/* --- Carte mentale "pieuvre" : idée centrale + ramifications courbes --- */
.mindmap-radial {
  position: relative;
  padding-top: 10px;
}

.mindmap-connectors {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.mindmap-hub {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 16px;
  justify-content: center;
  margin: 0 auto 8px;
  padding: 18px 28px;
  max-width: fit-content;
  background: var(--school-text);
  color: #fff;
  border-radius: var(--school-radius-lg);
  box-shadow: var(--school-shadow-card);
}

.mindmap-hub img { width: 64px; height: 64px; flex-shrink: 0; }
.mindmap-hub h1 { margin: 0; color: #fff; font-size: 1.3rem; }

.mindmap-branches-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 48px 28px;
  margin-top: 56px;
}

.mindmap-branch {
  border-radius: var(--school-radius-lg);
  padding: 16px 18px;
  border: 3px solid var(--mm-color, var(--school-primary));
  background: var(--mm-bg, var(--school-primary-soft));
}

.mindmap-branch-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.02rem;
  margin-bottom: 10px;
  color: var(--mm-color, var(--school-primary-dark));
}

.mindmap-icon-bubble {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  border-radius: 50%;
  background: #fff;
  font-size: 1.05rem;
  box-shadow: 0 2px 0 rgba(0,0,0,0.08);
}

.mindmap-branch ul { list-style: none; margin: 0; padding: 0; }

.mindmap-branch > ul > li {
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 8px;
  padding-left: 14px;
  border-left: 3px solid var(--mm-color, var(--school-primary));
}

.mindmap-branch .mindmap-sub {
  font-weight: 400;
  font-size: 0.84rem;
  color: var(--school-text-muted);
  margin: 4px 0 0 14px;
  list-style: disc;
}

.mindmap-date-badge {
  display: inline-block;
  background: var(--school-xp-soft);
  color: #92620a;
  font-weight: 800;
  font-size: 0.78rem;
  padding: 1px 8px;
  border-radius: var(--school-radius-pill);
  margin: 0 2px;
}

/* --- Footer --- */
.school-footer {
  background: var(--school-surface);
  border-top: 1px solid var(--school-border);
  padding: 40px 0 24px;
  margin-top: 40px;
  color: var(--school-text-muted);
  font-size: 0.9rem;
}

.footer-col-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--school-text);
  margin-bottom: 12px;
}

.footer-links-list {
  list-style: none;
  padding-left: 0;
  margin-bottom: 0;
}

.footer-links-list li {
  margin-bottom: 8px;
}

.school-footer a {
  color: var(--school-text-muted);
  text-decoration: none;
  transition: color .15s ease;
}

.school-footer a:hover {
  color: var(--school-primary-dark);
  text-decoration: underline;
}

.footer-bottom-bar {
  border-color: var(--school-border) !important;
  font-size: 0.82rem;
}

/* --- Géocalc --- */
.shape-btn { transition: all .15s; }

.result-card { animation: geocalc-fade-in .25s ease; }
@keyframes geocalc-fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0);   }
}

.formula-table td { padding: 3px 10px 3px 0; vertical-align: top; }

#results:empty { display: none; }

/* --- Sélecteur de niveau global --- */
.level-gate-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: var(--school-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.level-gate-overlay.d-none { display: none; }

.level-gate-card {
  max-width: 640px;
  width: 100%;
  min-width: 0;
  background: var(--school-surface);
  border: 1px solid var(--school-border);
  border-radius: var(--school-radius-lg);
  padding: 40px;
  text-align: center;
  overflow-wrap: break-word;
}

@media (max-width: 575.98px) {
  .level-gate-card {
    padding: 24px 16px;
  }
}

.level-gate-group-title {
  text-transform: uppercase;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--school-text-muted);
  margin-bottom: 12px;
}

.level-gate-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.level-gate-btn {
  border: 2px solid var(--school-border);
  background: var(--school-bg);
  border-radius: var(--school-radius-pill);
  padding: 10px 20px;
  font-weight: 700;
  color: var(--school-text);
  cursor: pointer;
  transition: all .15s;
}

.level-gate-btn:hover {
  border-color: var(--school-primary);
  color: var(--school-primary-dark);
}

