/* Parcours d'apprentissage accessible — complement de cours.css.
   Les codes couleurs sont systematiquement accompagnes de titres lisibles. */
body.lesson-immersive {
  --learn-accent: #5541ae;
  --learn-accent-dark: #46308d;
  --learn-accent-soft: #f0ebff;
  --learn-bg: #f8f6fd;
  --learn-ink: #242640;
  --learn-muted: #51586a;
  --learn-shadow: 0 14px 35px rgba(45, 39, 86, .045);
  background: #f8f8fb;
}
body.lesson-immersive[data-domain="statistiques"] {
  --learn-accent: #0c746b;
  --learn-accent-dark: #09594f;
  --learn-accent-soft: #e6f6f1;
  --learn-bg: #f6fbf9;
}
body.lesson-immersive[data-domain="probabilites"] {
  --learn-accent: #99517b;
  --learn-accent-dark: #75365e;
  --learn-accent-soft: #fcebf4;
  --learn-bg: #fff7fb;
}
body.lesson-immersive[data-domain="reperes"] {
  --learn-accent: #2a649b;
  --learn-accent-dark: #214c79;
  --learn-accent-soft: #eaf4ff;
  --learn-bg: #f5faff;
}
.lesson-immersive .lesson-page { padding-top: 22px; }
.lesson-immersive .lesson-heading {
  max-width: none;
  position: relative;
  isolation: isolate;
  margin: 26px 0 18px;
  padding: clamp(24px, 4vw, 44px);
  background:
    radial-gradient(circle at 100% 0%, var(--learn-accent-soft) 0%, transparent 44%),
    linear-gradient(116deg, #ffffff, var(--learn-bg));
  border: 1px solid #e3dfef;
  border-left: 6px solid var(--learn-accent);
  border-radius: 24px;
  box-shadow: var(--learn-shadow);
  overflow: hidden;
}
.lesson-immersive .lesson-heading::before {
  content: "";
  position: absolute;
  right: -45px;
  bottom: -115px;
  width: 255px;
  height: 255px;
  border: 2px solid var(--learn-accent);
  border-radius: 50%;
  opacity: .12;
  pointer-events: none;
  z-index: -1;
}
.lesson-immersive .lesson-heading::after {
  content: "";
  position: absolute;
  right: 50px;
  bottom: -82px;
  width: 160px;
  height: 160px;
  border: 2px dashed var(--learn-accent);
  border-radius: 50%;
  opacity: .12;
  pointer-events: none;
  z-index: -1;
}
.lesson-immersive .lesson-heading .eyebrow {
  color: var(--learn-accent-dark);
  font-size: 12px;
  letter-spacing: 1.5px;
}
.lesson-immersive .lesson-heading h1 {
  max-width: 800px;
  margin: 16px 0 13px;
  font-size: clamp(30px, 3.9vw, 50px);
  letter-spacing: -1.3px;
  color: var(--learn-ink);
  line-height: 1.14;
}
.lesson-immersive .lesson-heading .lead {
  max-width: 735px;
  color: var(--learn-muted);
  font-size: 16px;
  line-height: 1.75;
}
.learning-path {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 24px;
  align-items: center;
}
.learning-path span {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  padding: 8px 11px;
  font-size: 12px;
  font-weight: 750;
  color: var(--learn-accent-dark);
  background: #fff;
  border: 1px solid #d8d5e3;
  border-radius: 999px;
}
.learning-path span b {
  display: inline-grid;
  place-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--learn-accent-soft);
  color: var(--learn-accent-dark);
}
.lesson-reading-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 22px;
  color: var(--learn-muted);
  font-size: 12px;
}
.lesson-reading-controls > span { margin-right: 5px; font-weight: 650; }
.lesson-reading-controls button {
  background: #fff;
  color: var(--learn-accent-dark);
  border: 1px solid #d0cde0;
  border-radius: 999px;
  min-height: 44px;
  padding: 9px 17px;
  font-size: 13px;
  font-weight: 720;
}
.lesson-reading-controls button:hover { border-color: var(--learn-accent); }
.lesson-reading-controls button[aria-pressed="true"] {
  background: var(--learn-accent);
  color: white;
  border-color: var(--learn-accent);
}
.lesson-reading-controls .research-link {
  text-decoration: underline;
  text-underline-offset: 4px;
  font-weight: 650;
  color: var(--learn-accent-dark);
}
