/* Boîte / Infobulle de définition interactive */
.glossary-popover {
  position: absolute;
  z-index: 99999;
  max-width: 330px;
  width: calc(100vw - 32px);
  background: var(--school-card-bg, #ffffff);
  border: 1.5px solid var(--school-border, #cbd5e1);
  border-radius: var(--school-radius-md, 14px);
  padding: 14px 16px;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.12);
  animation: glossaryPopIn 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  font-family: var(--school-font);
  color: var(--school-text, #1e293b);
}

[data-bs-theme="dark"] .glossary-popover {
  background: rgba(18, 24, 38, 0.95);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
}

@keyframes glossaryPopIn {
  from { opacity: 0; transform: scale(0.92) translateY(6px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.glossary-popover-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--school-border, #e2e8f0);
  padding-bottom: 6px;
}

.glossary-popover-title {
  font-weight: 800;
  font-size: 1.05rem;
  color: #0284c7;
  margin: 0;
}

[data-bs-theme="dark"] .glossary-popover-title {
  color: #38bdf8;
}

.glossary-popover-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  background: rgba(2, 132, 199, 0.12);
  color: #0284c7;
  border-radius: 999px;
  padding: 2px 8px;
}

[data-bs-theme="dark"] .glossary-popover-badge {
  background: rgba(56, 189, 248, 0.18);
  color: #7dd3fc;
}

.glossary-popover-close {
  background: none;
  border: none;
  font-size: 1.15rem;
  color: var(--school-text-muted, #64748b);
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
  transition: color 0.15s ease;
}
.glossary-popover-close:hover {
  color: var(--school-text, #0f172a);
}

.glossary-popover-def {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--school-text, #334155);
  margin-bottom: 8px;
}

.glossary-popover-example {
  font-size: 0.82rem;
  background: var(--school-surface-alt, #f8fafc);
  border-left: 3px solid #0284c7;
  padding: 6px 10px;
  border-radius: 6px;
  color: var(--school-text-muted, #475569);
  margin: 0;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 17, 21, 0.55);
  z-index: 40;
}

.sidebar-overlay.open {
  display: block;
}

@media (max-width: 991.98px) {
  .school-breadcrumb {
    padding: 12px 16px 0;
  }

  .school-sidebar {
    position: fixed;
    top: var(--school-header-h, 68px);
    left: 0;
    bottom: 0;
    z-index: 50;
    background: var(--school-bg);
    overflow-y: auto;
    transform: translateX(-105%);
    transition: transform 0.22s ease;
    box-shadow: 4px 0 16px rgba(0, 0, 0, 0.12);
  }

  .school-sidebar.open {
    transform: translateX(0);
  }

  .school-content {
    padding: 20px 16px;
  }
}

@media (min-width: 992px) {
  .sidebar-toggle-btn {
    display: none;
  }
}

/* --- Squelettes de chargement --- */
.skeleton-line {
  height: 16px;
  border-radius: var(--school-radius-pill);
  margin-bottom: 10px;
  background: linear-gradient(90deg, var(--school-surface-alt) 25%, var(--school-border) 37%, var(--school-surface-alt) 63%);
  background-size: 400% 100%;
  animation: skeleton-shimmer 1.4s ease infinite;
}

.skeleton-line.w-60 { width: 60%; }
.skeleton-line.w-80 { width: 80%; }
.skeleton-line.w-40 { width: 40%; }

@keyframes skeleton-shimmer {
  0% { background-position: 100% 50%; }
  100% { background-position: 0 50%; }
}

.school-content {
  flex: 1;
  padding: 28px 32px;
}

.school-layout {
  min-height: calc(100vh - 68px);
}

.sidebar-section-title {
  font-family: var(--school-font);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--school-primary-dark);
  margin: 4px 4px 10px;
  padding-left: 10px;
  border-left: 3px solid var(--school-primary);
}

.school-menu-item {
  display: block;
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  border-radius: var(--school-radius-md);
  padding: 10px 14px;
  margin-bottom: 4px;
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--school-text);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.school-menu-item:hover {
  background: linear-gradient(90deg, var(--school-primary-soft) 0%, rgba(20, 184, 166, 0.05) 100%);
  color: var(--school-primary-dark);
  transform: translateX(4px);
  box-shadow: 0 2px 10px rgba(15, 118, 110, 0.1), inset 3px 0 0 var(--school-primary);
}

.school-menu-item.active {
  background: var(--school-primary-soft);
  color: var(--school-primary-dark);
  font-weight: 800;
  box-shadow: inset 4px 0 0 var(--school-primary);
}

.school-menu-item[data-toggle] {
  position: relative;
  padding-right: 30px;
}

.school-menu-item[data-toggle]::after {
  content: '›';
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%) rotate(0deg);
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1), color 0.2s ease;
  font-weight: 700;
  color: var(--school-text-muted);
}

.school-menu-item[data-toggle]:hover::after {
  color: var(--school-primary);
}

.school-menu-item[data-toggle].menu-toggle-open::after {
  transform: translateY(-50%) rotate(90deg);
  color: var(--school-primary-dark);
}

.school-submenu {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transform: translateY(-6px);
  transition: max-height 0.32s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.26s ease, transform 0.26s ease;
  margin: 0 0 0 10px;
  border-left: 3px solid var(--school-border);
  padding-left: 10px;
}

