/* Section Tutoriels : même DA que la page d'accueil (noir et blanc, Inter, cartes blanches) */
:root {
  --ink: #17181b;
  --ink-2: #3f4248;
  --muted: #84878e;
  --faint: #c4c6cb;
  --line: #ebebee;
  --line-2: #f0f0f2;
  --bg: #f5f5f6;
  --panel: #ffffff;
  --soft: rgba(23, 24, 27, .04);
  --soft-2: rgba(23, 24, 27, .07);
  --green: #2f9e66;
  --amber: #b7791f;
  --shadow: 0 1px 2px rgba(17, 18, 22, .06), 0 0 0 1px rgba(17, 18, 22, .05);
  --shadow-lg: 0 24px 48px -16px rgba(17, 18, 22, .14), 0 0 0 1px rgba(17, 18, 22, .06);
  --r: 12px;
  --mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: Inter, system-ui, sans-serif; color: var(--ink); background: var(--bg); line-height: 1.6; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
img, svg, video { display: block; max-width: 100%; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 820px; }

/* ---------- boutons, pastilles ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; height: 44px; padding: 0 18px; border-radius: 10px; font: 500 15px/1 Inter, sans-serif; cursor: pointer; border: 0; transition: transform .15s ease, background .15s ease, box-shadow .15s ease; white-space: nowrap; }
.btn:active { transform: translateY(1px); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #2a2c31; }
.btn-light { background: var(--panel); color: var(--ink); box-shadow: var(--shadow); }
.btn-light:hover { background: #fafafa; }
.btn-sm { height: 36px; padding: 0 14px; font-size: 14px; border-radius: 9px; }
.pill { display: inline-flex; align-items: center; gap: 6px; height: 28px; padding: 0 11px; border-radius: 999px; background: var(--panel); box-shadow: var(--shadow); font-size: 13px; font-weight: 500; color: var(--ink-2); white-space: nowrap; }
.eyebrow { font-size: 13px; font-weight: 600; color: var(--muted); letter-spacing: .02em; }

/* ---------- nav (copie de la page d'accueil) ---------- */
.nav { position: sticky; top: 0; z-index: 20; background: rgba(245, 245, 246, .82); backdrop-filter: saturate(1.4) blur(12px); -webkit-backdrop-filter: saturate(1.4) blur(12px); border-bottom: 1px solid transparent; transition: border-color .2s; }
.nav.scrolled { border-color: var(--line); }
.nav .wrap { display: flex; align-items: center; height: 64px; gap: 32px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 17px; letter-spacing: -.02em; }
.logo-mark { width: 28px; height: 28px; border-radius: 8px; background: var(--ink); display: grid; place-items: center; flex-shrink: 0; }
.nav-links { display: flex; gap: 4px; margin-left: 8px; }
.nav-links a { padding: 7px 12px; border-radius: 9px; font-size: 14px; color: var(--ink-2); transition: background .15s; }
.nav-links a:hover, .nav-links a.on { background: var(--soft-2); color: var(--ink); }
.nav .btn { margin-left: auto; }

/* ---------- fil d'Ariane, en-tête ---------- */
.crumbs { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: 13px; color: var(--muted); padding-top: 28px; }
.crumbs a:hover { color: var(--ink); }
.crumbs span[aria-hidden] { color: var(--faint); }
.page-head { padding: 20px 0 28px; }
.page-head h1 { font-size: clamp(32px, 5vw, 52px); font-weight: 600; letter-spacing: -.04em; line-height: 1.08; margin-top: 10px; }
.page-head h1 span { color: var(--muted); }
.page-head .lead { font-size: 18px; color: var(--ink-2); max-width: 700px; margin-top: 16px; }
.meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }

/* ---------- lecteur vidéo ---------- */
.player { border-radius: 16px; overflow: hidden; background: var(--ink); box-shadow: var(--shadow-lg); aspect-ratio: 16 / 9; }
.player video { width: 100%; height: 100%; object-fit: contain; background: var(--ink); }
.player-note { font-size: 13px; color: var(--muted); margin-top: 10px; }
.chapters { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.chap { display: inline-flex; align-items: center; gap: 8px; min-height: 34px; padding: 6px 12px; border-radius: 9px; background: var(--panel); box-shadow: var(--shadow); font: 500 13.5px/1.3 Inter, sans-serif; color: var(--ink-2); border: 0; cursor: pointer; text-align: left; transition: background .15s, color .15s, box-shadow .15s; }
.chap b { font-family: var(--mono); font-weight: 500; font-size: 12.5px; color: var(--muted); }
.chap:hover { color: var(--ink); background: #fafafa; }
.chap.on { background: var(--ink); color: #fff; box-shadow: none; }
.chap.on b { color: rgba(255, 255, 255, .6); }

