/* Layout : rail de navigation bleu nuit (programme de la journée) à gauche, colonne de lecture + laboratoires à droite.
   Identité inspirée de Beyond Data Group : bleu nuit, Urbanist, arcs épais menthe / violet / lavande, cartes à grand coin arrondi.
   Principe visuel : la page applique ce qu'elle enseigne — des gris lavande, et une seule couleur d'emphase (violet). */
:root {
  --navy: #030649;
  --navy-2: #2d2f67;
  --cyan: #4eeaff;
  --mint: #2ce3a0;
  --violet: #850fea;
  --lavender: #e6e6f4;

  --paper: #ffffff;
  --surface: #ffffff;
  --surface-2: #f5f5fa;
  --ink: #030649;
  --ink-2: #2d2f67;
  --muted: #575985;
  --line: #e6e6f4;
  --line-strong: #cfd0e4;
  --emph: #850fea;
  --emph-ink: #850fea;
  --emph-wash: #f6edfd;
  --mark: #c4c5da;
  --mark-2: #8182a4;
  --good: #00805f;
  --bad: #d12f2f;
  --c1: #850fea; --c2: #00a07c; --c3: #eb6834; --c4: #2a78d6;
  --c5: #e87ba4; --c6: #eda100; --c7: #008300; --c8: #e34948;
  --seq1: #cde2fb; --seq2: #9ec5f4; --seq3: #6da7ec; --seq4: #3987e5; --seq5: #256abf; --seq6: #184f95; --seq7: #0d366b;
  --div-mid: #ecebf3;

  --f-display: "Urbanist", "Segoe UI", system-ui, sans-serif;
  --f-body: "Urbanist", "Segoe UI", system-ui, sans-serif;
  --f-mono: "Urbanist", "Segoe UI", system-ui, sans-serif;

  --r: 12px;
  --r-card: 40px 6px 6px 6px;
  --shadow: 0 2px 4px rgba(3, 6, 73, .04), 0 12px 32px rgba(3, 6, 73, .08);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper: #04073a; --surface: #0b0f45; --surface-2: #141a5c; --ink: #f2f3fb; --ink-2: #c9cae0;
    --muted: #a3a5c6; --line: #222866; --line-strong: #353b7c; --emph: #a95cf5; --emph-ink: #c99bff;
    --emph-wash: #2a1a6b; --mark: #3b417f; --mark-2: #6a6fa6; --good: #2ce3a0; --bad: #ff6b6b;
    --c1: #a95cf5; --c2: #199e70; --c3: #d95926; --c4: #3987e5; --c5: #d55181; --c6: #c98500; --c7: #008300; --c8: #e66767;
    --seq1: #1b2160; --seq2: #184f95; --seq3: #1c5cab; --seq4: #2a78d6; --seq5: #5598e7; --seq6: #86b6ef; --seq7: #cde2fb;
    --div-mid: #353b7c;
    --shadow: 0 2px 4px rgba(0, 0, 0, .25), 0 12px 32px rgba(0, 0, 0, .3);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #04073a; --surface: #0b0f45; --surface-2: #141a5c; --ink: #f2f3fb; --ink-2: #c9cae0;
  --muted: #a3a5c6; --line: #222866; --line-strong: #353b7c; --emph: #a95cf5; --emph-ink: #c99bff;
  --emph-wash: #2a1a6b; --mark: #3b417f; --mark-2: #6a6fa6; --good: #2ce3a0; --bad: #ff6b6b;
  --c1: #a95cf5; --c2: #199e70; --c3: #d95926; --c4: #3987e5; --c5: #d55181; --c6: #c98500; --c7: #008300; --c8: #e66767;
  --seq1: #1b2160; --seq2: #184f95; --seq3: #1c5cab; --seq4: #2a78d6; --seq5: #5598e7; --seq6: #86b6ef; --seq7: #cde2fb;
  --div-mid: #353b7c;
  --shadow: 0 2px 4px rgba(0, 0, 0, .25), 0 12px 32px rgba(0, 0, 0, .3);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { animation: none !important; transition: none !important; } }
body {
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 var(--f-body);
  -webkit-font-smoothing: antialiased;
}
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 30; background: var(--paper); }
h1, h2, h3, h4 { font-family: var(--f-display); line-height: 1.12; text-wrap: balance; margin: 0; letter-spacing: -0.01em; }
p { margin: 0; }
a { color: var(--emph-ink); text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--emph); outline-offset: 2px; border-radius: 4px; }
button { font: inherit; color: inherit; }
.mono { font-family: var(--f-mono); }
.num { font-variant-numeric: tabular-nums; }

