/* ============================================================
   Mode Parcours — CSS autonome
   Design system EduQuest — palette moderne
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --c-cream:      #F8F9FC;
  --c-cream-2:    #E8ECF0;
  --c-teal:       #6C5CE7;
  --c-teal-dark:  #4834D4;
  --c-coral:      #FF6B6B;
  --c-coral-soft: #FFE0E0;
  --c-yellow:     #FDCB6E;
  --c-yellow-soft:#FFF3D6;
  --c-mint:       #00B894;
  --c-lilac:      #A29BFE;
  --c-ink:        #2D3436;
  --c-ink-soft:   #636E72;
  --c-dark:       #2D3436;

  --font-title: 'Inter', 'Nunito', system-ui, sans-serif;
  --font-body:  'Nunito', system-ui, sans-serif;

  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 20px;

  --shadow-md: 0 4px 16px rgba(0, 0, 0, .08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, .10);
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--c-ink);
  background: var(--c-cream);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }

/* ---- Switch mode ---- */
.mode-switch {
  position: fixed;
  top: 14px; left: 14px;
  z-index: 999;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--c-teal-dark);
  padding: 8px 16px;
  border-radius: var(--r-sm);
  text-decoration: none;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: .85rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--c-cream-2);
  transition: all .2s;
}
.mode-switch:hover { transform: translateY(-2px); background: #fff; box-shadow: var(--shadow-lg); }

/* ============================================================
   HEADER (tableau de bord & module)
   ============================================================ */
.mod-header, .mod-module-header {
  background: linear-gradient(135deg, #6C5CE7 0%, #4834D4 40%, #3D1FA8 100%);
  color: #fff;
  padding: 48px 20px 44px;
  text-align: center;
  position: relative;
}
.mod-header-inner {
  max-width: 900px;
  margin: 0 auto;
}

.mod-badge {
  display: inline-block;
  background: rgba(255,255,255,.15);
  backdrop-filter: blur(8px);
  color: #fff;
  border-radius: var(--r-sm);
  padding: 6px 18px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: .82rem;
  border: 1px solid rgba(255,255,255,.2);
  margin-bottom: 14px;
  letter-spacing: .3px;
}

.mod-header h1, .mod-module-header h1 {
  font-family: var(--font-title);
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -.5px;
  margin-bottom: 8px;
  text-shadow: 0 3px 0 rgba(0,0,0,.12);
}

.mod-subtitle {
  font-size: clamp(.95rem, 2vw, 1.15rem);
  opacity: .95;
  font-weight: 600;
  margin-bottom: 24px;
}

.mod-global-progress {
  height: 14px;
  background: rgba(255,255,255,.2);
  border-radius: 50px;
  overflow: hidden;
  max-width: 500px;
  margin: 18px auto 10px;
  border: 2px solid rgba(255,255,255,.35);
}
.mod-global-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--c-yellow), var(--c-coral));
  border-radius: 50px;
  transition: width .6s ease;
}
.mod-global-progress-label {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1rem;
  opacity: .95;
}

.mod-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 18px;
}
.mod-badge-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,.2);
  border: 2px solid rgba(255,255,255,.35);
  padding: 6px 14px;
  border-radius: 50px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: .88rem;
}
.mod-badge-emoji { font-size: 1.1rem; }
.mod-badges-empty {
  opacity: .7;
  font-style: italic;
  font-size: .9rem;
}

/* ============================================================
   LAYOUT principal
   ============================================================ */
.mod-main { padding: 50px 20px 60px; }
.mod-container { max-width: 1100px; margin: 0 auto; }

/* ============================================================
   TABLEAU DE BORD — grille de modules
   ============================================================ */
.mod-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
  margin-bottom: 40px;
}

.mod-card {
  display: block;
  background: #fff;
  border-radius: var(--r-md);
  padding: 24px 22px 20px;
  text-decoration: none;
  color: var(--c-ink);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--c-cream-2);
  border-top: 4px solid var(--c-teal);
  transition: transform .2s, box-shadow .2s, border-color .2s;
  position: relative;
}
.mod-card:hover:not(.locked) {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--c-lilac);
}
.mod-card.locked {
  opacity: .55;
  cursor: not-allowed;
  filter: grayscale(.5);
}

