/* Batch Code IA — feuille de style unique. Polices hébergées localement (Poppins, Inter). */

@font-face { font-family: "Poppins"; font-weight: 600; font-style: normal; font-display: swap; src: url("../fonts/poppins-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "Poppins"; font-weight: 700; font-style: normal; font-display: swap; src: url("../fonts/poppins-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: "Poppins"; font-weight: 800; font-style: normal; font-display: swap; src: url("../fonts/poppins-latin-800-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 400; font-style: normal; font-display: swap; src: url("../fonts/inter-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 500; font-style: normal; font-display: swap; src: url("../fonts/inter-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 600; font-style: normal; font-display: swap; src: url("../fonts/inter-latin-600-normal.woff2") format("woff2"); }

:root {
  color-scheme: dark;
  --bg: #050918;
  --surface: #0c1536;
  --surface-2: #101c46;
  --ink: #eef2ff;
  --muted: #9aa7d0;
  --line: rgba(125, 155, 255, .16);
  --line-strong: rgba(125, 155, 255, .34);
  --accent: #2d7bff;
  --accent-ink: #ffffff;
  --link: #7db0ff;
  --accent-soft: rgba(45, 123, 255, .14);
  --green: #35d07f;
  --cyan: #38d6c9;
  --violet: #8a6bff;
  --warm: #8a6bff;
  --good: #35d07f;
  --bad: #ff7b72;
  --star: #f5b942;
  --radius: 14px;
  --shadow: 0 24px 48px -28px rgba(0, 0, 0, .75), inset 0 1px 0 rgba(255, 255, 255, .04);
  --display: "Poppins", system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: var(--display);
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }
body { margin: 0; color: var(--ink); font: 400 16px/1.6 var(--sans); background: var(--bg); min-height: 100vh; -webkit-font-smoothing: antialiased; }
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(900px 480px at 82% -60px, rgba(45, 123, 255, .22), transparent 70%),
    radial-gradient(700px 420px at 4% 90px, rgba(53, 208, 127, .10), transparent 70%),
    radial-gradient(600px 400px at 60% 100%, rgba(138, 107, 255, .10), transparent 70%);
}
body::after {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: .5;
  background-image: linear-gradient(rgba(125, 155, 255, .05) 1px, transparent 1px), linear-gradient(90deg, rgba(125, 155, 255, .05) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000, transparent 75%);
}
/* Fond animé : colonnes de code qui défilent (rempli par static/js/code-rain.js). */
.code-rain {
  position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; user-select: none;
  display: flex; justify-content: space-around; opacity: .16;
  -webkit-mask-image: linear-gradient(transparent, #000 15%, #000 85%, transparent);
  mask-image: linear-gradient(transparent, #000 15%, #000 85%, transparent);
}
.code-rain-col { flex: 0 0 280px; overflow: hidden; }
.code-rain-track { animation: code-rain-up 80s linear infinite; will-change: transform; }
.code-rain-col.down .code-rain-track { animation-name: code-rain-down; }
.code-rain pre { margin: 0 0 48px; font: 12.5px/1.6 ui-monospace, "Cascadia Code", Consolas, monospace; color: #9aa7d0; white-space: pre; }
.code-rain .k { color: #c792ea; }
.code-rain .s { color: #35d07f; }
.code-rain .c { color: #5c6a99; font-style: italic; }
.code-rain .t { color: #7db0ff; }
.code-rain .n { color: #f5b942; }
.code-rain .lang-css .t, .code-rain .lang-css .n { color: #38d6c9; }
@keyframes code-rain-up { from { transform: translateY(0); } to { transform: translateY(-50%); } }
@keyframes code-rain-down { from { transform: translateY(-50%); } to { transform: translateY(0); } }
[data-theme=light] .code-rain { opacity: .14; }
[data-theme=light] .code-rain pre { color: #4a5680; }
[data-theme=light] .code-rain .k { color: #7c3aed; }
[data-theme=light] .code-rain .s { color: #15985a; }
[data-theme=light] .code-rain .t { color: #2563eb; }
[data-theme=light] .code-rain .n { color: #b7791f; }
@media (max-width: 720px) { .code-rain { opacity: .1; } }

a { color: var(--link); text-underline-offset: 3px; }
img, iframe, video { max-width: 100%; }
h1, h2, h3 { font-family: var(--display); line-height: 1.12; margin: 0 0 .5em; font-weight: 700; letter-spacing: -.02em; }
h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); font-weight: 800; letter-spacing: -.03em; }
h2 { font-size: clamp(1.45rem, 2.6vw, 1.9rem); }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
.muted { color: var(--muted); }
.small { font-size: .88rem; }
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 560px; }
main.container { padding-top: 32px; padding-bottom: 80px; }