/* ---------- Shell ---------- */
.shell {
  display: grid;
  grid-template-columns: 272px minmax(0, 1fr);
  min-height: 100%;
}
.rail {
  position: sticky; top: env(safe-area-inset-top, 0px);
  height: calc(100vh - env(safe-area-inset-top, 0px));
  overflow-y: auto;
  border-right: 1px solid var(--line);
  padding: 28px 18px 28px max(18px, env(safe-area-inset-left, 0px));
  display: flex; flex-direction: column; gap: 22px;
}
.brand { display: flex; flex-direction: column; gap: 4px; }
.brand b { font-family: var(--f-display); font-size: 22px; letter-spacing: -0.02em; }
.brand span { font-size: 13px; color: var(--muted); }
.rail-label { font: 600 11px/1 var(--f-mono); text-transform: uppercase; letter-spacing: .12em; color: var(--muted); }
.agenda { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.agenda a {
  display: grid; grid-template-columns: 46px 1fr; gap: 8px; align-items: baseline;
  padding: 7px 10px; border-radius: 8px; text-decoration: none; color: var(--ink-2); font-size: 14.5px; line-height: 1.3;
}
.agenda a .t { font: 500 12px var(--f-mono); color: var(--muted); font-variant-numeric: tabular-nums; }
.agenda a:hover { background: var(--surface-2); color: var(--ink); }
.agenda a.active { background: var(--emph-wash); color: var(--ink); }
.agenda a.active .t { color: var(--emph-ink); }
.agenda .break a { color: var(--muted); font-style: italic; }
.progress { height: 4px; background: var(--line); border-radius: 4px; overflow: hidden; }
.progress i { display: block; height: 100%; width: 0; background: var(--emph); transition: width .2s; }
.rail-foot { margin-top: auto; font-size: 12.5px; color: var(--muted); display: flex; flex-direction: column; gap: 8px; }

main {
  padding-block: 0 80px;
  padding-left: max(28px, env(safe-area-inset-left, 0px));
  padding-right: max(28px, env(safe-area-inset-right, 0px));
  min-width: 0;
}
.wrap { max-width: 1040px; margin: 0 auto; }
.prose { max-width: 68ch; }

@media (max-width: 920px) {
  .shell { grid-template-columns: 1fr; }
  .rail {
    position: sticky; top: env(safe-area-inset-top, 0px); height: auto; z-index: 20;
    flex-direction: row; align-items: center; gap: 12px; overflow-x: auto; overflow-y: hidden;
    padding: 10px max(16px, env(safe-area-inset-right, 0px)) 10px max(16px, env(safe-area-inset-left, 0px));
    border-right: 0; border-bottom: 1px solid var(--line); background: var(--paper);
  }
  .brand span, .rail-label, .rail-foot, .progress { display: none; }
  .brand b { font-size: 17px; white-space: nowrap; }
  .agenda { flex-direction: row; gap: 4px; }
  .agenda a { grid-template-columns: auto; white-space: nowrap; padding: 6px 10px; font-size: 13.5px; }
  .agenda a .t { display: none; }
  .agenda .break { display: none; }
  main { padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
}

/* ---------- Hero ---------- */
.hero { padding-block: 64px 40px; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 40px; align-items: center; }
.eyebrow { font: 600 12px/1 var(--f-mono); text-transform: uppercase; letter-spacing: .12em; color: var(--muted); display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.eyebrow .pill { color: var(--emph-ink); background: var(--emph-wash); padding: 5px 8px; border-radius: 99px; letter-spacing: .08em; }
.hero h1 { font-size: clamp(40px, 6vw, 72px); font-weight: 700; letter-spacing: -0.035em; margin-top: 16px; }
.hero h1 em { font-style: normal; color: var(--emph); }
.hero .lead { font-size: 19px; color: var(--ink-2); margin-top: 20px; max-width: 56ch; }
.hero-meta { display: flex; gap: 28px; margin-top: 28px; flex-wrap: wrap; }
.hero-meta div { display: flex; flex-direction: column; }
.hero-meta b { font-family: var(--f-display); font-size: 28px; }
.hero-meta span { font-size: 13px; color: var(--muted); }
.hero-fig { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 18px; box-shadow: var(--shadow); }
.hero-fig figcaption { font-size: 13px; color: var(--muted); margin-top: 10px; }
.hero-toggle { display: flex; gap: 6px; margin-bottom: 10px; }
@media (max-width: 820px) { .hero { grid-template-columns: 1fr; padding-block: 36px 24px; } }

