/* Pages de cours statiques (cours/…) générées par scripts/build_seo_pages.js.
   Chargé après style.css, landing.css et katex.min.css. */

.cours-page { overflow-x: hidden; }

.cours-wrapper {
  max-width: 920px;
  gap: 1.75rem;
  width: 100%;
  min-width: 0; /* body est en flex : indispensable pour éviter le débordement sur mobile */
}


/* Focus visible */
.cours-page a:focus-visible,
.cours-page summary:focus-visible,
.cours-page button:focus-visible {
  outline: 3px solid var(--border-focus);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Liens dans le texte : contraste AA et soulignement */
.cours-wrapper a:not([class]) {
  color: var(--primary-text);
  text-decoration: underline;
  text-underline-offset: 2px;
}
[data-theme="dark"] .cours-wrapper a:not([class]) { color: #93c5fd; }

/* Fil d'Ariane */
.cours-breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.cours-breadcrumb li + li::before {
  content: "›";
  margin-right: 0.5rem;
  color: var(--text-muted);
}
.cours-breadcrumb a { color: var(--text-muted); text-decoration: underline; text-underline-offset: 2px; }
.cours-breadcrumb a:hover { color: var(--primary-text); }
.cours-breadcrumb [aria-current] { color: var(--text-main); font-weight: 600; }

/* En-tête de page */
.cours-hero {
  background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-subtle) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-sm);
}
.cours-hero .landing-tag { margin-bottom: 0.75rem; }
.cours-title {
  font-size: clamp(1.45rem, 1.1rem + 1.6vw, 2rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 0.75rem;
  overflow-wrap: anywhere;
  hyphens: auto;
}
.cours-lead {
  font-size: 1.02rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  max-width: 70ch;
}
.cours-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.cours-cta a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 700;
}
.cours-cta-main {
  font-size: 1.05rem;
  padding: 0.85rem 1.5rem;
}
.cours-cta-alt {
  font-size: 0.95rem;
  padding: 0.75rem 1.1rem;
}

/* Sommaire */
.cours-toc {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  padding: 1rem 1.25rem;
}
.cours-toc-title {
  font-weight: 800;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}
.cours-toc ol {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(240px, 100%), 1fr));
  gap: 0.3rem 2rem;
  padding-left: 1.4rem;
}
.cours-toc a { color: var(--text-main); text-decoration: underline; text-underline-offset: 2px; }
.cours-toc a:hover { color: var(--primary-text); }

/* Sections */
.cours-section { min-width: 0; scroll-margin-top: 5.5rem; }
.cours-section > h2 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--primary-border);
}
.cours-note { color: var(--text-muted); margin-bottom: 1rem; }

.cours-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.4rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
  min-width: 0;
  overflow-wrap: break-word;
  line-height: 1.7;
}
.cours-card > h3 {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}
.cours-card .math-p:last-child { margin-bottom: 0; }
.cours-card .math-h4, .cours-card .math-h5, .cours-card .math-h6, .cours-subhead {
  font-size: 1rem;
  font-weight: 700;
  margin: 1rem 0 0.5rem;
  color: var(--text-main);
}
.cours-method { border-left: 4px solid var(--primary); }
.cours-theorem { border-left: 4px solid var(--tier-4-strong, #7c3aed); }

.cours-list {
  padding-left: 1.4rem;
  line-height: 1.7;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem 1rem 2.4rem;
}
.cours-list li + li { margin-top: 0.4rem; }
.cours-card .cours-list { border: 0; padding: 0 0 0 1.4rem; background: none; }
.cours-traps { border-left: 4px solid var(--danger); }
.cours-traps li::marker { color: var(--danger-text); }

.cours-example {
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  margin-bottom: 0.85rem;
}
.cours-example-label {
  font-weight: 800;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--primary-text);
  margin-bottom: 0.35rem;
}
[data-theme="dark"] .cours-example-label { color: #93c5fd; }
.cours-steps { padding-left: 1.5rem; }
.cours-steps li + li { margin-top: 0.5rem; }
.cours-steps .math-p { margin-bottom: 0.3rem; }