/* ------------------------------------------------------------- en-tête */
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(5, 9, 24, .78); backdrop-filter: blur(14px) saturate(140%); -webkit-backdrop-filter: blur(14px) saturate(140%); border-bottom: 1px solid var(--line); }
.site-header .bar { display: flex; align-items: center; gap: 24px; min-height: 76px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-family: var(--display); font-size: 1.12rem; font-weight: 700; color: var(--ink); text-decoration: none; line-height: 1.05; letter-spacing: -.01em; }
.brand img { height: 44px; width: auto; display: block; }
.brand .logo-img { height: 60px; border-radius: 8px; } /* image fournie (fond bleu nuit intégré) */
.brand .name { display: inline-block; }
.brand .name b { color: var(--accent); font-weight: 700; }
.brand .ia { display: inline-block; margin-left: 5px; padding: 1px 7px; border-radius: 6px; background: rgba(53, 208, 127, .16); color: var(--green); font-size: .82em; font-weight: 700; }
.nav { display: flex; align-items: center; gap: 4px 6px; flex-wrap: wrap; margin-left: auto; font-size: .95rem; font-weight: 500; }
.nav a, .nav button.link { position: relative; color: var(--ink); text-decoration: none; padding: 8px 12px; border-radius: 8px; font: inherit; background: none; border: 0; cursor: pointer; opacity: .88; transition: opacity .15s, background .15s; }
.nav a:hover, .nav button.link:hover { opacity: 1; background: rgba(125, 155, 255, .1); }
.nav a[aria-current=page] { opacity: 1; color: #fff; }
.nav a[aria-current=page]::after { content: ""; position: absolute; left: 12px; right: 12px; bottom: 2px; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--accent), var(--green)); }
.badge { display: inline-block; min-width: 20px; padding: 0 6px; border-radius: 999px; background: var(--violet); color: #fff; font-size: .72rem; font-weight: 700; text-align: center; line-height: 20px; }
.inline { display: inline; margin: 0; }
.nav a.btn-login { margin-left: 8px; padding: 9px 20px; border-radius: 10px; opacity: 1; color: #fff; font-weight: 600; background: linear-gradient(180deg, #3b8bff, #2563eb); box-shadow: 0 8px 22px -8px rgba(45, 123, 255, .8), inset 0 1px 0 rgba(255, 255, 255, .25); }
.nav a.btn-login:hover { filter: brightness(1.1); background: linear-gradient(180deg, #3b8bff, #2563eb); }
.account { position: relative; }
.account summary { list-style: none; cursor: pointer; padding: 8px 12px; border-radius: 8px; }
.account summary::-webkit-details-marker { display: none; }
.account summary::after { content: ""; display: inline-block; margin-left: 8px; width: 7px; height: 7px; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: translateY(-3px) rotate(45deg); }
.account summary:hover { background: rgba(125, 155, 255, .1); }
.account .menu { position: absolute; right: 0; top: calc(100% + 8px); min-width: 240px; background: var(--surface-2); border: 1px solid var(--line-strong); border-radius: var(--radius); box-shadow: 0 24px 48px -16px rgba(0, 0, 0, .8); padding: 8px; display: grid; z-index: 30; }
.account .menu a, .account .menu button.link { display: block; width: 100%; text-align: left; padding: 9px 12px; border-radius: 8px; opacity: 1; }
.account .menu a:hover, .account .menu button.link:hover { background: var(--accent-soft); }

/* --------------------------------------------------------------- messages */
.messages { list-style: none; padding: 0; margin: 0 0 24px; display: grid; gap: 8px; }
.messages li { padding: 12px 16px; border-radius: 12px; border: 1px solid var(--line); background: var(--surface); }
.messages .success { border-color: rgba(53, 208, 127, .6); }
.messages .error { border-color: rgba(255, 123, 114, .6); }

/* ---------------------------------------------------- boutons, formulaires */
.btn { display: inline-block; padding: 10px 20px; border-radius: 10px; border: 1px solid rgba(255, 255, 255, .14); color: #fff; font: 600 .95rem var(--sans); text-decoration: none; cursor: pointer; background: linear-gradient(180deg, #3b8bff, #2563eb); box-shadow: 0 10px 24px -10px rgba(45, 123, 255, .85), inset 0 1px 0 rgba(255, 255, 255, .25); transition: transform .15s, filter .15s, box-shadow .15s; }
.btn:hover { transform: translateY(-1px); filter: brightness(1.08); }
.btn:active { transform: translateY(0); }
.btn.large { padding: 14px 28px; font-size: 1rem; border-radius: 12px; }
.btn.small { padding: 6px 12px; font-size: .85rem; border-radius: 8px; }
.btn.secondary { background: rgba(255, 255, 255, .04); color: var(--ink); border-color: var(--line-strong); box-shadow: none; }
.btn.secondary:hover { background: rgba(125, 155, 255, .12); border-color: var(--link); }
.btn.danger { background: transparent; border-color: rgba(255, 123, 114, .6); color: var(--bad); box-shadow: none; }
.btn.warm, .btn.green { background: linear-gradient(180deg, #46dc8f, #27b96a); color: #04210f; border-color: rgba(255, 255, 255, .2); box-shadow: 0 10px 24px -10px rgba(53, 208, 127, .85), inset 0 1px 0 rgba(255, 255, 255, .35); }
.btn:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible { outline: 3px solid var(--cyan); outline-offset: 2px; }
form p, .field { margin: 0 0 16px; }
label { display: block; font-weight: 600; margin-bottom: 6px; font-size: .9rem; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=url], input[type=search], select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line-strong); border-radius: 10px; background: rgba(5, 9, 24, .6); color: var(--ink); font: inherit;
}
input::placeholder, textarea::placeholder { color: #6672a0; }
input[type=checkbox], input[type=radio] { margin-right: 8px; accent-color: var(--accent); }
.errorlist { color: var(--bad); list-style: none; padding: 0; margin: 4px 0; font-size: .9rem; }
.helptext { color: var(--muted); font-size: .85rem; display: block; margin-top: 4px; }