/* ---------- Sections ---------- */
section.module { padding-block: 56px 8px; border-top: 1px solid var(--line); }
.mod-head { display: flex; flex-direction: column; gap: 12px; margin-bottom: 22px; }
.mod-head h2 { font-size: clamp(30px, 4vw, 44px); font-weight: 700; letter-spacing: -0.03em; }
.mod-head .lead { font-size: 18.5px; color: var(--ink-2); max-width: 64ch; }
.prose p + p { margin-top: 12px; }
h3 { font-size: 23px; margin: 36px 0 12px; font-weight: 650; }
h4 { font-size: 17px; font-weight: 650; }
.stack { display: flex; flex-direction: column; gap: 14px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 860px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

ul.points { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 10px; }
ul.points li { padding-left: 22px; position: relative; }
ul.points li::before { content: ""; position: absolute; left: 2px; top: .62em; width: 8px; height: 8px; border-radius: 2px; background: var(--mark-2); }
ul.points li.em::before { background: var(--emph); }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 18px; }
.card h4 { margin-bottom: 6px; }
.card p { font-size: 15.5px; color: var(--ink-2); }

/* Then / now */
.then-now { display: grid; grid-template-columns: minmax(0, 1fr) 30px minmax(0, 1fr); gap: 0; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.then-now > div { padding: 16px 18px; }
.then-now .lbl { font: 600 11px var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
.then-now .then { color: var(--ink-2); }
.then-now .arrow { display: flex; align-items: center; justify-content: center; color: var(--emph); font-weight: 700; padding: 0; }
.then-now .now .lbl { color: var(--emph-ink); }
.then-now ul { margin: 0; padding-left: 18px; font-size: 15.5px; display: flex; flex-direction: column; gap: 6px; }
@media (max-width: 640px) { .then-now { grid-template-columns: 1fr; } .then-now .arrow { padding: 4px; transform: rotate(90deg); } }

.quote { border-left: 0; margin: 28px 0; padding: 0; max-width: 62ch; }
.quote p { font-family: var(--f-display); font-size: 24px; line-height: 1.3; letter-spacing: -0.01em; }
.quote cite { display: block; margin-top: 8px; font-style: normal; font-size: 14px; color: var(--muted); }

.callout { display: grid; grid-template-columns: auto 1fr; gap: 14px; padding: 16px 18px; border-radius: var(--r); background: var(--surface-2); margin-top: 20px; }
.callout .tag { font: 600 11px/1.2 var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); background: var(--surface); padding: 6px 8px; border-radius: 6px; height: fit-content; white-space: nowrap; }
.callout.ex .tag { color: var(--emph-ink); }
.callout p, .callout li { font-size: 15.5px; }
.callout ul { margin: 6px 0 0; padding-left: 18px; }
@media (max-width: 520px) { .callout { grid-template-columns: 1fr; } }

.keep { margin-top: 22px; padding: 18px 20px; border: 1px solid var(--line-strong); border-radius: var(--r); }
.keep h4 { font: 600 12px var(--f-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }

/* ---------- Lab panels ---------- */
.lab { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); margin-top: 22px; overflow: hidden; }
.lab-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.lab-head .t { display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; }
.lab-head .t b { font-family: var(--f-display); font-size: 18px; }
.lab-head .t span { font: 500 11px var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--emph-ink); }
.lab-body { padding: 18px; }
.lab-foot { padding: 12px 18px; border-top: 1px solid var(--line); font-size: 14.5px; color: var(--ink-2); background: var(--surface-2); }
.lab-foot b { color: var(--ink); }