.school-submenu.open {
  max-height: 4000px;
  opacity: 1;
  transform: translateY(0);
  margin: 2px 0 10px 10px;
}

.school-grand-menu-title {
  font-size: 0.95rem;
  font-weight: 800;
  padding: 11px 14px;
  margin-bottom: 6px;
  background: var(--school-surface, #ffffff);
  border: 1px solid var(--school-border);
  border-radius: var(--school-radius-md);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.school-grand-menu-title:hover {
  background: var(--school-primary-soft);
  border-color: var(--school-primary);
  transform: translateX(4px);
}

.school-grand-menu-title.menu-toggle-open {
  background: var(--school-primary-soft);
  border-color: var(--school-primary);
  color: var(--school-primary-dark);
}

.school-grand-submenu {
  border-left: 2px solid var(--school-border);
  margin: 0 0 0 6px;
  padding-left: 8px;
}

.school-grand-submenu.open {
  max-height: 5000px;
  margin: 4px 0 12px 6px;
}

.school-submenu-nested {
  border-left-color: var(--school-primary, #14b8a6);
  margin-left: 4px;
}

.school-submenu-nested.open {
  max-height: 2500px;
  margin: 2px 0 6px 14px;
}

.school-submenu .school-menu-item {
  font-size: 0.88rem;
  font-weight: 600;
  padding: 8px 12px;
}

.school-submenu .school-menu-item:hover {
  background: var(--school-primary-soft);
  color: var(--school-primary-dark);
  transform: translateX(4px);
  box-shadow: inset 2px 0 0 var(--school-primary);
}

.submenu-group-label {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--school-primary-dark);
  margin: 10px 0 4px 4px;
}

.school-sidebar-separator {
  border: none;
  border-top: 3px solid var(--school-primary);
  border-radius: var(--school-radius-pill);
  margin: 20px 4px;
}

.school-level-selector {
  margin: 18px 4px 0;
  background: var(--school-surface);
  border: 1px solid var(--school-border);
  border-radius: var(--school-radius-md);
  padding: 12px;
}

/* --- Cartes --- */
.school-card {
  background: var(--school-surface);
  border-radius: var(--school-radius-lg);
  box-shadow: var(--school-shadow-card);
  padding: 24px;
}

/* --- Barre de progression --- */
.school-progress {
  height: 14px;
  border-radius: var(--school-radius-pill);
  background: var(--school-surface-alt);
  overflow: hidden;
}

.school-progress-bar {
  height: 100%;
  background: var(--school-primary);
  border-radius: var(--school-radius-pill);
}

/* --- Quiz --- */
.quiz-choice {
  display: block;
  width: 100%;
  text-align: left;
  padding: 14px 18px;
  border: 2px solid var(--school-border);
  border-radius: var(--school-radius-md);
  background: var(--school-surface);
  font-weight: 600;
  font-size: 0.96rem;
  color: var(--school-text);
  cursor: pointer;
  transition: border-color 0.1s ease, background 0.1s ease;
}

.quiz-choice:hover:not(:disabled) {
  border-color: var(--school-primary);
  background: var(--school-primary-soft);
}

.quiz-choice:disabled { cursor: default; }

.quiz-choice.correct {
  border-color: var(--school-success);
  background: var(--school-success-soft);
  color: var(--school-success-text);
  animation: quiz-pulse 0.35s ease;
}

.quiz-choice.incorrect {
  border-color: var(--school-danger);
  background: var(--school-danger-soft);
  color: var(--school-danger-text);
  animation: quiz-shake 0.35s ease;
}

@keyframes quiz-pulse {
  0% { transform: scale(1); }
  40% { transform: scale(1.03); }
  100% { transform: scale(1); }
}

@keyframes quiz-shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

.quiz-explanation {
  font-weight: 600;
  color: var(--school-text-muted);
  min-height: 1.2em;
}

#quiz-input-answer {
  font-size: 1.15rem;
  font-weight: 600;
  border: 2px solid var(--school-border);
  border-radius: var(--school-radius-md);
  padding: 10px 14px;
}

#quiz-input-answer:focus {
  border-color: var(--school-primary);
  box-shadow: 0 0 0 3px var(--school-primary-soft);
}

#quiz-input-answer.is-valid {
  border-color: var(--school-success);
  background: var(--school-success-soft);
  color: var(--school-success-text);
  animation: quiz-pulse 0.35s ease;
}

#quiz-input-answer.is-invalid {
  border-color: var(--school-danger);
  background: var(--school-danger-soft);
  color: var(--school-danger-text);
  animation: quiz-shake 0.35s ease;
}

/* --- Cartes mentales --- */
.mindmap-picker {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.mindmap-picker-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 18px 14px;
  border: 2px solid var(--school-border);
  border-radius: var(--school-radius-lg);
  background: var(--school-surface);
  cursor: pointer;
  text-align: center;
  font-weight: 700;
  transition: border-color 0.1s ease, transform 0.08s ease;
}

.mindmap-picker-card:hover {
  border-color: var(--school-primary);
  transform: translateY(-2px);
}

.mindmap-picker-card img { width: 64px; height: 64px; }