/* ----------------------------------------------------------------- cartes */
.card { background: linear-gradient(180deg, rgba(22, 36, 88, .72), rgba(11, 19, 52, .78)); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.grid { display: grid; gap: 22px; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); }
.course-card { display: flex; flex-direction: column; gap: 10px; text-decoration: none; color: inherit; transition: transform .25s ease, border-color .25s, box-shadow .25s; }
.course-card:hover { transform: perspective(900px) rotateX(3deg) rotateY(-3deg) translateY(-6px); border-color: rgba(125, 176, 255, .5); box-shadow: 0 30px 50px -24px rgba(45, 123, 255, .55), inset 0 1px 0 rgba(255, 255, 255, .06); }
.course-card h3 { margin: 0; font-size: 1.08rem; }
.course-card .cover { position: relative; overflow: hidden; height: 200px; border-radius: 10px; margin: -4px -4px 4px; padding: 10px 12px; display: flex; align-items: flex-end; color: #fff; font-size: .8rem; font-weight: 600;
  background: radial-gradient(120px 80px at 85% 15%, rgba(255, 255, 255, .28), transparent 70%), linear-gradient(135deg, #1347c9, #2d7bff 50%, #26b86a); }
.course-card .cover::after { content: "</>"; position: absolute; right: 12px; top: 8px; font: 800 1.7rem var(--display); color: rgba(255, 255, 255, .22); letter-spacing: -.04em; }
/* -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
/* Image fournie par le professeur : remplit la zone, voile sombre en bas pour garder la catégorie lisible. */
/* -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/

.cover.has-image { background: var(--surface-2); }
.cover.has-image img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.cover.has-image::before { content: ""; position: absolute; inset: 0; background: linear-gradient(transparent 45%, rgba(5, 9, 24, .75)); }
.cover.has-image::after { display: none; }
.cover > span { position: relative; text-shadow: 0 1px 3px rgba(0, 0, 0, .5); }
.buy-card .cover.has-image { position: relative; height: 170px; }
.cover-preview img { display: block; width: 100%; max-width: 320px; height: auto; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 10px; border: 1px solid var(--line); margin-bottom: 12px; }
/* Présence des professeurs (page administrateur). */
.presence { display: inline-flex; align-items: center; gap: 6px; font-size: .82rem; color: var(--muted); white-space: nowrap; }
.presence::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; opacity: .5; }
.presence.on { color: var(--green); font-weight: 600; }
.presence.on::before { opacity: 1; box-shadow: 0 0 0 3px rgba(53, 208, 127, .25); }
.course-card .meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 0; font-size: .86rem; color: var(--muted); }
.price { font-family: var(--display); font-weight: 700; font-size: 1.15rem; }
.price.free { color: var(--green); }
.tag { display: inline-block; padding: 2px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--link); font-size: .78rem; font-weight: 600; }
.stars { color: var(--star); letter-spacing: 1px; }
.stats { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); margin-bottom: 28px; }
.stat { background: linear-gradient(180deg, rgba(22, 36, 88, .72), rgba(11, 19, 52, .78)); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.stat b { display: block; font: 800 1.8rem var(--display); letter-spacing: -.03em; }
.stat span { color: var(--muted); font-size: .85rem; }

/* --------------------------------------------------------------- tableaux */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; background: rgba(12, 21, 54, .7); }
th, td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td, tr:last-child th { border-bottom: 0; }
th { font-size: .78rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); background: rgba(125, 155, 255, .06); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

/* ------------------------------------------------------------ progression */
.progress { height: 8px; background: rgba(125, 155, 255, .14); border-radius: 999px; overflow: hidden; }
.progress > i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--green)); border-radius: 999px; }
.bars { display: flex; align-items: flex-end; gap: 5px; height: 130px; padding-top: 8px; }
.bars div { flex: 1; background: linear-gradient(180deg, var(--link), var(--accent)); border-radius: 4px 4px 0 0; min-height: 3px; }