.mod-card-coral  { border-top-color: #FF6B6B; }
.mod-card-teal   { border-top-color: #6C5CE7; }
.mod-card-yellow { border-top-color: #FDCB6E; }
.mod-card-mint   { border-top-color: #00B894; }
.mod-card-lilac  { border-top-color: #A29BFE; }
.mod-card-grape  { border-top-color: #E84393; }

.mod-card-top {
  display: flex;
  justify-content: space-between;
  font-size: .88rem;
  font-family: var(--font-title);
  font-weight: 700;
  color: var(--c-ink-soft);
  margin-bottom: 8px;
}
.mod-card-state {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 50px;
  background: var(--c-cream-2);
}
.mod-card.done .mod-card-state {
  background: #d7f5e9;
  color: #1a6b4a;
}
.mod-card.failed .mod-card-state {
  background: var(--c-coral-soft);
  color: #9c2626;
}
.mod-card.in-progress .mod-card-state {
  background: var(--c-yellow);
  color: var(--c-teal-dark);
}
.mod-card.locked .mod-card-state {
  background: #e4e4e4;
  color: #666;
}

.mod-card-emoji {
  font-size: 2.8rem;
  margin: 6px 0 8px;
  display: inline-block;
}

.mod-card h3 {
  font-family: var(--font-title);
  font-size: 1.2rem;
  color: var(--c-teal-dark);
  margin-bottom: 8px;
}
.mod-card p {
  font-size: .95rem;
  margin-bottom: 10px;
}
.mod-card-meta {
  font-size: .88rem !important;
  color: var(--c-ink-soft);
  font-weight: 600;
  margin: 0 !important;
}

/* ---- Carte examen ---- */
.mod-exam-card {
  display: flex;
  align-items: center;
  gap: 22px;
  background: linear-gradient(135deg, #fff 0%, #fff8e7 100%);
  border-radius: var(--r-lg);
  padding: 26px 28px;
  box-shadow: var(--shadow-md);
  border: 3px solid var(--c-yellow);
  text-decoration: none;
  color: var(--c-ink);
  transition: transform .25s, box-shadow .25s;
  margin: 40px 0 30px;
}
.mod-exam-card:hover:not(.locked) {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.mod-exam-card.locked { opacity: .55; cursor: not-allowed; filter: grayscale(.6); }
.mod-exam-card.done { border-color: var(--c-mint); }

.mod-exam-card-emoji { font-size: 3.5rem; animation: bounce 2s ease-in-out infinite; flex-shrink: 0; }
.mod-exam-card-text h3 {
  font-family: var(--font-title);
  color: var(--c-teal-dark);
  font-size: 1.35rem;
  margin-bottom: 4px;
}
.mod-exam-card-state {
  font-family: var(--font-title);
  color: var(--c-coral);
  font-weight: 700;
  margin-top: 6px;
}
.mod-exam-card.done .mod-exam-card-state { color: #1a6b4a; }
.mod-exam-card.locked .mod-exam-card-state { color: var(--c-ink-soft); font-style: italic; }

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

.mod-reset-wrap { text-align: center; margin-top: 30px; }
.mod-btn-text {
  background: none;
  border: 2px dashed var(--c-coral);
  color: var(--c-coral);
  padding: 8px 18px;
  border-radius: 50px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: .85rem;
  cursor: pointer;
}
.mod-btn-text:hover { background: var(--c-coral-soft); }

/* ============================================================
   FIL D'ARIANE (breadcrumb)
   ============================================================ */
.mod-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 12px 20px;
  font-family: var(--font-title);
  font-size: .88rem;
  font-weight: 600;
  color: var(--c-ink-soft);
  max-width: 1100px;
  margin: 0 auto;
}
.mod-breadcrumb a {
  color: var(--c-teal);
  text-decoration: none;
}
.mod-breadcrumb a:hover {
  text-decoration: underline;
  color: var(--c-coral);
}
.mod-breadcrumb-sep {
  color: var(--c-cream-2);
  font-size: .7rem;
}
.mod-breadcrumb-current {
  color: var(--c-ink);
  font-weight: 700;
}

/* ============================================================
   PAGE MODULE
   ============================================================ */
.mod-module-header { padding: 50px 20px 40px; }

.mod-step-progress {
  height: 10px;
  background: rgba(255,255,255,.2);
  border-radius: 50px;
  overflow: hidden;
  max-width: 450px;
  margin: 18px auto 6px;
  border: 2px solid rgba(255,255,255,.35);
}
.mod-step-progress-bar {
  height: 100%;
  background: var(--c-yellow);
  transition: width .4s ease;
}
.mod-step-counter {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: .9rem;
  opacity: .9;
}