.seg { display: inline-flex; background: var(--surface-2); border-radius: 9px; padding: 3px; gap: 2px; flex-wrap: wrap; }
.seg button { border: 0; background: transparent; padding: 6px 12px; border-radius: 7px; font-size: 14px; cursor: pointer; color: var(--ink-2); }
.seg button:hover { color: var(--ink); }
.seg button[aria-pressed="true"] { background: var(--surface); color: var(--ink); box-shadow: 0 1px 2px rgba(0, 0, 0, .12); font-weight: 600; }
.btn { border: 1px solid var(--line-strong); background: var(--surface); padding: 8px 14px; border-radius: 8px; cursor: pointer; font-size: 14.5px; }
.btn:hover { border-color: var(--ink-2); }
.btn.primary { background: var(--ink); color: var(--surface); border-color: var(--ink); }
.btn.primary:hover { opacity: .9; }
.btn.emph { background: var(--emph); color: #fff; border-color: var(--emph); }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.muted { color: var(--muted); }
.small { font-size: 14px; }

svg.chart { display: block; width: 100%; height: auto; overflow: visible; }
svg.chart text { font-family: var(--f-body); fill: var(--muted); font-size: 11px; }
svg.chart .lbl-ink { fill: var(--ink); }
svg.chart .lbl-2 { fill: var(--ink-2); }
svg.chart .lbl-em { fill: var(--emph-ink); font-weight: 700; }
svg.chart .grid { stroke: var(--line); stroke-width: 1; }
svg.chart .axis { stroke: var(--line-strong); stroke-width: 1; }
.chart-wrap { position: relative; }
.tip {
  position: absolute; pointer-events: none; z-index: 5; background: var(--ink); color: var(--surface);
  font-size: 13px; padding: 6px 9px; border-radius: 6px; white-space: nowrap; transform: translate(-50%, calc(-100% - 10px));
  opacity: 0; transition: opacity .12s;
}
.tip.on { opacity: 1; }

/* Preattentive */
.digits { font: 500 clamp(15px, 2.4vw, 22px)/1.7 var(--f-mono); letter-spacing: .18em; word-break: break-all; color: var(--ink-2); padding: 14px; background: var(--surface-2); border-radius: 8px; user-select: none; }
.digits .hit { color: var(--emph); font-weight: 700; }
.pa-grid { aspect-ratio: 16 / 7; background: var(--surface-2); border-radius: 8px; }
.timer { font: 600 15px var(--f-mono); font-variant-numeric: tabular-nums; }

/* Cleveland */
.cm-stage { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 18px; align-items: center; }
@media (max-width: 680px) { .cm-stage { grid-template-columns: 1fr; } }
input[type="range"] { width: 100%; accent-color: var(--emph); }
.big-val { font: 700 34px var(--f-display); }

/* Decision tree */
.tree { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 0; }
@media (max-width: 860px) { .tree { grid-template-columns: 1fr; } }
.tree-q { padding: 22px; border-right: 1px solid var(--line); display: flex; flex-direction: column; gap: 14px; }
@media (max-width: 860px) { .tree-q { border-right: 0; border-bottom: 1px solid var(--line); } }
.crumbs { display: flex; flex-wrap: wrap; gap: 6px; }
.crumbs button { border: 1px solid var(--line); background: var(--surface-2); border-radius: 99px; padding: 3px 10px; font-size: 12.5px; cursor: pointer; color: var(--ink-2); }
.crumbs button:hover { border-color: var(--ink-2); }
.tree-q h4 { font-size: 22px; }
.tree-q .help { font-size: 14.5px; color: var(--muted); }
.opts { display: flex; flex-direction: column; gap: 8px; }
.opt {
  display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 10px; text-align: left;
  border: 1px solid var(--line); background: var(--surface); border-radius: 10px; padding: 12px 14px; cursor: pointer;
}
.opt:hover { border-color: var(--emph); background: var(--emph-wash); }
.opt b { display: block; font-size: 15.5px; }
.opt small { color: var(--muted); font-size: 13.5px; }
.opt .go { color: var(--emph); font-weight: 700; }
.tree-r { padding: 22px; display: flex; flex-direction: column; gap: 14px; background: var(--surface-2); }
.tree-r .empty { color: var(--muted); font-size: 15px; display: flex; flex-direction: column; gap: 12px; }
.res-title { font-size: 26px; }
.res-fig { background: var(--surface); border-radius: 10px; padding: 14px; border: 1px solid var(--line); }
.res-fig svg { max-width: 380px; margin: 0 auto; }
.res-meta { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { font: 500 12px var(--f-mono); padding: 4px 8px; border-radius: 6px; background: var(--surface); border: 1px solid var(--line); color: var(--ink-2); }
.chip.em { color: var(--emph-ink); border-color: transparent; background: var(--emph-wash); }
.dos { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; font-size: 14.5px; }
@media (max-width: 520px) { .dos { grid-template-columns: 1fr; } }
.dos h5 { font: 600 11px var(--f-mono); letter-spacing: .1em; text-transform: uppercase; margin: 0 0 6px; }
.dos .ok h5 { color: var(--good); }
.dos .ko h5 { color: var(--bad); }
.dos ul { margin: 0; padding-left: 16px; display: flex; flex-direction: column; gap: 4px; }
.alts { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; font-size: 14px; }
.alts button { border: 1px solid var(--line-strong); background: var(--surface); padding: 3px 10px; border-radius: 99px; cursor: pointer; font-size: 13px; }
.alts button:hover { border-color: var(--emph); }