/* ------------------------------------------------------------ mise en page */
.split { display: grid; gap: 32px; grid-template-columns: 1fr 340px; align-items: start; }
.lesson-layout { display: grid; gap: 26px; grid-template-columns: 290px 1fr; align-items: start; }
@media (max-width: 880px) { .split, .lesson-layout { grid-template-columns: 1fr; } }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.stack > * + * { margin-top: 16px; }
.outline { list-style: none; padding: 0; margin: 0; }
.outline li { padding: 8px 0; border-bottom: 1px solid var(--line); font-size: .93rem; }
.outline .done::before { content: "✓ "; color: var(--good); font-weight: 700; }
.outline .locked { color: var(--muted); }
.outline .current a { font-weight: 700; color: #fff; }
.lesson-body { background: linear-gradient(180deg, rgba(22, 36, 88, .6), rgba(11, 19, 52, .7)); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.lesson-body .text { max-width: 68ch; font-size: 1.05rem; line-height: 1.7; }
.video { position: relative; padding-top: 56.25%; margin-bottom: 16px; }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; border-radius: 10px; }
.choice { display: block; padding: 12px 14px; border: 1px solid var(--line-strong); border-radius: 10px; margin-bottom: 8px; font-weight: 400; cursor: pointer; background: rgba(5, 9, 24, .35); }
.choice:hover { border-color: var(--link); background: var(--accent-soft); }
.ok { color: var(--good); font-weight: 600; }
.ko { color: var(--bad); font-weight: 600; }
.assistant { border-top: 1px dashed var(--line-strong); margin-top: 24px; padding-top: 18px; }
.assistant .answer { white-space: pre-wrap; background: var(--accent-soft); border: 1px solid var(--line); padding: 14px; border-radius: 10px; margin-top: 10px; }
.assistant .answer:empty { display: none; }
.notice { padding: 14px 16px; border-radius: 12px; background: var(--accent-soft); border: 1px solid var(--line); }
.hero { padding: 24px 0 20px; }
.hero p { max-width: 60ch; font-size: 1.1rem; color: var(--muted); }
.filters { display: grid; gap: 12px; grid-template-columns: 2fr 1fr 1fr 1fr auto; align-items: end; margin-bottom: 26px; padding: 18px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(12, 21, 54, .55); }
.filters label { margin-bottom: 6px; }
@media (max-width: 760px) { .filters { grid-template-columns: 1fr 1fr; } }
.pager { display: flex; gap: 14px; justify-content: center; align-items: center; margin-top: 28px; }
.ai-text { white-space: pre-wrap; }
.page-head { padding: 12px 0 8px; max-width: 68ch; }
.page-head p { color: var(--muted); font-size: 1.08rem; }

/* ------------------------------------------------------------ page d'accueil */
.home-hero { display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr); gap: 8px; align-items: center; padding: 20px 0 0; min-height: min(76vh, 700px); }
.home-hero h1 { font-size: clamp(2.5rem, 5.4vw, 4.3rem); line-height: 1.02; letter-spacing: -.04em; margin-bottom: 22px; }
.home-hero h1 .hl { background: linear-gradient(90deg, #3ddc8e, #8ff0b9); -webkit-background-clip: text; background-clip: text; color: transparent; }
.home-hero .lead { color: var(--muted); font-size: 1.14rem; max-width: 48ch; margin-bottom: 32px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.stage { position: relative; aspect-ratio: 1.12 / 1; margin-right: -32px; }
.stage .fallback { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; transition: opacity .6s ease; }
.stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; opacity: 0; transition: opacity .35s ease; }
.stage.is-3d canvas { opacity: 1; }
/* Avec WebGL, l'image plate ne s'affiche jamais avant la 3D ; elle revient seulement si la 3D échoue (.no-3d). */
.webgl .stage .fallback, .stage.is-3d .fallback { opacity: 0; }
.webgl .stage.no-3d .fallback { opacity: 1; }
@media (max-width: 900px) { .home-hero { grid-template-columns: 1fr; min-height: 0; } .stage { order: -1; margin: 0 -12px; max-width: 620px; } }
.section { margin-top: 104px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 26px; }
.why { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 56px; align-items: start; }
.why .intro p { color: var(--muted); font-size: 1.08rem; max-width: 40ch; }
.features { display: grid; gap: 18px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 900px) { .why { grid-template-columns: 1fr; gap: 28px; } }
@media (max-width: 560px) { .features { grid-template-columns: 1fr; } }
.feature { position: relative; padding: 22px; border-radius: var(--radius); border: 1px solid var(--line); background: linear-gradient(180deg, rgba(22, 36, 88, .6), rgba(11, 19, 52, .7)); box-shadow: var(--shadow); }
.feature .icon { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 16px; color: var(--link); background: var(--accent-soft); border: 1px solid rgba(125, 176, 255, .35); }
.feature:nth-child(2) .icon { color: var(--green); background: rgba(53, 208, 127, .12); border-color: rgba(53, 208, 127, .4); }
.feature:nth-child(3) .icon { color: #b6a4ff; background: rgba(138, 107, 255, .14); border-color: rgba(138, 107, 255, .45); }
.feature:nth-child(4) .icon { color: var(--cyan); background: rgba(56, 214, 201, .12); border-color: rgba(56, 214, 201, .4); }
.feature .icon svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.feature h3 { font-size: 1.04rem; margin-bottom: 6px; }
.feature p { color: var(--muted); font-size: .94rem; margin: 0; }