.mod-step {
  background: #fff;
  border-radius: var(--r-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--c-cream-2);
  margin-bottom: 28px;
  animation: fadeIn .4s ease;
}
.mod-step-fun {
  background: var(--c-yellow-soft);
  border-left: 6px solid var(--c-coral);
}
.mod-step h2 {
  font-family: var(--font-title);
  color: var(--c-teal-dark);
  font-size: 1.6rem;
  margin-bottom: 16px;
}
.mod-step-body {
  font-size: 1.1rem;
  line-height: 1.75;
}
.mod-step-body strong { color: var(--c-coral); font-weight: 800; }

.mod-step-figure {
  margin-top: 22px;
  text-align: center;
}
.mod-step-figure img {
  width: 100%;
  max-width: 600px;
  border-radius: var(--r-md);
  box-shadow: var(--shadow-md);
  border: 4px solid #fff;
}
.mod-step-figure figcaption {
  font-size: .9rem;
  color: var(--c-ink-soft);
  font-style: italic;
  margin-top: 10px;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Navigation module ---- */
.mod-module-nav {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.mod-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--c-teal);
  color: #fff;
  border: none;
  border-radius: var(--r-sm);
  font-family: var(--font-title);
  font-weight: 700;
  font-size: .95rem;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(108,92,231,.3);
  transition: all .15s;
}
.mod-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(108,92,231,.4);
}
.mod-btn:active {
  transform: translateY(1px);
  box-shadow: 0 1px 4px rgba(108,92,231,.2);
}
.mod-btn:disabled {
  background: #ccc;
  cursor: not-allowed;
  box-shadow: none;
}
.mod-btn-secondary {
  background: #fff;
  color: var(--c-teal-dark);
  border: 1px solid var(--c-cream-2);
  box-shadow: var(--shadow-md);
}
.mod-btn-secondary:hover {
  border-color: var(--c-teal);
}
.mod-btn-next {
  background: var(--c-teal);
}

/* ============================================================
   QUIZ
   ============================================================ */
#quiz-area, #exam-quiz-area {
  background: #fff;
  border-radius: var(--r-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--c-cream-2);
  margin-bottom: 30px;
}

.mod-quiz-intro {
  text-align: center;
  margin-bottom: 22px;
}
.mod-quiz-intro h2 {
  font-family: var(--font-title);
  color: var(--c-teal-dark);
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.mod-quiz-progress {
  height: 12px;
  background: var(--c-cream-2);
  border-radius: 50px;
  overflow: hidden;
  margin-bottom: 6px;
}
.mod-quiz-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--c-yellow), var(--c-coral));
  transition: width .4s ease;
}
.mod-quiz-counter {
  text-align: right;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: .85rem;
  color: var(--c-ink-soft);
  margin-bottom: 20px;
}

.mod-quiz-question {
  font-family: var(--font-title);
  font-size: 1.3rem;
  color: var(--c-teal-dark);
  margin-bottom: 20px;
  text-align: center;
}

.mod-quiz-options {
  display: grid;
  gap: 14px;
}
.mod-quiz-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  min-height: 52px;
  background: var(--c-cream);
  border: 2px solid var(--c-cream-2);
  border-radius: var(--r-md);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-ink);
  cursor: pointer;
  text-align: left;
  transition: all .15s;
}
.mod-quiz-option:hover:not(:disabled) {
  background: #F0EDFF;
  border-color: var(--c-lilac);
  transform: translateX(4px);
}
.mod-quiz-option-icon { font-size: 1.5rem; flex-shrink: 0; }

.mod-quiz-option.correct {
  background: #D5F5ED;
  border-color: var(--c-mint);
  color: #00785C;
  animation: pulse .6s ease;
}
.mod-quiz-option.wrong {
  background: var(--c-coral-soft);
  border-color: var(--c-coral);
  color: #C62828;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.04); }
}