/* Formules : jamais de débordement de page, défilement local si nécessaire */
.cours-wrapper .katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  max-width: 100%;
  padding: 0.25rem 0;
}
.cours-wrapper .katex { font-size: 1.08em; }
.cours-wrapper .geo-figure-wrapper svg, .cours-wrapper .cours-card > svg { max-width: 100%; height: auto; }
.cours-wrapper .math-table-container { max-width: 100%; overflow-x: auto; }
.cours-wrapper pre { max-width: 100%; overflow-x: auto; }

/* Exercices corrigés */
.cours-exo > h3 { display: flex; flex-wrap: wrap; gap: 0.35rem 0.6rem; align-items: baseline; }
.cours-exo-num {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #fff;
  background: var(--primary-fill-hover);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}
.cours-tier {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
}
.cours-mcq { padding-left: 1.6rem; margin: 0.5rem 0 0.75rem; }
.cours-mcq li + li { margin-top: 0.3rem; }
.cours-answer { margin-bottom: 0.6rem; }

.cours-page details {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-top: 0.75rem;
  background: var(--bg-surface);
}
.cours-page summary {
  cursor: pointer;
  padding: 0.6rem 0.9rem;
  font-weight: 700;
  color: var(--primary-text);
  list-style-position: inside;
}
[data-theme="dark"] .cours-page summary { color: #93c5fd; }
.cours-page details[open] > summary { border-bottom: 1px solid var(--border-color); }
.cours-page details > div { padding: 0.85rem 1rem; min-width: 0; }
.cours-solution { border-color: var(--success-border); }
.cours-solution[open] { background: var(--success-bg); }
.cours-hint summary { color: var(--text-muted); font-weight: 600; }

.cours-flashcards { display: grid; gap: 0.5rem; }
/* important : prime sur une règle concurrente plus spécifique ou plus tardive */
.cours-flash { margin-top: 0 !important; }
.cours-flash summary { color: var(--text-main); font-weight: 600; }

/* Encadré d'appel à l'entraînement */
.cours-cta-box {
  background: var(--primary-subtle);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}
.cours-cta-box-title { font-size: 1.2rem; font-weight: 800; margin-bottom: 0.35rem; color: var(--text-main); }
.cours-cta-box p { margin-bottom: 1rem; color: var(--text-main); }

/* Navigation précédent / suivant */
.cours-pager {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
}
.cours-pager-link {
  flex: 1 1 200px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  text-decoration: none;
  color: var(--text-main);
  transition: var(--transition);
}
.cours-pager-link:hover { border-color: var(--primary); }
.cours-pager-link span { font-size: 0.8rem; color: var(--text-muted); font-weight: 600; }
.cours-pager-link strong { font-size: 0.92rem; }
.cours-pager-up { flex: 0 1 160px; text-align: center; }
.cours-pager-next { text-align: right; }

/* Page de niveau : liste des chapitres */
.cours-chapter-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(380px, 100%), 1fr));
  gap: 0.75rem;
}
.cours-chapter-card {
  height: 100%;
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.9rem 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-main);
  transition: var(--transition);
  min-width: 0;
}
.cours-chapter-card:hover { border-color: var(--primary); box-shadow: var(--shadow-sm); }
.cours-chapter-text { display: flex; flex-direction: column; gap: 0.25rem; min-width: 0; }
.cours-chapter-text strong { font-size: 0.98rem; line-height: 1.35; }
.cours-chapter-text span { font-size: 0.85rem; color: var(--text-muted); line-height: 1.45; }
.cours-wrapper > .cours-pager .nav-portal-btn { font-size: 0.85rem; padding: 6px 12px; }
.cours-wrapper > .cours-pager:has(.nav-portal-btn) { justify-content: flex-start; gap: 0.5rem; }