/* Tree map overview */
.tree-map { overflow-x: auto; padding: 8px 18px 18px; }
.tree-map svg { min-width: 860px; }
.tree-map text { font-family: var(--f-body); }

/* Vocabulary gallery */
.vocab { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 860px) { .vocab { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .vocab { grid-template-columns: 1fr; } }
.fam { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 14px; display: flex; flex-direction: column; gap: 8px; }
.fam h4 { font-size: 17px; }
.fam p { font-size: 14px; color: var(--ink-2); }
.fam .thumbs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin-top: auto; }
.fam .thumb { border: 1px solid var(--line); border-radius: 8px; padding: 4px; background: var(--paper); cursor: pointer; display: flex; flex-direction: column; gap: 2px; text-align: left; }
.fam .thumb:hover { border-color: var(--emph); }
.fam .thumb span { font-size: 11px; color: var(--ink-2); line-height: 1.2; padding: 0 2px 2px; }

/* Tables */
.tbl-wrap { overflow-x: auto; }
table.demo { border-collapse: collapse; width: 100%; font-size: 14.5px; }
table.demo th, table.demo td { padding: 7px 10px; }
table.demo.bad { font-family: "Times New Roman", serif; }
table.demo.bad th, table.demo.bad td { border: 1px solid var(--ink-2); text-align: center; }
table.demo.bad th { background: var(--c1); color: #fff; }
table.demo.bad tr:nth-child(even) td { background: var(--seq1); }
table.demo.good th { text-align: left; font-weight: 600; color: var(--muted); font-size: 12.5px; text-transform: uppercase; letter-spacing: .06em; border-bottom: 1px solid var(--line-strong); }
table.demo.good th.r, table.demo.good td.r { text-align: right; }
table.demo.good td { border-bottom: 1px solid var(--line); font-variant-numeric: tabular-nums; }
table.demo.good tr.total td { font-weight: 700; border-top: 1px solid var(--ink-2); border-bottom: 0; }
table.demo.good .neg { color: var(--bad); }
table.demo.good .flag { color: var(--emph-ink); font-weight: 700; }
.spark { display: inline-block; vertical-align: middle; }

/* Checklists */
.check { display: flex; flex-direction: column; gap: 6px; }
.check label { display: grid; grid-template-columns: 22px 1fr; gap: 10px; align-items: start; padding: 9px 12px; border-radius: 8px; cursor: pointer; font-size: 15.5px; }
.check label:hover { background: var(--surface-2); }
.check input { width: 18px; height: 18px; margin-top: 3px; accent-color: var(--emph); }
.check label small { display: block; color: var(--muted); font-size: 13.5px; }
.score { display: flex; align-items: center; gap: 14px; }
.score .bar { flex: 1; height: 8px; background: var(--line); border-radius: 8px; overflow: hidden; }
.score .bar i { display: block; height: 100%; background: var(--emph); width: 0; transition: width .25s; }

/* Quiz */
.quiz-q { display: flex; flex-direction: column; gap: 12px; }
.quiz-q h4 { font-size: 20px; }
.quiz-opts { display: flex; flex-direction: column; gap: 8px; }
.quiz-opts button { text-align: left; border: 1px solid var(--line); background: var(--surface); border-radius: 10px; padding: 11px 14px; cursor: pointer; font-size: 15.5px; }
.quiz-opts button:hover:not([disabled]) { border-color: var(--ink-2); }
.quiz-opts button.right { border-color: var(--good); background: color-mix(in srgb, var(--good) 12%, var(--surface)); }
.quiz-opts button.wrong { border-color: var(--bad); background: color-mix(in srgb, var(--bad) 10%, var(--surface)); }
.quiz-opts button[disabled] { cursor: default; }
.quiz-expl { font-size: 15px; color: var(--ink-2); padding: 12px 14px; border-radius: 8px; background: var(--surface-2); }