.lesson-immersive .lesson-layout {
  grid-template-columns: 214px minmax(0, 1fr);
  gap: clamp(20px, 2.5vw, 30px);
  align-items: start;
}
/* Sans JS le sommaire reste cache : le contenu prend toute la largeur. */
.lesson-immersive .lesson-layout:has(.lesson-toc[hidden]) {
  grid-template-columns: minmax(0, 1fr);
}
.lesson-immersive .lesson-toc {
  border: 1px solid #dcd9e7;
  border-radius: 20px;
  background: white;
  box-shadow: var(--learn-shadow);
  padding: 24px 16px;
}
.lesson-immersive .lesson-toc h2 {
  color: var(--learn-accent-dark);
  font-size: 14px;
  letter-spacing: -.1px;
}
.lesson-immersive .lesson-toc nav a {
  display: block;
  border-left: 3px solid transparent;
  padding: 8px 9px;
  border-radius: 4px 8px 8px 4px;
  line-height: 1.5;
  color: #4a5165;
  font-size: 12px;
}
.lesson-immersive .lesson-toc nav a:hover,
.lesson-immersive .lesson-toc nav a[aria-current="location"] {
  border-left-color: var(--learn-accent);
  background: var(--learn-accent-soft);
  color: var(--learn-accent-dark);
  font-weight: 750;
}
.lesson-immersive .print-button {
  border: 1px solid #d0cde0;
  color: var(--learn-accent-dark);
  width: 100%;
  min-height: 44px;
}
.lesson-immersive .lesson-content {
  background: #fff;
  border: 1px solid #e2deeb;
  border-radius: 22px;
  box-shadow: var(--learn-shadow);
  padding: clamp(22px, 3.7vw, 44px);
  font-size: 16px;
  color: #303446;
  line-height: 1.85;
}
.lesson-immersive .lesson-content p,
.lesson-immersive .lesson-content li { max-width: 84ch; }
.lesson-immersive .lesson-content p { margin: 13px 0; }
.lesson-immersive .lesson-content > h2 {
  margin: 44px 0 20px;
  font-size: clamp(21px, 2.3vw, 27px);
  line-height: 1.38;
  padding: 12px 12px 14px 19px;
  border-left: 5px solid var(--learn-accent);
  border-radius: 0 10px 10px 0;
  background: linear-gradient(90deg, var(--learn-accent-soft), rgba(255,255,255,0));
  color: var(--learn-ink);
  scroll-margin-top: 28px;
}
.lesson-immersive .lesson-content h3 {
  font-size: 18px;
  color: #25283b;
}
.lesson-immersive .lesson-content > p > strong { color: var(--learn-accent-dark); }
.lesson-immersive .lesson-content .objectives {
  border: 1px solid #b9dced;
  border-left: 5px solid #236c96;
  border-radius: 16px;
  background: linear-gradient(120deg, #eaf6fd, #f6fbff);
  padding: 22px 24px;
  margin: 0 0 28px;
}
.lesson-immersive .lesson-content .objectives h2 {
  color: #174e73;
  font-size: 20px;
  margin: 0 0 12px;
}
.lesson-immersive .lesson-content .objectives h2::before {
  content: "◎ ";
  font-weight: 750;
}
.lesson-immersive .lesson-content .objectives .prerequisites {
  background: #fff;
  padding: 10px 13px;
  border-radius: 8px;
  border: 1px solid #c4deed;
  font-size: 13px;
  color: #3c5161;
}
.lesson-immersive .lesson-content .formula {
  position: relative;
  display: block;
  border: 1px solid #d5c8f1;
  border-left: 5px solid #6843ae;
  border-radius: 13px;
  background: linear-gradient(120deg, #f3ecff, #fcfaff);
  color: #352253;
  padding: 21px 24px 18px;
  margin: 24px 0;
  font-size: 1.12em;
  line-height: 1.9;
  overflow-x: auto;
  overflow-wrap: anywhere;
}
.lesson-immersive .lesson-content .formula::before {
  content: "FORMULE · À RETENIR";
  display: block;
  font: 800 11px/1.2 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #58368e;
  letter-spacing: 1.1px;
  margin: 0 0 12px;
}
.lesson-immersive .lesson-content .example,
.lesson-immersive .lesson-content .warning,
.lesson-immersive .lesson-content .callout,
.lesson-immersive .lesson-content .recap {
  position: relative;
  border-radius: 16px;
  margin: 27px 0;
  padding: 22px 24px;
  border-left-width: 5px;
  border-left-style: solid;
}
.lesson-immersive .lesson-content .example {
  background: #edf9f3;
  border-color: #b6dec8;