/* --- MODE LISEUSE PLEIN ÉCRAN / ZEN FOCUS (SURIMPRESSION TOTALE) --- */
body.zen-reader-active {
  overflow: hidden !important;
}

body.zen-reader-active .school-header,
body.zen-reader-active .school-sidebar,
body.zen-reader-active .sidebar-overlay,
body.zen-reader-active .lesson-sidebar,
body.zen-reader-active .school-breadcrumb,
body.zen-reader-active .school-footer,
body.zen-reader-active .lesson-active-sheet-details {
  display: none !important;
}

body.zen-reader-active .school-layout {
  padding: 0 !important;
  margin: 0 !important;
  max-width: 100vw !important;
}

body.zen-reader-active .school-content-wrap,
body.zen-reader-active .school-content {
  padding: 0 !important;
  margin: 0 !important;
  max-width: 100vw !important;
}

body.zen-reader-active .lesson-book-layout {
  position: static !important;
  width: 100vw !important;
  height: 100vh !important;
  max-width: 100vw !important;
  margin: 0 !important;
  padding: 0 !important;
}

body.zen-reader-active .lesson-page-container {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  z-index: 100000 !important;
  background: var(--school-bg, #f8fafc) !important;
  margin: 0 !important;
  padding: 16px 32px 20px 32px !important;
  box-sizing: border-box !important;
  overflow-y: auto !important;
  overflow-x: hidden !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
}

body.zen-reader-active .zen-toolbar-container {
  width: 100% !important;
  max-width: 1200px !important;
  margin-bottom: 12px !important;
  padding-right: 64px !important; /* Espace réservé pour le bouton rond de fermeture en haut à droite */
}

body.zen-reader-active .lesson-flip-book-wrapper {
  max-width: 1260px !important;
  width: 100% !important;
  height: calc(100vh - 100px) !important;
  min-height: 520px !important;
  margin: 0 auto !important;
  flex: 1 !important;
  background: transparent !important;
}

body.zen-reader-active .lesson-flip-book {
  max-width: 1200px !important;
  width: 100% !important;
  height: 100% !important;
  min-height: 500px !important;
}

/* Bouton circulaire de fermeture du mode Zen (haut à droite) */
.zen-close-circle-btn {
  display: none;
  position: fixed;
  top: 14px;
  right: 20px;
  z-index: 100010;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--school-surface, #ffffff);
  color: #ef4444;
  border: 2px solid #ef4444;
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.25), 0 2px 6px rgba(0, 0, 0, 0.08);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 0;
}

.zen-close-circle-btn:hover {
  background: #ef4444;
  color: #ffffff;
  transform: scale(1.1) rotate(90deg);
  box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
}

.zen-close-circle-btn:active {
  transform: scale(0.95);
}

body.zen-reader-active .zen-close-circle-btn {
  display: flex !important;
}

.zen-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  background: var(--school-surface-alt);
  padding: 6px 12px;
  border-radius: var(--school-radius-md, 12px);
  border: 1px solid var(--school-border);
  flex-wrap: wrap;
}

.zen-btn {
  border: 1px solid var(--school-border);
  background: var(--school-surface);
  color: var(--school-text);
  border-radius: 8px;
  padding: 4px 10px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.zen-btn:hover {
  background: var(--school-primary-soft);
  color: var(--school-primary-dark);
}

.zen-btn.active {
  background: #dc2626 !important;
  color: #ffffff !important;
  border-color: #b91c1c !important;
  box-shadow: 0 2px 8px rgba(220, 38, 38, 0.35);
}

/* Thèmes de papier de lecture */
.lesson-book-sheet.paper-sepia,
.lesson-flip-page.paper-sepia {
  background-color: #fcf6e8 !important;
  color: #433422 !important;
  border-color: #ebdcb9 !important;
}

.lesson-book-sheet.paper-oled,
.lesson-flip-page.paper-oled {
  background-color: #0b0f19 !important;
  color: #e2e8f0 !important;
  border-color: #1e293b !important;
}

body.zen-reader-active:has(.lesson-flip-page.paper-sepia) .lesson-page-container {
  background: #f7f1e1 !important;
}

body.zen-reader-active:has(.lesson-flip-page.paper-oled) .lesson-page-container {
  background: #060910 !important;
}

.lesson-book-sheet {
  font-size: var(--lesson-font-size, 16px);
}