/* ---------- contenu ---------- */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 56px; align-items: start; padding: 48px 0 24px; }
.toc { position: sticky; top: 88px; font-size: 14px; }
.toc .eyebrow { display: block; margin-bottom: 10px; }
.toc a { display: block; padding: 6px 10px; border-radius: 8px; color: var(--ink-2); margin-left: -10px; }
.toc a:hover { background: var(--soft-2); color: var(--ink); }
.toc .dl { margin-top: 22px; padding: 16px; border-radius: var(--r); background: var(--panel); box-shadow: var(--shadow); }
.toc .dl p { color: var(--ink-2); font-size: 13.5px; margin-bottom: 12px; }
.toc .dl .btn { width: 100%; justify-content: center; height: 38px; font-size: 14px; }
.toc .dl .btn + .btn { margin-top: 8px; }

.prose { min-width: 0; }
.prose h2 { font-size: clamp(24px, 3vw, 30px); font-weight: 600; letter-spacing: -.03em; line-height: 1.2; margin: 48px 0 16px; scroll-margin-top: 84px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 18px; font-weight: 600; letter-spacing: -.015em; margin: 28px 0 10px; scroll-margin-top: 84px; }
.prose p { color: var(--ink-2); margin: 0 0 14px; font-size: 16px; }
.prose ul { margin: 0 0 16px 20px; color: var(--ink-2); }
.prose li { margin: 6px 0; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose a:not(.btn):not(.card-link) { text-decoration: underline; text-decoration-color: var(--faint); text-underline-offset: 3px; }
.prose a:not(.btn):not(.card-link):hover { text-decoration-color: var(--ink); }
.ui { display: inline-block; padding: 0 7px; border-radius: 6px; background: var(--panel); box-shadow: var(--shadow); font-weight: 500; font-size: .92em; color: var(--ink); white-space: nowrap; line-height: 1.6; }
.ui.dark { background: var(--ink); color: #fff; box-shadow: none; }
code, .code { font-family: var(--mono); font-size: .86em; background: var(--soft-2); padding: 1px 6px; border-radius: 5px; color: var(--ink); overflow-wrap: anywhere; }
kbd { font: 600 12.5px/1 Inter, sans-serif; color: var(--ink); background: var(--panel); border-radius: 6px; padding: 3px 7px; box-shadow: inset 0 0 0 1px var(--line), 0 2px 0 var(--line); white-space: nowrap; }

/* étapes numérotées */
.steps { list-style: none; margin: 8px 0 20px; padding: 0; counter-reset: st; display: grid; gap: 12px; }
.steps > li { counter-increment: st; position: relative; padding: 18px 20px 16px 64px; background: var(--panel); border-radius: var(--r); box-shadow: var(--shadow); margin: 0; }
.steps > li::before { content: counter(st); position: absolute; left: 18px; top: 17px; width: 30px; height: 30px; border-radius: 9px; background: var(--ink); color: #fff; font-weight: 600; font-size: 14px; display: grid; place-items: center; }
.steps > li > b:first-child { display: block; color: var(--ink); font-size: 16.5px; font-weight: 600; letter-spacing: -.01em; margin-bottom: 4px; }
.steps > li p { margin: 0 0 6px; font-size: 15px; }
.steps > li p:last-child { margin-bottom: 0; }
.steps .t { float: right; margin: -2px -4px 6px 12px; font-family: var(--mono); font-size: 12px; color: var(--muted); background: var(--soft-2); border-radius: 7px; padding: 4px 8px; border: 0; cursor: pointer; }
.steps .t:hover { background: var(--ink); color: #fff; }

/* encadrés */
.note-box { border-radius: var(--r); padding: 16px 18px; margin: 18px 0; background: var(--panel); box-shadow: var(--shadow); font-size: 15px; color: var(--ink-2); border-left: 3px solid var(--ink); }
.note-box.warn { border-left-color: var(--amber); }
.note-box.ok { border-left-color: var(--green); }
.note-box b:first-child { color: var(--ink); display: block; margin-bottom: 2px; }
.note-box p { margin: 0; font-size: 15px; }

/* tableaux */
.tbl-wrap { overflow-x: auto; margin: 10px 0 20px; border-radius: var(--r); box-shadow: var(--shadow); background: var(--panel); }
.tbl { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.tbl th { text-align: left; font-weight: 500; color: var(--muted); font-size: 13px; padding: 12px 16px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.tbl td { padding: 12px 16px; border-bottom: 1px solid var(--line-2); color: var(--ink-2); vertical-align: top; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl td:first-child { color: var(--ink); }

/* bloc de code copiable */
.copy-block { position: relative; margin: 10px 0 18px; }
.copy-block pre { font-family: var(--mono); font-size: 13.5px; line-height: 1.7; background: var(--ink); color: #e9e9ec; border-radius: var(--r); padding: 16px 18px; overflow-x: auto; white-space: pre; }
.copy-btn { position: absolute; top: 10px; right: 10px; height: 28px; padding: 0 10px; border-radius: 7px; border: 0; background: rgba(255, 255, 255, .12); color: #fff; font: 500 12.5px Inter, sans-serif; cursor: pointer; }
.copy-btn:hover { background: rgba(255, 255, 255, .22); }