  border-left-color: #157553;
}
.lesson-immersive .lesson-content .example::before {
  content: "● EXEMPLE GUIDÉ";
  display: block;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1px;
  line-height: 1.4;
  color: #0d654a;
  margin-bottom: 9px;
}
.lesson-immersive .lesson-content .warning {
  background: #fff8e9;
  border-color: #ead6a5;
  border-left-color: #a96510;
}
.lesson-immersive .lesson-content .warning::before {
  content: "▲ POINT DE VIGILANCE";
  display: block;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .8px;
  color: #855012;
  margin-bottom: 9px;
}
.lesson-immersive .lesson-content .callout {
  background: #f1f0ff;
  border-color: #d6cdf4;
  border-left-color: #5d50b9;
}
.lesson-immersive .lesson-content .recap {
  background: #f6f3ff;
  border-color: #d8cff5;
  border-left-color: #6850aa;
}
.lesson-immersive .lesson-content .recap h2 { color: #4b337f; }
.lesson-immersive .lesson-content .check {
  background: #fafffc;
  border: 1px solid #b7ddc9;
  border-radius: 12px;
}
.lesson-immersive .lesson-content .check summary {
  color: #155f49;
  font-weight: 750;
}
.lesson-immersive .lesson-content .check[open] { background: #f4fcf7; }
.lesson-immersive .lesson-content .figure svg {
  background: #fcfbff;
  border-color: #d8d0e4;
}
.lesson-immersive .lesson-content .figure figcaption {
  color: #505969;
  font-size: 13px;
  border-left: 3px solid var(--learn-accent);
  padding-left: 12px;
}
.lesson-immersive .lesson-content .table-wrap {
  border: 1px solid #ded8e7;
  border-radius: 10px;
}
.lesson-immersive .lesson-content table { width: 100%; border-collapse: collapse; }
.lesson-immersive .lesson-content th { background: #f2f0f9; color: #34314f; }
.lesson-immersive .lesson-content tbody tr:nth-child(even) { background: #fcfbfe; }
.lesson-immersive .course-pagination a {
  background: white;
  border-radius: 12px;
}
.lesson-immersive .course-pagination a:hover {
  border-color: var(--learn-accent);
  color: var(--learn-accent-dark);
}
/* Etayage facultatif : rendre l'aide accessible sans surcharger la page. */
.support-scaffold {
  border: 1px solid #bfdcd4;
  border-left: 5px solid #16726c;
  border-radius: 15px;
  background: #f0faf7;
  margin: 24px 0 34px;
  padding: 0 20px;
}
.support-scaffold summary {
  cursor: pointer;
  padding: 17px 0;
  color: #105b55;
  font-size: 15px;
  font-weight: 800;
}
.support-scaffold summary::marker { color: #0b7467; }
.support-scaffold[open] { padding-bottom: 19px; }
.support-scaffold > p { color: #3d5753; }
.support-scaffold ol { counter-reset: scaffold; list-style: none; padding: 0 !important; }
.support-scaffold li {
  display: flex;
  gap: 13px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px dashed #c9dcd6;
}
.support-scaffold li:last-child { border-bottom: none; }
.support-scaffold li::before {
  counter-increment: scaffold;
  content: counter(scaffold);
  display: grid;
  place-content: center;
  flex: 0 0 27px;
  height: 27px;
  border-radius: 50%;
  background: #d6efe6;
  color: #145c4c;
  font-size: 12px;
  font-weight: 850;
}
/* Rappel actif : question presentee, choix masque sans JavaScript,
   solution en details toujours disponible. */
.study-quiz {
  background: linear-gradient(130deg, #f4f8ff, #fbf9ff);
  border: 1px solid #b9cceb;
  border-left: 5px solid #376aa4;
  border-radius: 18px;
  padding: 24px;
  margin: 34px 0;
}
.study-quiz .study-eyebrow {
  color: #22578e;
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 1.1px;
  text-transform: uppercase;
}
.study-quiz h3 {
  color: #1e466f !important;
  margin: 10px 0 !important;
  font-size: 20px !important;
}
.study-quiz .study-question { font-weight: 650; }
.study-quiz fieldset {
  border: none;
  padding: 0;
  margin: 14px 0;
  min-width: 0;