.mod-quiz-feedback {
  margin-top: 18px;
  padding: 16px 20px;
  border-radius: var(--r-md);
  font-weight: 600;
  font-size: .98rem;
  line-height: 1.6;
}
.mod-quiz-feedback.correct-fb { background: #d7f5e9; border: 2px solid var(--c-mint); color: #1a6b4a; }
.mod-quiz-feedback.wrong-fb   { background: var(--c-coral-soft); border: 2px solid var(--c-coral); color: #9c2626; }
.mod-quiz-feedback { display: flex; flex-wrap: wrap; align-items: flex-start; gap: 10px; }
.quiz-fb-icon { font-size: 1.5rem; line-height: 1; }
.quiz-fb-text { flex: 1; min-width: 200px; }
.quiz-fb-detail { font-weight: 400; margin-top: 4px; font-size: .9rem; opacity: .9; }
.quiz-fb-source {
  width: 100%;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed currentColor;
  font-size: .82rem;
  font-weight: 400;
  font-style: italic;
  opacity: .75;
}
.quiz-fb-source i { margin-right: 4px; }

.mod-quiz-actions {
  display: flex;
  justify-content: center;
  margin-top: 18px;
}

.mod-quiz-result {
  text-align: center;
  padding: 20px 0;
}
.mod-quiz-result-emoji {
  font-size: 4rem;
  animation: bounce 1.5s ease-in-out infinite;
}
.mod-quiz-result h3 {
  font-family: var(--font-title);
  color: var(--c-teal-dark);
  font-size: 1.6rem;
  margin: 10px 0 8px;
}
.mod-quiz-result-score {
  font-size: 1.15rem;
  margin-top: 12px;
}
.mod-quiz-result-score strong {
  font-family: var(--font-title);
  color: var(--c-coral);
  font-size: 1.4rem;
}

.mod-quiz-aftermath {
  margin-top: 26px;
  text-align: center;
  padding-top: 22px;
  border-top: 2px dashed var(--c-cream-2);
}
.mod-quiz-passed {
  font-family: var(--font-title);
  color: #1a6b4a;
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 14px;
}
.mod-quiz-failed {
  font-family: var(--font-title);
  color: var(--c-coral);
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 14px;
}

.mod-quiz-actions-final {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ============================================================
   EXAMEN
   ============================================================ */
.mod-module-header-exam {
  background: linear-gradient(135deg, #4A69BD 0%, #3D4FA8 40%, #2D3A9D 100%);
}

.mod-exam-intro { margin-bottom: 30px; }
.mod-exam-intro-card {
  background: #fff;
  border-radius: var(--r-lg);
  padding: 32px 30px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  border: 4px solid var(--c-yellow);
}
.mod-exam-intro-card h2 {
  font-family: var(--font-title);
  color: var(--c-teal-dark);
  font-size: 1.7rem;
  margin-bottom: 14px;
}
.mod-exam-intro-card ul {
  list-style: none;
  display: inline-block;
  text-align: left;
  margin: 14px 0 22px;
}
.mod-exam-intro-card li {
  padding: 6px 0;
  font-size: 1.05rem;
}

.mod-exam-final {
  padding: 32px 30px;
  border-radius: var(--r-lg);
  text-align: center;
  box-shadow: var(--shadow-lg);
  margin-top: 20px;
  animation: fadeIn .5s ease;
}
.mod-exam-final-win {
  background: linear-gradient(135deg, var(--c-mint), #a2e4bd);
  border: 4px solid #1a6b4a;
}
.mod-exam-final-lose {
  background: linear-gradient(135deg, var(--c-coral-soft), #ffdbdb);
  border: 4px solid var(--c-coral);
}
.mod-exam-final-emoji { font-size: 5rem; animation: bounce 1.5s ease-in-out infinite; }
.mod-exam-final h2 {
  font-family: var(--font-title);
  font-size: 1.7rem;
  margin: 10px 0;
  color: var(--c-teal-dark);
}
.mod-exam-final p { margin-bottom: 8px; font-size: 1.05rem; }

/* ============================================================
   FOOTER
   ============================================================ */
.mod-footer {
  background: #fff;
  color: var(--c-ink-soft);
  text-align: center;
  padding: 28px 20px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: .88rem;
  border-top: 1px solid var(--c-cream-2);
}
.mod-footer a {
  color: var(--c-ink-soft);
  text-decoration: none;
  transition: color .15s;
}
.mod-footer a:hover { color: var(--c-teal); }