.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; counter-reset: step; list-style: none; padding: 0; margin: 0; }
.step { position: relative; counter-increment: step; }
.step::before { content: counter(step); display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; margin-bottom: 18px; font: 700 1.1rem var(--display); color: #fff; background: linear-gradient(135deg, #2d7bff, #26b86a); box-shadow: 0 10px 24px -10px rgba(45, 123, 255, .9); }
.step:not(:last-child)::after { content: ""; position: absolute; top: 22px; left: 60px; right: -20px; height: 2px; background: linear-gradient(90deg, rgba(125, 176, 255, .5), rgba(125, 176, 255, 0)); }
.step h3 { margin-bottom: 6px; }
.step p { color: var(--muted); margin: 0; max-width: 34ch; }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; } .step::after { display: none; } }

.cta-band { margin-top: 112px; padding: 44px 40px; border-radius: 22px; border: 1px solid var(--line-strong); display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  background: radial-gradient(500px 220px at 90% 0%, rgba(53, 208, 127, .22), transparent 70%), radial-gradient(520px 260px at 0% 100%, rgba(45, 123, 255, .3), transparent 70%), linear-gradient(135deg, rgba(20, 34, 90, .9), rgba(12, 20, 58, .9)); }
.cta-band h2 { margin: 0 0 6px; font-size: clamp(1.5rem, 3vw, 2.1rem); }
.cta-band p { margin: 0; color: var(--muted); }

/* ------------------------------------------------------------ pied de page */
.footer { margin-top: 24px; border-top: 1px solid var(--line); background: rgba(5, 9, 24, .6); color: var(--muted); font-size: .92rem; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; padding: 48px 24px 28px; }
.footer .brand { margin-bottom: 14px; }
.footer p { max-width: 38ch; margin: 0; }
.footer h4 { margin: 0 0 12px; font: 600 .95rem var(--display); color: var(--ink); }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer a { color: var(--muted); text-decoration: none; }
.footer a:hover { color: #fff; text-decoration: underline; }
.footer-bottom { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 18px 24px 28px; border-top: 1px solid var(--line); font-size: .85rem; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } }

/* -------------------------------------------------- certificat et impression */
.certificate { text-align: center; padding: 56px 24px; border: 6px double var(--accent); background: var(--surface); border-radius: 8px; }
.certificate h1 { font-size: 2.4rem; }
.certificate .who { font: 800 2rem var(--display); margin: 18px 0; }
@media (max-width: 760px) {
  .container { padding: 0 16px; }
  .site-header .bar { padding-top: 8px; padding-bottom: 8px; gap: 8px; }
  .nav { margin-left: 0; width: 100%; gap: 0 2px; font-size: .9rem; }
  .nav a, .account summary { padding: 7px 9px; }
  .account .menu { left: 0; right: auto; }
  .section { margin-top: 72px; }
  .cta-band { padding: 30px 22px; margin-top: 80px; }
}
@media print {
  .site-header, .footer, .no-print, .messages { display: none !important; }
  body { background: #fff !important; color: #000; }
  body::before, body::after, .code-rain { display: none; }
  .card, .certificate, .lesson-body, table { background: #fff !important; color: #000; box-shadow: none; }
  .muted, th { color: #444; }
  .certificate { border-color: #1450d6; }
}

/* ===================================================== finitions v2 */
.btn.block { display: block; width: 100%; text-align: center; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=url], input[type=search], select { min-height: 46px; }
input:focus, select:focus, textarea:focus { border-color: var(--link); box-shadow: 0 0 0 3px rgba(45, 123, 255, .25); outline: none; }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.checks li { position: relative; padding-left: 28px; color: var(--muted); }
.checks li::before { content: ""; position: absolute; left: 0; top: .28em; width: 18px; height: 18px; border-radius: 50%; background: rgba(53, 208, 127, .16) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2335d07f' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 12.5 10 16.5 18 8'/%3E%3C/svg%3E") center / 12px no-repeat; }