/* Schedule */
.sched { display: grid; grid-template-columns: 70px 1fr auto; gap: 0; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.sched > div { padding: 11px 14px; border-bottom: 1px solid var(--line); font-size: 15px; }
.sched > div:nth-last-child(-n+3) { border-bottom: 0; }
.sched .h { font: 500 13px var(--f-mono); color: var(--muted); font-variant-numeric: tabular-nums; }
.sched .d { font: 500 12.5px var(--f-mono); color: var(--muted); text-align: right; white-space: nowrap; }
.sched .brk { color: var(--muted); font-style: italic; }
.sched a { color: var(--ink); text-decoration: none; font-weight: 600; }
.sched a:hover { color: var(--emph-ink); }
.sched .fmt { display: block; font-size: 13px; color: var(--muted); font-weight: 400; }

.refs { columns: 2 320px; column-gap: 32px; font-size: 14.5px; color: var(--ink-2); padding-left: 18px; }
.refs li { break-inside: avoid; margin-bottom: 8px; }
.refs .new { color: var(--emph-ink); font: 600 10.5px var(--f-mono); letter-spacing: .08em; margin-left: 4px; }

.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 13px; color: var(--ink-2); }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }
.note { font-size: 13.5px; color: var(--muted); }
.fade-in { animation: fade .25s ease-out; }
@keyframes fade { from { opacity: .4; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ================= Couche d'identité (Beyond Data) ================= */
body { font-size: 17.5px; }
body::before { background: var(--navy); }
h1, h2, h3, h4 { letter-spacing: -0.005em; }

/* Rail bleu nuit */
.rail { background: var(--navy); border-right: 0; color: #fff; }
.brand b { color: #fff; font-weight: 600; font-size: 24px; letter-spacing: -0.01em; }
.brand b i { font-style: normal; color: var(--cyan); }
.brand span, .rail-foot { color: #abacc2; }
.rail-label { color: #8182a4; font-family: var(--f-body); font-weight: 700; }
.agenda a { color: #d4d5e6; font-size: 15px; }
.agenda a .t { color: #8182a4; font-family: var(--f-body); font-weight: 600; }
.agenda a:hover { background: rgba(255, 255, 255, .07); color: #fff; }
.agenda a.active { background: rgba(78, 234, 255, .12); color: #fff; }
.agenda a.active .t { color: var(--cyan); }
.agenda .break a { color: #8182a4; }
.progress { background: rgba(255, 255, 255, .12); }
.progress i { background: linear-gradient(90deg, var(--mint), var(--cyan)); }
@media (max-width: 920px) { .rail { background: var(--navy); border-bottom: 0; } }

/* Hero : bandeau bleu nuit, arcs épais */
.hero {
  position: relative; overflow: hidden; isolation: isolate;
  margin-top: 28px; padding: 56px 48px; border-radius: 0 0 80px 0;
  background: linear-gradient(120deg, #4a4c7d 0%, #1b1e5c 38%, var(--navy) 70%);
  color: #fff;
}
.hero::before, .hero::after { content: ""; position: absolute; z-index: -1; border-radius: 50%; pointer-events: none; }
.hero::before { width: 360px; height: 360px; right: -120px; top: -170px; border: 64px solid var(--mint); }
.hero::after { width: 460px; height: 460px; right: -200px; bottom: -300px; border: 72px solid var(--violet); }
.hero .eyebrow { color: #abacc2; }
.hero .eyebrow .pill { background: rgba(78, 234, 255, .14); color: var(--cyan); }
.hero h1 { color: #fff; font-weight: 500; letter-spacing: -0.02em; }
.hero h1 em { color: var(--cyan); }
.hero .lead { color: #d4d5e6; }
.hero-meta b { color: #fff; font-weight: 600; }
.hero-meta span { color: #abacc2; }
.hero-fig { border: 0; border-radius: var(--r-card); box-shadow: 0 20px 50px rgba(0, 0, 0, .3); }
@media (max-width: 820px) { .hero { padding: 36px 22px; border-radius: 0 0 48px 0; } .hero::before { width: 220px; height: 220px; border-width: 40px; right: -90px; top: -110px; } }

