  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active .resource-preview-surface,
  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active .resource-detail-info-card,
  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active .resource-detail-notice,
  body #modalOverlay.modal-overlay.active > #courseModal.course-modal.active .course-modal-section {
    padding: 0.72rem !important;
    border-radius: 14px !important;
    box-shadow: none !important;
  }

  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active .resource-detail-title,
  body #modalOverlay.modal-overlay.active > #courseModal.course-modal.active .course-modal-title {
    font-size: 1.08rem !important;
    line-height: 1.24 !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal .discussion-modal-grid,
  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active .resource-detail-hero,
  body .bridge-modal-overlay.open .bridge-form-grid {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 0.58rem !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal .bridge-form-group,
  body .bridge-modal-overlay.open .bridge-form-group {
    gap: 0.28rem !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal .bridge-form-label,
  body .bridge-modal-overlay.open .bridge-form-label {
    font-size: 0.76rem !important;
    line-height: 1.15 !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal .bridge-form-control,
  body .bridge-modal-overlay.open .bridge-form-control,
  body .modal-overlay.active > .modal.active.platform-dialog-modal .dialog-input {
    min-height: 40px !important;
    padding: 0.56rem 0.66rem !important;
    border-radius: 12px !important;
    font-size: 16px !important;
  }

  body .modal-overlay.active > .modal.active.discussion-modal textarea.bridge-form-control,
  body .bridge-modal-overlay.open textarea.bridge-form-control {
    min-height: 86px !important;
    max-height: 132px !important;
  }

  body #quizModal.quiz-modal-overlay .quiz-options,
  body #quizModal.quiz-modal-overlay .quiz-answer-field {
    padding-left: 0 !important;
  }

  body #quizModal.quiz-modal-overlay .quiz-option {
    min-height: 44px !important;
    padding: 0.62rem 0.72rem !important;
    border-radius: 13px !important;
  }

  body .notification-panel.active {
    top: calc(env(safe-area-inset-top, 0px) + 60px) !important;
    right: 0.58rem !important;
    left: 0.58rem !important;
    max-height: min(40dvh, 320px) !important;
    border-radius: 16px !important;
  }

  body .notification-panel.active .notification-header {
    padding: 0.56rem 0.62rem !important;
  }

  body .notification-panel.active .notification-header-actions {
    display: inline-flex !important;
    align-items: center !important;
    gap: 0.32rem !important;
  }

  body .notification-panel.active .notification-header-action,
  body .notification-panel.active .notification-header-actions button {
    min-width: 34px !important;
    min-height: 34px !important;
    padding: 0.34rem 0.48rem !important;
    border-radius: 999px !important;
    font-size: 0.7rem !important;
    white-space: nowrap !important;
  }
}

@media (max-width: 420px) {
  body .modal-overlay.active > .modal.active.discussion-modal,
  body .modal-overlay.active > .modal.active.platform-dialog-modal,
  body #modalOverlay.modal-overlay.active > #resourceModal.resource-modal.active,
  body #modalOverlay.modal-overlay.active > #courseModal.course-modal.active,
  body .bridge-modal-overlay.open > .bridge-modal-panel,
  body .bridge-modal-overlay.open > .bridge-modal-panel.wide,
  body #quizModal.quiz-modal-overlay > .quiz-modal-shell {
    border-radius: 16px 16px 0 0 !important;
    max-height: calc(96dvh - env(safe-area-inset-top, 0px)) !important;
  }
}

@media (max-width: 768px) {
  #courseSettingsModal .course-cover-settings-card {
    margin: 0 !important;
    padding: 0.68rem !important;
    border-radius: 15px !important;
    gap: 0.64rem !important;
  }

  #courseSettingsModal .course-cover-settings-head {
    align-items: center !important;
    gap: 0.5rem !important;
  }

  #courseSettingsModal .course-cover-settings-head h4 {
    font-size: 0.92rem !important;
    margin: 0.08rem 0 !important;
  }

  #courseSettingsModal .course-cover-settings-head p {
    font-size: 0.74rem !important;
    line-height: 1.32 !important;
  }

  #courseSettingsModal .course-cover-settings-kicker,
  #courseSettingsModal .course-cover-settings-state {
    font-size: 0.68rem !important;
  }

  #courseSettingsModal .course-cover-settings-state {
    min-height: 28px !important;
    padding: 0.28rem 0.56rem !important;
  }

  #courseSettingsModal .course-cover-settings-layout {
    grid-template-columns: 1fr !important;
    gap: 0.62rem !important;
  }

  #courseSettingsModal .course-cover-settings-preview {
    min-height: 132px !important;
    border-radius: 14px !important;
  }

  #courseSettingsModal .course-cover-settings-placeholder {
    padding: 0.72rem !important;
  }

  #courseSettingsModal .course-cover-settings-placeholder strong {
    font-size: 0.95rem !important;
  }

  #courseSettingsModal .course-cover-settings-placeholder span,
  #courseSettingsModal .course-cover-upload-status,
  #courseSettingsModal .course-cover-range-grid label span {
    font-size: 0.72rem !important;
  }

  #courseSettingsModal .course-cover-settings-fields {
    gap: 0.52rem !important;
  }

  #courseSettingsModal .course-cover-settings-fields .form-group {
    padding: 0 !important;
    border: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
  }

  #courseSettingsModal .course-cover-action-row {
    gap: 0.46rem !important;
  }

  #courseSettingsModal .course-cover-action-row > button {
    min-height: 38px !important;
    padding: 0.46rem 0.5rem !important;
    border-radius: 11px !important;
    font-size: 0.76rem !important;
  }

  #courseSettingsModal .course-cover-range-grid {
    gap: 0.42rem !important;
  }

  #courseSettingsModal .course-cover-range-grid label {
    gap: 0.18rem !important;
  }
}
/* Global accessibility safeguards */
.skip-link {
  position: fixed;
  top: max(0.5rem, env(safe-area-inset-top));
  left: max(0.5rem, env(safe-area-inset-left));
  z-index: 100000;
  padding: 0.7rem 1rem;
  border-radius: 0.65rem;
  background: #fff;
  color: #1a2885;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.24);
  transform: translateY(-180%);
  transition: transform 0.16s ease;
}

.skip-link:focus-visible {
  transform: translateY(0);
  outline: 3px solid #1a2885;
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

#modalOverlay[hidden],
#resourceModal[hidden],
#courseModal[hidden] {
  display: none !important;
}

button.user-profile {
  width: 100%;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

:where(h1, h2, h3, h4, h5, h6) {
  scroll-margin-top: 5rem;
  text-wrap: balance;
}

:where(.modal-overlay, .bridge-modal-overlay, .modal, .bridge-modal-panel, .notification-panel) {
  overscroll-behavior: contain;
}

:where(a, button, input, select, textarea, summary, [role="button"], [tabindex="0"]):focus-visible {
  outline: 3px solid #1a2885 !important;
  outline-offset: 3px !important;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto !important;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}