/* connexion / inscription */
.auth { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 0; max-width: 940px; margin: 24px auto 0; border: 1px solid var(--line-strong); border-radius: 22px; overflow: hidden; box-shadow: 0 40px 80px -40px rgba(0, 0, 0, .9); }
.auth-side { padding: 44px 36px; display: flex; flex-direction: column; gap: 18px; justify-content: center;
  background: radial-gradient(420px 260px at 20% 0%, rgba(45, 123, 255, .45), transparent 70%), radial-gradient(360px 260px at 100% 100%, rgba(53, 208, 127, .22), transparent 70%), #0b1536; }
.auth-side h2 { margin: 0; font-size: 1.7rem; }
.auth-side p { color: var(--muted); margin: 0; }
.auth-card { padding: 44px 40px; background: rgba(8, 14, 38, .92); }
.auth-card h1 { font-size: 1.9rem; margin-bottom: 22px; }
.auth-card form p:last-of-type { margin-bottom: 20px; }
@media (max-width: 760px) { .auth { grid-template-columns: 1fr; } .auth-side { padding: 28px 24px; } .auth-card { padding: 28px 24px; } }

/* page de cours */
.course-hero { padding: 8px 0 4px; }
.course-hero h1 { font-size: clamp(2rem, 4.2vw, 3rem); margin: 12px 0 10px; }
.course-hero .lead { color: var(--muted); font-size: 1.15rem; max-width: 56ch; }
.facts { list-style: none; padding: 0; margin: 14px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.facts li { padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line); background: rgba(12, 21, 54, .6); font-size: .88rem; color: var(--muted); }
.facts strong { color: var(--ink); }
.buy-card { position: sticky; top: 96px; overflow: hidden; }
.buy-card .cover { height: 120px; margin: -22px -22px 6px; padding: 14px 18px; display: flex; align-items: flex-end; font-weight: 600; font-size: .85rem; color: #fff;
  background: radial-gradient(160px 100px at 85% 10%, rgba(255, 255, 255, .3), transparent 70%), linear-gradient(135deg, #1347c9, #2d7bff 50%, #26b86a); }
.buy-card .cover::after { content: "</>"; margin-left: auto; font: 800 2.2rem var(--display); color: rgba(255, 255, 255, .28); letter-spacing: -.04em; align-self: flex-start; }
.price.big { font-size: 2rem; }
.outline li a { text-decoration: none; }
.outline li a:hover { text-decoration: underline; }

/* assistant IA sur l'accueil */
.ai-showcase { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; align-items: center; padding: 44px; border-radius: 24px; border: 1px solid var(--line-strong);
  background: radial-gradient(500px 300px at 100% 0%, rgba(138, 107, 255, .22), transparent 70%), radial-gradient(400px 260px at 0% 100%, rgba(45, 123, 255, .2), transparent 70%), rgba(10, 17, 44, .75); }
.ai-showcase h2 { margin-bottom: 14px; }
.ai-showcase p.muted { max-width: 46ch; margin-bottom: 20px; }
.chat { display: grid; gap: 12px; }
.bubble { max-width: 88%; padding: 12px 16px; border-radius: 16px; font-size: .95rem; line-height: 1.5; }
.bubble code { font: 500 .88em ui-monospace, SFMono-Regular, Menlo, monospace; padding: 1px 6px; border-radius: 5px; background: rgba(255, 255, 255, .1); }
.bubble.me { justify-self: end; background: linear-gradient(180deg, #3b8bff, #2563eb); border-bottom-right-radius: 4px; }
.bubble.ia { justify-self: start; display: grid; gap: 4px; background: rgba(22, 36, 88, .9); border: 1px solid var(--line-strong); border-bottom-left-radius: 4px; }
.bubble.ia b { color: var(--green); font: 700 .8rem var(--display); }
@media (max-width: 860px) { .ai-showcase { grid-template-columns: 1fr; gap: 28px; padding: 28px 22px; } }

/* entrée d'accueil : un seul mouvement orchestré */
@media (prefers-reduced-motion: no-preference) {
  .home-hero > div:first-child { animation: rise .7s cubic-bezier(.2, .7, .2, 1) both; }
  @keyframes rise { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
}
.buy-card .checks { margin-top: 20px; }
.card h3 a { color: var(--ink); text-decoration: none; }
.card h3 a:hover { color: var(--link); text-decoration: underline; }
.row.between > h1 { margin-bottom: 0; }
.row.between { margin-bottom: 22px; }
.lesson-layout > aside { position: sticky; top: 96px; }
.choice:has(input:checked) { border-color: var(--link); background: var(--accent-soft); }
.stats + h2, .stats + section { margin-top: 8px; }