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* ---- Tablette (641px – 1024px) ---- */
@media (max-width: 1024px) and (min-width: 641px) {
  .mod-header, .mod-module-header { padding: 50px 20px 40px; }
  .mod-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 18px;
  }
  .mod-step { padding: 30px 26px; }
  .mod-exam-card { padding: 22px 24px; }
  .mod-quiz-options { gap: 16px; }
  .mod-quiz-option { padding: 18px 22px; min-height: 56px; }
}

/* ---- Mobile (≤ 640px) ---- */
@media (max-width: 640px) {
  .mod-header, .mod-module-header { padding: 40px 16px 30px; }
  .mod-main { padding: 30px 16px 40px; }
  .mod-step { padding: 24px 20px; }
  .mod-module-nav { flex-direction: column; }
  .mod-module-nav .mod-btn { width: 100%; justify-content: center; min-height: 48px; }
  .mod-exam-card { flex-direction: column; text-align: center; }
  .mode-switch { font-size: .8rem; padding: 6px 12px; }

  /* Cibles tactiles agrandies sur mobile */
  .mod-quiz-options { gap: 16px; }
  .mod-quiz-option { padding: 18px 20px; min-height: 56px; font-size: 1.05rem; }
  .mod-btn { min-height: 48px; padding: 16px 24px; }
  .mod-btn-text { min-height: 44px; padding: 10px 18px; }
  .mod-card { padding: 20px 18px 18px; }
}

/* Bouton diplôme dans l'écran de fin d'examen */
.mod-btn-diploma {
  background: linear-gradient(135deg, #c9a34e 0%, #e5c27a 100%);
  color: var(--c-teal-dark);
  box-shadow: 0 5px 0 rgba(0, 0, 0, .18);
}
.mod-btn-diploma:hover {
  background: linear-gradient(135deg, #d3b469 0%, #f0d699 100%);
}

/* ============================================================
   FOCUS VISIBLE (Accessibilité)
   ============================================================ */
:focus-visible {
  outline: 3px solid var(--c-yellow);
  outline-offset: 2px;
}

/* ============================================================
   TRANSITIONS PANELS (bienvenue.html)
   ============================================================ */
.bv-form-panel {
  animation: bvSlideIn .35s ease-out;
}
@keyframes bvSlideIn {
  from { opacity: 0; transform: translateX(30px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* Titre de section active dans bienvenue */
.bv-section-title {
  font-family: var(--font-title);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--c-teal-dark);
  margin-bottom: 18px;
  text-align: center;
}

/* Erreurs accessibles (bienvenue) */
.bienvenue-error {
  background: #fef2f2;
  border: 2px solid var(--c-coral);
  border-radius: var(--r-sm);
  padding: 10px 14px;
  color: #991b1b;
  font-weight: 700;
  font-size: .92rem;
  display: flex;
  align-items: center;
  gap: 8px;
}
.bienvenue-error::before {
  content: '⚠️';
  font-size: 1.1rem;
  flex-shrink: 0;
}

/* ============================================================
   ANIMATION CÉLÉBRATION (module validé)
   ============================================================ */
.mod-quiz-passed {
  animation: celebrationPop .6s ease-out;
}
@keyframes celebrationPop {
  0%   { opacity: 0; transform: scale(.5); }
  60%  { transform: scale(1.15); }
  100% { opacity: 1; transform: scale(1); }
}

/* ============================================================
   BARRE PROGRESSION CHAPITRES (chapitres.html)
   ============================================================ */
.chapitres-progress {
  margin-top: 12px;
}
.chapitres-progress-bar-wrap {
  height: 8px;
  background: rgba(0,0,0,.08);
  border-radius: 50px;
  overflow: hidden;
  margin-bottom: 6px;
}
.chapitres-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--c-yellow), var(--c-coral));
  border-radius: 50px;
  transition: width .6s ease;
}
.chapitres-progress-label {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: .82rem;
  color: var(--c-ink-soft);
}

/* ============================================================
   BOUTON CHAPITRES (second lien fixe)
   ============================================================ */
.mode-switch-chapters {
  position: fixed;
  top: 54px; left: 14px;
  z-index: 999;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--c-teal-dark);
  padding: 8px 16px;
  border-radius: var(--r-sm);
  text-decoration: none;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: .85rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--c-cream-2);
  transition: all .2s;
}
.mode-switch-chapters:hover { transform: translateY(-2px); background: #fff; box-shadow: var(--shadow-lg); }

@media (max-width: 640px) {
  .mode-switch-chapters { font-size: .8rem; padding: 6px 12px; top: 48px; }
}