/* FAQ */
.faq details { background: var(--panel); border-radius: var(--r); box-shadow: var(--shadow); margin-bottom: 10px; }
.faq summary { cursor: pointer; list-style: none; padding: 16px 20px; font-weight: 500; color: var(--ink); display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--muted); font-size: 20px; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding: 0 20px 16px; margin: 0; color: var(--ink-2); font-size: 15px; }

/* précédent / suivant */
.pn { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 48px 0 12px; }
.pn a { display: block; padding: 16px 18px; border-radius: var(--r); background: var(--panel); box-shadow: var(--shadow); transition: box-shadow .15s, transform .15s; }
.pn a:hover { box-shadow: var(--shadow-lg); transform: translateY(-1px); }
.pn small { display: block; color: var(--muted); font-size: 13px; }
.pn b { font-weight: 600; letter-spacing: -.01em; }
.pn .next { text-align: right; grid-column: 2; }

/* ---------- sommaire ---------- */
.hero-t { padding: 56px 0 28px; text-align: center; }
.hero-t h1 { font-size: clamp(36px, 6vw, 60px); font-weight: 600; letter-spacing: -.045em; line-height: 1.05; }
.hero-t h1 span { color: var(--muted); }
.hero-t .lead { font-size: 18px; color: var(--ink-2); max-width: 640px; margin: 18px auto 0; }
.hero-t .meta { justify-content: center; }
.grid-t { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; padding: 24px 0 40px; }
.tcard { display: flex; flex-direction: column; background: var(--panel); border-radius: 14px; box-shadow: var(--shadow); overflow: hidden; transition: box-shadow .2s, transform .2s; }
.tcard:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.tcard .thumb { position: relative; aspect-ratio: 16 / 9; background: var(--ink); }
.tcard .thumb img { width: 100%; height: 100%; object-fit: cover; }
.tcard .dur { position: absolute; right: 10px; bottom: 10px; font: 500 12px var(--mono); color: #fff; background: rgba(23, 24, 27, .8); border-radius: 6px; padding: 3px 7px; }
.tcard .play { position: absolute; left: 12px; bottom: 10px; width: 34px; height: 34px; border-radius: 50%; background: #fff; display: grid; place-items: center; box-shadow: 0 6px 16px -6px rgba(0, 0, 0, .5); }
.tcard .body { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.tcard .num { font-size: 12.5px; font-weight: 600; color: var(--muted); letter-spacing: .04em; }
.tcard h2 { font-size: 18px; font-weight: 600; letter-spacing: -.02em; line-height: 1.3; }
.tcard p { font-size: 14.5px; color: var(--ink-2); }
.parcours { display: grid; gap: 10px; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-bottom: 8px; }
.parcours div { background: var(--panel); border-radius: var(--r); box-shadow: var(--shadow); padding: 16px 18px; }
.parcours b { display: block; font-weight: 600; margin-bottom: 4px; }
.parcours p { font-size: 14px; color: var(--ink-2); }
.sec-t { padding: 16px 0; }
.sec-t h2 { font-size: clamp(24px, 3vw, 30px); font-weight: 600; letter-spacing: -.03em; }

/* ---------- appel final, footer ---------- */
.cta-t { margin: 40px 0 72px; padding: 36px; border-radius: 18px; background: var(--ink); color: #fff; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.cta-t h2 { font-size: 26px; font-weight: 600; letter-spacing: -.03em; line-height: 1.2; }
.cta-t p { color: #b9bbc1; margin-top: 6px; }
.cta-t .btns { display: flex; gap: 10px; flex-wrap: wrap; }
.cta-t .btn-dark { background: #fff; color: var(--ink); }
.cta-t .btn-dark:hover { background: #ececee; }
footer { padding: 40px 0 56px; border-top: 1px solid var(--line); }
footer .wrap { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
footer p { font-size: 13px; color: var(--muted); }
footer nav { display: flex; gap: 18px; margin-left: auto; font-size: 13px; color: var(--ink-2); flex-wrap: wrap; }
footer nav a:hover { color: var(--ink); }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .tcard, .pn a, .btn { transition: none; } }
@media (max-width: 960px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .toc { position: static; display: none; }
  .grid-t { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .parcours { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .wrap { padding: 0 16px; }
  .nav-links { display: none; }
  .nav .wrap { gap: 12px; }
  .grid-t { grid-template-columns: 1fr; }
  .page-head .lead, .hero-t .lead { font-size: 16.5px; }
  .player { border-radius: 12px; }
  .steps > li { padding: 16px 16px 14px 56px; }
  .steps > li::before { left: 14px; }
  .pn { grid-template-columns: 1fr; }
  .pn .next { grid-column: 1; }
  .cta-t { padding: 26px 22px; margin-bottom: 56px; }
  .cta-t .btns, .cta-t .btn { width: 100%; justify-content: center; }
  footer nav { margin-left: 0; }
}