/* ===================================================== éditeur de code */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.codelab { margin: 22px 0; border: 1px solid var(--line-strong); border-radius: var(--radius); overflow: hidden; background: #0a1030; box-shadow: var(--shadow); }
.codelab-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 10px 14px; background: rgba(22, 36, 88, .7); border-bottom: 1px solid var(--line); }
.codelab-lang { margin: 0; font: 600 .85rem var(--display); color: var(--link); }
.codelab-lang select { min-height: 34px; padding: 4px 10px; width: auto; }
.codelab-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.codelab-editor .cm-editor { max-height: 460px; font-size: .92rem; }
.codelab-editor .cm-editor.cm-focused { outline: 2px solid var(--cyan); outline-offset: -2px; }
.codelab-editor .cm-scroller { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; min-height: 180px; }
.codelab-out { margin: 0; padding: 14px 16px; min-height: 84px; max-height: 260px; overflow: auto; border-top: 1px solid var(--line); background: #060a1d; color: #d7def7; font: .9rem/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; white-space: pre-wrap; word-break: break-word; }
.codelab-out:empty::before { content: "Le résultat s'affichera ici."; color: var(--muted); }
.codelab-out.has-error { color: #ffb3ad; }
.codelab-status { margin: 0; padding: 8px 16px; font-size: .88rem; color: var(--muted); border-top: 1px solid var(--line); min-height: 38px; }
.codelab-status[data-kind=ok] { color: var(--good); font-weight: 600; }
.codelab-status[data-kind=error] { color: var(--bad); }
.codelab-status[data-kind=warn] { color: var(--star); }
.codelab-hint { margin: 0; padding: 0 16px 12px; font-size: .8rem; color: var(--muted); }
.codelab-preview { display: block; width: 100%; height: 340px; border: 0; border-top: 1px solid var(--line); background: #fff; resize: vertical; }
.codelab[data-mode=preview] .codelab-out { display: none; }
.codelab[data-mode=run] .codelab-preview { display: none; }
.codelab-context { border-top: 1px solid var(--line); background: rgba(12, 21, 54, .6); }
.codelab-context summary { cursor: pointer; padding: 10px 16px; font-size: .88rem; font-weight: 600; color: var(--link); }
.codelab-context pre { margin: 0; padding: 4px 16px 14px; max-height: 200px; overflow: auto; font: .85rem/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: #c9d3f5; white-space: pre-wrap; }
[hidden] { display: none !important; }

/* ===================================================== pages légales, FAQ, infolettre, témoins */
.legal { max-width: 74ch; }
.legal h2 { font-size: 1.25rem; margin-top: 28px; }
.legal p, .legal li { color: #c9d3f5; }
.legal ul, .legal ol { padding-left: 22px; }
.legal .notice { margin: 8px 0 20px; }
.faq { display: grid; gap: 10px; max-width: 78ch; }
.faq details { border: 1px solid var(--line); border-radius: 12px; background: rgba(12, 21, 54, .6); padding: 0 18px; }
.faq summary { cursor: pointer; padding: 14px 0; font-weight: 600; }
.faq details[open] summary { color: var(--link); }
.faq p { margin: 0 0 16px; color: var(--muted); }
.contact-form input[name=website] { position: absolute; left: -9999px; }
.contact-form p:has(input[name=website]) { position: absolute; left: -9999px; height: 0; overflow: hidden; }
.newsletter { display: flex; gap: 8px; margin-top: 16px; max-width: 360px; }
.newsletter input { min-height: 38px; }
.newsletter-note { margin-top: 8px; }
.footer-grid { grid-template-columns: 1.6fr 1fr 1fr 1fr; }
@media (max-width: 860px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }
.cookie-banner { position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 50; max-width: 720px; margin: 0 auto; display: flex; align-items: center; gap: 16px; padding: 14px 18px; border-radius: 14px; border: 1px solid var(--line-strong); background: rgba(12, 21, 54, .96); box-shadow: 0 20px 50px -20px #000; }
.cookie-banner p { margin: 0; font-size: .9rem; color: var(--muted); }
@media (max-width: 560px) { .cookie-banner { flex-direction: column; align-items: stretch; } }

/* Lot 2 : parcours, code promo */
.path-steps{margin:0;padding-left:20px;display:grid;gap:14px}
.path-steps .progress{margin:6px 0 2px}
.promo input{margin-top:8px;width:100%;text-transform:uppercase}
.promo summary{cursor:pointer;color:var(--muted,#9fb0cc)}

/* Lot 3 : badges */
.badges{list-style:none;margin:0 0 28px;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:12px}
.badge-card{display:grid;gap:4px;padding:14px;border:1px dashed rgba(159,176,204,.35);border-radius:12px;opacity:.6}
.badge-card.earned{opacity:1;border-style:solid;border-color:#34d399}

/* Lot 4 : sécurité */
.totp-secret{display:inline-block;margin:8px 0;padding:10px 14px;font-size:1.15rem;letter-spacing:.08em;background:rgba(59,130,246,.12);border-radius:8px;user-select:all}
.verify-banner{margin-bottom:16px}
.promo{margin-bottom:10px}
.lesson-body > p.no-print{margin-top:18px}

.teacher-pick{border:1px solid rgba(159,176,204,.25);border-radius:12px;padding:10px 12px;margin:0 0 10px}
.teacher-pick legend{padding:0 6px;color:#9fb0cc}
.teacher-pick .choice{display:flex;gap:8px;align-items:flex-start;margin:6px 0}