/* Sommaire général */
.cours-level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(400px, 100%), 1fr));
  gap: 1rem;
}
.cours-level-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.25rem;
  min-width: 0;
}
.cours-level-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 0.6rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem 0.6rem;
}
.cours-level-card h3 a { color: var(--primary-text); text-decoration: none; display: inline-block; min-width: 24px; padding: 0 0.2rem; }
[data-theme="dark"] .cours-level-card h3 a { color: #93c5fd; }
.cours-level-card h3 a:hover { text-decoration: underline; }
.cours-count { font-size: 0.8rem; font-weight: 600; color: var(--text-muted); }
.cours-level-card ul { padding-left: 1.1rem; font-size: 0.9rem; line-height: 1.5; }
.cours-level-card .cours-cat-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary-text);
  margin: 0.9rem 0 0.35rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--border-color);
}
.cours-level-card h3 + .cours-cat-title { margin-top: 0.2rem; padding-top: 0; border-top: 0; }
[data-theme="dark"] .cours-level-card .cours-cat-title { color: #93c5fd; }
.cours-level-card li + li { margin-top: 0.3rem; }
.cours-level-card li a { color: var(--text-main); text-decoration: none; }
.cours-level-card li a:hover { color: var(--primary-text); text-decoration: underline; }

/* Pied de page */
.cours-footer {
  text-align: center;
  padding: 2rem 1rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.85rem;
  display: grid;
  gap: 0.4rem;
}
.cours-footer a { color: var(--text-muted); text-decoration: underline; }

/* Mobile */
@media (max-width: 640px) {
  .cours-page .app-header { position: static; }
  .cours-page .header-inner { flex-direction: column; align-items: flex-start; gap: 0.6rem; padding: 0.6rem 1rem; }
  .cours-page .nav-portal-links { gap: 0.35rem; }
  .cours-wrapper { padding: 1.25rem 1rem 3rem; gap: 1.25rem; }
  .cours-hero { padding: 1.4rem 1.1rem; }
  .cours-card { padding: 1rem; }
  .cours-cta a { flex: 1 1 100%; }
  .cours-list { padding: 0.85rem 0.9rem 0.85rem 2rem; }
  .cours-pager-up, .cours-pager-next { text-align: left; }
  .cours-wrapper .katex { font-size: 1em; }
}

/* Impression : contenu seul, détails dépliés */
@media print {
  .app-header, .cours-footer, .cours-cta, .cours-cta-box, .cours-pager, .cours-toc, .cours-skip, .cours-breadcrumb { display: none; }
  body { display: block; background: #fff; color: #000; }
  .cours-wrapper { max-width: none; padding: 0; gap: 1rem; }
  /* important : impression, prime sur les styles d'écran, le thème sombre et le JS */
  .cours-hero, .cours-card, .cours-list, .cours-page details { box-shadow: none; background: #fff !important; border-color: #999; }
  .cours-hero { padding: 0 0 0.5rem; border: 0; border-bottom: 2px solid #000; border-radius: 0; }
  .cours-title, .cours-section > h2, .cours-card > h3 { color: #000; }
  .cours-lead, .cours-tier, .cours-note { color: #333; }
  .cours-card, .cours-exo, .katex-display { break-inside: avoid; }
  .cours-section > h2 { break-after: avoid; border-bottom-color: #000; }
  .cours-page details > div { display: block; }
  .cours-page details::details-content { content-visibility: visible; display: block; }
  .cours-page details > summary { border: 0; color: #000; }
  .cours-exo-num { background: none; color: #000; padding: 0; }
  .cours-wrapper .katex-display { overflow: visible; }
}

/* ---------------------------------------------------------------------------
   Ajouts SEO (31/10/2026) : sur-titre du H1, maillage interne, FAQ, pages piliers
   (exercices-de-maths/, reviser-le-brevet-de-maths/, reussir-le-bac-de-maths/, entrainement-maths/)
   --------------------------------------------------------------------------- */
.cours-title-kicker {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--primary-text);
  margin-bottom: 0.35rem;
}
[data-theme="dark"] .cours-title-kicker { color: #93c5fd; }