}
.study-quiz legend { font-weight: 700; margin-bottom: 10px; }
.study-choices {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 10px;
}
.study-choices label {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  background: #fff;
  border: 1px solid #bdc9da;
  border-radius: 10px;
  padding: 12px;
  font-size: 15px;
  cursor: pointer;
  min-width: 0;
  line-height: 1.5;
}
.study-choices label:has(input:checked) {
  border-color: #426d9f;
  box-shadow: inset 0 0 0 1px #426d9f;
  background: #eef5ff;
}
.study-choices input { flex: 0 0 auto; margin-top: 4px; accent-color: #315f8a; }
.study-quiz .study-submit {
  background: #235d95;
  color: white;
  border: none;
  border-radius: 10px;
  min-height: 44px;
  padding: 11px 18px;
  font-size: 14px;
  font-weight: 750;
}
.study-quiz .study-submit:hover { background: #184777; }
.study-quiz .study-feedback {
  margin: 14px 0 0;
  padding: 12px 14px;
  border-radius: 9px;
  border: 1px solid transparent;
  font-size: 14px;
  line-height: 1.5;
}
.study-quiz .study-feedback:empty { display: none; }
.study-quiz .study-feedback[data-result="correct"] {
  background: #e2f5e9;
  color: #155b3d;
  border-color: #afd8c0;
}
.study-quiz .study-feedback[data-result="retry"] {
  background: #fff4e1;
  color: #794513;
  border-color: #e7cca2;
}
.study-solution { margin-top: 12px; border-top: 1px solid #cbd6e8; padding-top: 12px; }
.study-solution summary { cursor: pointer; color: #245588; font-size: 14px; font-weight: 750; }
.study-solution[open] p { margin: 10px 0 0 !important; }
.study-review {
  background: #f7f4ff;
  border: 1px solid #ddd3f2;
  border-radius: 18px;
  padding: 24px;
  margin: 28px 0;
}
.study-review h3 { margin: 0 0 8px !important; color: #50368a !important; }
.study-review > p { color: #49516b; font-size: 14px; }
.study-review ol { display: grid; gap: 12px; margin-bottom: 0 !important; padding-left: 22px !important; }
.study-review li::marker { color: #5942ad; font-weight: 900; }
.study-review .review-cta {
  display: inline-flex;
  background: #5541ae;
  color: #fff !important;
  text-decoration: none;
  padding: 11px 17px;
  border-radius: 11px;
  font-size: 14px;
  font-weight: 750;
  margin-top: 17px;
}
.study-review .review-cta:hover { background: #42308e; }
body.reading-large .lesson-content { font-size: 19px; line-height: 1.94; }
body.reading-large .lesson-content .study-quiz { font-size: 18px; }
body.reading-large .lesson-content .study-choices label { font-size: 17px; }
body.reading-large .lesson-content .study-quiz .study-feedback { font-size: 16px; }
body.reading-focus .lesson-layout { grid-template-columns: minmax(0, 1fr); }
body.reading-focus .lesson-toc { display: none; }
body.reading-focus .lesson-content { max-width: 880px; margin-inline: auto; width: 100%; }
@media (max-width: 960px) {
  .lesson-immersive .lesson-layout { grid-template-columns: 190px minmax(0, 1fr); }
  .lesson-immersive .lesson-content { padding: 26px; }
}
@media (max-width: 740px) {
  .lesson-immersive .lesson-layout { grid-template-columns: minmax(0, 1fr); }
  .lesson-immersive .lesson-toc { position: static; max-height: none; }
  .lesson-immersive .lesson-heading { margin-top: 20px; }
  .lesson-immersive .lesson-content { padding: 24px; }
}
@media (max-width: 520px) {
  .lesson-immersive .lesson-heading { padding: 25px 20px; border-radius: 17px; border-left-width: 4px; }
  .lesson-immersive .lesson-heading h1 { letter-spacing: -.8px; }
  .lesson-immersive .lesson-content { padding: 22px 17px; font-size: 16px; line-height: 1.75; }
  .lesson-immersive .lesson-content > h2 { margin-top: 35px; padding-left: 14px; }
  .lesson-immersive .lesson-content .objectives, .lesson-immersive .lesson-content .example,