/* ===================================================== mode clair / mode sombre */
.theme-toggle { font-size: 1.1rem !important; line-height: 1; }
.theme-toggle .icon-moon { display: none; }
[data-theme=light] .theme-toggle .icon-sun { display: none; }
[data-theme=light] .theme-toggle .icon-moon { display: inline; }

[data-theme=light] {
  color-scheme: light;
  --bg: #f5f7fc;
  --surface: #ffffff;
  --surface-2: #ffffff;
  --ink: #0f1733;
  --muted: #56608a;
  --line: rgba(30, 50, 120, .12);
  --line-strong: rgba(30, 50, 120, .24);
  --accent: #2563eb;
  --link: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, .08);
  --green: #15985a;
  --cyan: #0e8f86;
  --violet: #6d4fe0;
  --good: #15803d;
  --bad: #c62828;
  --star: #b7791f;
  --shadow: 0 18px 40px -28px rgba(15, 23, 51, .35);
}
[data-theme=light] body::before { opacity: .45; }
[data-theme=light] body::after { opacity: .25; }
[data-theme=light] .site-header { background: rgba(255, 255, 255, .85); }
[data-theme=light] .nav a[aria-current=page],
[data-theme=light] .outline .current a,
[data-theme=light] .footer a:hover { color: var(--ink); }
[data-theme=light] .nav a:hover, [data-theme=light] .nav button.link:hover, [data-theme=light] .account summary:hover { background: var(--accent-soft); }
[data-theme=light] .account .menu { box-shadow: 0 24px 48px -20px rgba(15, 23, 51, .3); }
[data-theme=light] .card, [data-theme=light] .stat, [data-theme=light] .lesson-body, [data-theme=light] .feature,
[data-theme=light] .bubble.ia, [data-theme=light] .auth-card, [data-theme=light] .cookie-banner { background: var(--surface); }
[data-theme=light] table { background: var(--surface); }
[data-theme=light] th { background: rgba(30, 50, 120, .04); }
[data-theme=light] input[type=text], [data-theme=light] input[type=email], [data-theme=light] input[type=password],
[data-theme=light] input[type=number], [data-theme=light] input[type=url], [data-theme=light] input[type=search],
[data-theme=light] select, [data-theme=light] textarea, [data-theme=light] .choice { background: #fff; }
[data-theme=light] input::placeholder, [data-theme=light] textarea::placeholder { color: #8a93b5; }
[data-theme=light] .btn.secondary { background: #fff; }
[data-theme=light] .btn.secondary:hover { background: var(--accent-soft); }
[data-theme=light] .filters, [data-theme=light] .facts li, [data-theme=light] .faq details { background: rgba(255, 255, 255, .8); }
[data-theme=light] .footer { background: rgba(255, 255, 255, .7); }
[data-theme=light] .legal p, [data-theme=light] .legal li { color: var(--ink); }
[data-theme=light] .home-hero h1 .hl { background-image: linear-gradient(90deg, #12a35d, #0e8f86); }
[data-theme=light] .bubble code { background: rgba(30, 50, 120, .08); }
[data-theme=light] .cta-band { background: radial-gradient(500px 220px at 90% 0%, rgba(53, 208, 127, .18), transparent 70%), radial-gradient(520px 260px at 0% 100%, rgba(45, 123, 255, .16), transparent 70%), #fff; }
[data-theme=light] .ai-showcase { background: radial-gradient(500px 300px at 100% 0%, rgba(138, 107, 255, .14), transparent 70%), radial-gradient(400px 260px at 0% 100%, rgba(45, 123, 255, .12), transparent 70%), #fff; }
[data-theme=light] .auth { box-shadow: 0 40px 80px -40px rgba(15, 23, 51, .35); }
[data-theme=light] .auth-side { background: radial-gradient(420px 260px at 20% 0%, rgba(45, 123, 255, .22), transparent 70%), radial-gradient(360px 260px at 100% 100%, rgba(53, 208, 127, .16), transparent 70%), #eef2fb; }
[data-theme=light] .codelab-context { background: rgba(255, 255, 255, .03); }
/* L'éditeur de code reste sombre dans les deux modes : on lui rend ses couleurs d'origine. */
[data-theme=light] .codelab {
  color-scheme: dark; color: #eef2ff;
  --ink: #eef2ff; --muted: #9aa7d0; --link: #7db0ff; --line: rgba(125, 155, 255, .16); --line-strong: rgba(125, 155, 255, .34);
  --good: #35d07f; --bad: #ff7b72; --star: #f5b942; --cyan: #38d6c9;
}
[data-theme=light] .codelab .btn.secondary { background: rgba(255, 255, 255, .04); }
[data-theme=light] .codelab select { background: rgba(5, 9, 24, .6); }