/* Titres */
.mod-head h2 { font-weight: 500; letter-spacing: -0.02em; }
h3 { font-weight: 600; }
.eyebrow { font-family: var(--f-body); font-weight: 700; letter-spacing: .14em; }
.eyebrow .pill { background: var(--emph-wash); color: var(--emph-ink); }
.quote p { font-weight: 500; color: var(--ink); }
section.module { border-top: 0; position: relative; }
section.module::before { content: ""; position: absolute; top: 0; left: 0; width: 64px; height: 4px; border-radius: 4px; background: var(--mint); }

/* Cartes : grand coin supérieur gauche, ombre douce */
.card, .fam { border: 0; border-radius: var(--r-card); box-shadow: var(--shadow); padding: 22px; }
.card h4, .fam h4 { color: var(--ink); font-size: 19px; font-weight: 600; }
.card p, .fam p { color: var(--muted); }
.then-now { border: 0; border-radius: var(--r-card); box-shadow: var(--shadow); }
.then-now .lbl, .then-now .now .lbl { font-family: var(--f-body); font-weight: 700; }
.then-now .now { background: var(--emph-wash); }
.callout { border-radius: 24px 6px 6px 6px; background: var(--surface-2); }
.callout .tag { font-family: var(--f-body); font-weight: 700; border-radius: 99px; }
.keep { border: 0; background: var(--surface-2); border-radius: var(--r-card); }
.keep h4 { font-family: var(--f-body); font-weight: 700; color: var(--emph-ink); }
ul.points li::before { border-radius: 50%; background: var(--mark-2); }
ul.points li.em::before { background: var(--mint); box-shadow: 0 0 0 3px color-mix(in srgb, var(--mint) 25%, transparent); }

/* Labos */
.lab { border: 1px solid var(--line); border-radius: 20px; }
.lab-head .t span { font-family: var(--f-body); font-weight: 700; color: var(--emph-ink); }
.lab-head .t b { font-weight: 600; font-size: 19px; }
.lab-foot { background: var(--surface-2); color: var(--muted); }
.lab-foot b { color: var(--ink); }

/* Boutons en pilule, CTA cyan */
.btn { border-radius: 2.5rem; padding: 9px 18px; font-weight: 600; border-color: var(--line-strong); color: var(--ink); }
.btn:hover { border-color: var(--ink); }
.btn.primary { background: var(--cyan); color: var(--navy); border-color: var(--cyan); }
.btn.primary:hover { opacity: 1; background: #89f1ff; }
.btn[disabled] { opacity: .45; cursor: default; }
.seg { border-radius: 2.5rem; padding: 4px; }
.seg button { border-radius: 2.5rem; padding: 6px 14px; font-weight: 500; }
.seg button[aria-pressed="true"] { background: var(--navy); color: #fff; box-shadow: none; }
.opt { border-radius: 16px; }
.opt:hover { border-color: var(--emph); }
.crumbs button, .alts button, .chip { border-radius: 99px; font-family: var(--f-body); font-weight: 600; }
.chip.em { background: var(--emph-wash); color: var(--emph-ink); }
.tree-r { background: var(--surface-2); }
.res-fig { border: 0; border-radius: 28px 6px 6px 6px; box-shadow: var(--shadow); }
.fam .thumb { border-radius: 16px 4px 4px 4px; border-color: var(--line); background: var(--surface-2); }
.fam .thumb:hover { border-color: var(--emph); }
.dos h5 { font-family: var(--f-body); font-weight: 700; }

/* Programme */
.sched { border: 0; border-radius: var(--r-card); box-shadow: var(--shadow); }
.sched .h, .sched .d { font-family: var(--f-body); font-weight: 600; }
.sched a { color: var(--ink); }

/* Divers */
.digits { font-family: "IBM Plex Mono", ui-monospace, Consolas, monospace; border-radius: 16px; }
.timer { font-family: var(--f-body); font-weight: 700; }
.big-val { font-weight: 600; color: var(--ink); }
.score .bar i { background: linear-gradient(90deg, var(--mint), var(--cyan)); }
.check input, input[type="range"] { accent-color: var(--violet); }
.refs .new { font-family: var(--f-body); font-weight: 700; }
table.demo.good th { font-family: var(--f-body); font-weight: 700; }
.tip { background: var(--navy); color: #fff; border-radius: 8px; }
:root[data-theme="dark"] .tip { background: #fff; color: var(--navy); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .tip { background: #fff; color: var(--navy); } }
:root[data-theme="dark"] .seg button[aria-pressed="true"] { background: var(--cyan); color: var(--navy); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .seg button[aria-pressed="true"] { background: var(--cyan); color: var(--navy); } }