  .lesson-immersive .lesson-content .warning, .lesson-immersive .lesson-content .callout,
  .lesson-immersive .lesson-content .recap, .study-quiz, .study-review { padding: 20px 17px; }
  .lesson-immersive .lesson-content .formula { padding: 18px 15px; }
  .learning-path { gap: 7px; }
  .learning-path span { padding: 7px 9px; }
  body.reading-large .lesson-content { font-size: 19px; }
}
@media (prefers-reduced-motion: reduce) {
  .lesson-immersive * { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}
@media print {
  .lesson-immersive .site-header, .lesson-immersive .site-footer,
  .lesson-immersive .lesson-toc, .lesson-reading-controls, .learning-path,
  .study-quiz form, .study-review .review-cta { display: none !important; }
  .lesson-immersive .lesson-heading { padding: 0; border: none; background: white; box-shadow: none; }
  .lesson-immersive .lesson-content { border: 0; box-shadow: none; padding: 0; }
  .lesson-immersive .lesson-content > h2 { background: #eee; }
  .lesson-immersive .lesson-content .formula, .study-review,
  .lesson-immersive .lesson-content .example { break-inside: avoid; }
  .support-scaffold:not([open]) > *:not(summary) { display: block !important; }
  .support-scaffold summary { display: none; }
}
/* Catalogue des lecons : les 16 cartes restent filtrables comme avant. */
.lessons-page .page-intro {
  position: relative;
  border: 1px solid #e1d9ef;
  border-radius: 23px;
  padding: clamp(24px, 3.5vw, 38px);
  background: linear-gradient(115deg, #fff, #f2edff 72%, #eaf7f3);
  overflow: hidden;
}
.lessons-page .page-intro h1 { color: #282440; }
.lessons-page .page-intro > p:last-child { max-width: 760px; color: #47445a; line-height: 1.75; }
.catalog-learning-guide {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 13px;
  margin: 26px 0;
}
.catalog-learning-guide article {
  min-width: 0;
  display: grid;
  align-content: start;
  gap: 8px;
  padding: 21px;
  border: 1px solid #dcd7e7;
  border-top: 4px solid #5745a8;
  border-radius: 14px;
  background: #fff;
}
.catalog-learning-guide article:nth-child(2) { border-top-color: #0c7664; background: #f9fdfa; }
.catalog-learning-guide article:nth-child(3) { border-top-color: #a3651a; background: #fffdf9; }
.catalog-learning-guide h2 { font-size: 16px; color: #29253e; margin: 0; }
.catalog-learning-guide p { font-size: 13px; line-height: 1.65; color: #535366; }
.catalog-learning-guide .guide-number {
  font-size: 11px;
  letter-spacing: 1px;
  font-weight: 850;
  color: #5d50a8;
}
.catalog-learning-guide article:nth-child(2) .guide-number { color: #0d6755; }
.catalog-learning-guide article:nth-child(3) .guide-number { color: #86500e; }
.lessons-page .catalog-group > h2 { color: #29263d; }
.lessons-page .lesson-card {
  border-top: 4px solid var(--card-color, #604bd1);
  box-shadow: 0 10px 24px rgba(42, 33, 80, .04);
  transition: transform .16s, box-shadow .16s, border-color .16s;
}
.lessons-page .lesson-card[data-category="analyse"] { --card-color: #5844bd; }
.lessons-page .lesson-card[data-category="statistiques"] { --card-color: #0c746b; }
.lessons-page .lesson-card[data-category="probabilites"] { --card-color: #99517b; }
.lessons-page .lesson-card[data-category="reperes"] { --card-color: #2a649b; }
.lessons-page .lesson-card .course-code,
.lessons-page .lesson-card .read-link { color: var(--card-color); }
.lessons-page .lesson-card:hover { box-shadow: 0 17px 30px rgba(42, 33, 80, .08); }
.lessons-page .lesson-card h3 { font-size: 19px; }
.lessons-page .catalog-notice a { color: #493197; }
@media (max-width: 740px) {
  .catalog-learning-guide { grid-template-columns: minmax(0, 1fr); }
  .catalog-learning-guide article { padding: 17px 19px; }
}
@media (prefers-reduced-motion: reduce) {
  .lessons-page .lesson-card { transition: none; }
}