/* Chapitres liés / pour aller plus loin */
.cours-related {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr));
  gap: 1rem 1.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.25rem;
}
.cours-related-title {
  font-weight: 800;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 0.45rem;
}
.cours-related ul { list-style: none; display: grid; gap: 0.35rem; font-size: 0.92rem; line-height: 1.4; }
.cours-related-lvl {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full, 999px);
  padding: 0 6px;
  white-space: nowrap;
}

/* FAQ */
.cours-faq { display: grid; gap: 0.5rem; }
.cours-page .cours-faq-item { margin-top: 0; }
.cours-faq-item > summary h3 { display: inline; font-size: 1rem; font-weight: 700; color: var(--text-main); }
.cours-faq-item > div p { line-height: 1.65; color: var(--text-main); }

/* Pages piliers */
.hub-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(140px, 100%), 1fr));
  gap: 0.6rem;
  margin-top: 1.25rem;
}
.hub-facts li {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.6rem 0.8rem;
  display: flex;
  flex-direction: column;
}
.hub-facts strong { font-size: 1.35rem; font-weight: 800; color: var(--primary-text); line-height: 1.2; }
[data-theme="dark"] .hub-facts strong { color: #93c5fd; }
.hub-facts span { font-size: 0.8rem; color: var(--text-muted); }
.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
  gap: 1rem;
}
.hub-grid > .cours-card { margin-bottom: 0; }
.cours-section > p { line-height: 1.7; margin-bottom: 0.85rem; }
.hub-chapters { list-style: none; display: grid; gap: 0.4rem; }
.hub-chapters li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.75rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  line-height: 1.4;
}
.hub-chapters li > a:first-child { flex: 1 1 220px; min-width: 0; }
.cours-card .hub-chapters li { border: 0; border-bottom: 1px solid var(--border-color); border-radius: 0; padding: 0.45rem 0; background: none; }
.cours-card .hub-chapters li:last-child { border-bottom: 0; }
.cours-wrapper a.hub-train {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary-text);
  border: 1px solid var(--primary-border);
  background: var(--primary-subtle);
  border-radius: var(--radius-full, 999px);
  padding: 2px 10px;
  text-decoration: none;
  white-space: nowrap;
}
.cours-wrapper a.hub-train:hover { background: var(--primary-fill); color: #fff; }
[data-theme="dark"] .cours-wrapper a.hub-train { color: #93c5fd; }
.hub-steps { padding-left: 1.5rem; display: grid; gap: 0.6rem; line-height: 1.65; }
.hub-table-wrap { max-width: 100%; overflow-x: auto; margin-bottom: 0.85rem; }
.hub-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-surface);
  font-size: 0.92rem;
  line-height: 1.5;
}
.hub-table th, .hub-table td { border: 1px solid var(--border-color); padding: 0.55rem 0.75rem; text-align: left; vertical-align: top; }
.hub-table thead th { background: var(--bg-subtle); font-weight: 800; }
.hub-table tbody th { font-weight: 700; white-space: nowrap; }
.hub-more > summary { font-size: 0.95rem; }
.hub-exo-more { margin-top: 0.85rem; font-size: 0.9rem; color: var(--text-muted); }
/* important : prime sur une règle concurrente plus spécifique ou plus tardive */
.hub-inline { list-style: none; display: flex !important; flex-wrap: wrap; gap: 0.35rem 0.9rem; }
.hub-pills a, .hub-tags li {
  display: inline-block;
  padding: 4px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full, 999px);
  background: var(--bg-surface);
}
.hub-level-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(250px, 100%), 1fr));
  gap: 0.6rem;
  margin-bottom: 0.85rem;
}
@media (max-width: 640px) {
  .hub-table tbody th { white-space: normal; }
  .hub-table th, .hub-table td { padding: 0.45rem 0.5rem; }
}
@media print {
  .cours-related { display: none; }
  .cours-faq-item > div { display: block; }
}
.hub-chapters + .cours-note, .hub-grid + .cours-note { margin-top: 0.85rem; }