/* Badges Credly · étude de cas, V2 « Mise en scène ». Habillage portfolio commun (Geist, monochrome, grille 12 colonnes).
   Idée propre au projet : une seule scène 3D fixe derrière la page ; les chapitres sont des fenêtres de texte qui défilent devant elle. */
@font-face{font-family:"Geist";font-weight:400;font-display:swap;src:url(fonts/geist-sans-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"Geist";font-weight:500;font-display:swap;src:url(fonts/geist-sans-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"Geist";font-weight:600;font-display:swap;src:url(fonts/geist-sans-latin-600-normal.woff2) format("woff2")}
@font-face{font-family:"Geist Mono";font-weight:400;font-display:swap;src:url(fonts/geist-mono-latin-400-normal.woff2) format("woff2")}
:root{
  color-scheme:dark;
  --stage:#0a0b0c; --ink:#ebebe8; --muted:#9a9da3; --line:rgba(235,235,232,.14);
  --sans:"Geist",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"Geist Mono",ui-monospace,"SF Mono",Menlo,monospace;
  --ease:cubic-bezier(.22,1,.36,1);
  --frame:1920px;
  --gutter:max(20px, env(safe-area-inset-left, 0px), calc((100vw - var(--frame)) / 2 + 20px));
  --gutter-r:max(20px, env(safe-area-inset-right, 0px), calc((100vw - var(--frame)) / 2 + 20px));
  --side:min(36vw,560px);
}
@media (min-width:861px){:root{--gutter:max(48px, calc((100vw - var(--frame)) / 2 + 48px));--gutter-r:max(64px, calc((100vw - var(--frame)) / 2 + 64px))}}
*{box-sizing:border-box;margin:0;padding:0}
html{background:var(--stage)}
html.lenis,html.lenis body{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto!important}
body{position:relative;background:var(--stage);color:var(--ink);font-family:var(--sans);font-size:clamp(16px, 10px + .45vw, 20px);line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:clip}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;text-align:inherit}
:focus-visible{outline:2px solid currentColor;outline-offset:4px;border-radius:2px}
.wrap{padding-left:var(--gutter);padding-right:var(--gutter-r)}
.mono{font-family:var(--mono);font-size:clamp(12px, 9px + .22vw, 14px);letter-spacing:.01em;line-height:1.45}
.muted-d{color:var(--muted)}
.line{display:block;overflow:hidden;padding-bottom:.08em;margin-bottom:-.08em}
.line>span{display:block}
figure{margin:0}
figcaption{margin-top:14px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

.top{position:fixed;inset:0 0 auto;z-index:50;display:flex;justify-content:space-between;align-items:center;
  padding:calc(18px + env(safe-area-inset-top,0px)) var(--gutter-r) 18px var(--gutter);color:#fff;mix-blend-mode:difference;pointer-events:none;transition:transform .5s cubic-bezier(.23,1,.32,1)}
.cs-on .top{transform:translateY(-110%)}
.top a{pointer-events:auto;text-decoration:none}
.top .name{font-weight:500;font-size:15px;letter-spacing:-.01em}
.top nav{display:flex;gap:28px;font-size:14px}

/* ---------- La scène ---------- */
.gl{position:fixed;inset:0;width:100vw;height:100vh;height:100lvh;display:block;z-index:0;pointer-events:none;background:var(--stage)}
main{position:relative;z-index:1}
.tags{position:fixed;inset:0;z-index:2;pointer-events:none}
.tag{position:absolute;left:0;top:0;display:flex;align-items:center;gap:10px;white-space:nowrap;font-family:var(--mono);font-size:12px;letter-spacing:.01em;color:rgba(235,235,232,.86);opacity:0;will-change:transform,opacity}
.tag i{display:block;width:28px;height:1px;background:rgba(235,235,232,.4)}
.tag b{font-weight:400;display:inline-grid;place-items:center;min-width:20px;height:20px;border:1px solid rgba(235,235,232,.45);font-size:11px}
.tag.l{flex-direction:row-reverse}
.tag.t,.tag.b{flex-direction:column;align-items:center;gap:6px}.tag.t i,.tag.b i{width:1px;height:22px}.tag.t i{order:2}
.tag.t span,.tag.b span{display:flex;gap:8px;align-items:center}
.tag.c{flex-direction:column;align-items:flex-start;gap:2px}.tag.c i{display:none}.tag.c em{display:block}
.tag em{font-style:normal;color:var(--muted)}
.fb{display:none}
.no-gl .gl,.no-gl .tags{display:none}
.no-gl .fb{display:block;padding:0 var(--gutter-r) 64px var(--gutter)}
.no-gl .fb img{width:100%;max-width:1400px;margin-left:auto}
.no-gl .fb-hero{position:relative;padding:0}

/* ---------- Ouverture (structure commune aux études de cas) ---------- */
.hero{position:relative;height:100vh;height:100svh;min-height:640px;color:#fff;overflow:hidden}
.hero-title{position:absolute;left:var(--gutter);top:46%;transform:translateY(-50%);max-width:min(40vw,600px);z-index:4}
.hero-title .kick{color:rgba(255,255,255,.56);margin:0 0 22px}
.hero-title h1{font-size:clamp(64px,8.6vw,150px);font-weight:500;letter-spacing:-.05em;line-height:.88;padding-bottom:.04em;margin:0 0 0 -.03em}
.hero-title .desc{margin:28px 0 0;font-size:clamp(17px,1.45vw,22px);line-height:1.38;color:rgba(255,255,255,.74);letter-spacing:-.01em}
.hero-meta{position:absolute;left:var(--gutter);right:calc(var(--gutter-r) + 180px);bottom:calc(28px + env(safe-area-inset-bottom,0px));display:grid;grid-template-columns:.5fr .6fr 1fr 1.4fr;gap:24px;margin:0;color:rgba(255,255,255,.86);z-index:4}
.hero-meta dt{color:rgba(255,255,255,.5);margin-bottom:4px}
.hero-meta dd{margin:0;font-size:15px;line-height:1.35}
.hero-cue{position:absolute;right:var(--gutter-r);bottom:calc(28px + env(safe-area-inset-bottom,0px));display:flex;align-items:center;gap:12px;color:rgba(255,255,255,.56);z-index:4}
.hero-cue i{position:relative;display:block;width:1px;height:28px;background:rgba(255,255,255,.18);overflow:hidden}
.hero-cue i::after{content:"";position:absolute;left:0;top:0;width:1px;height:12px;background:#fff;animation:cue 2.2s cubic-bezier(.65,0,.35,1) infinite}
/* Invitation à poursuivre : le même trait que l'ouverture, seulement après un arrêt au milieu d'une séquence */
.scroll-cue{position:fixed;right:var(--gutter-r);bottom:calc(28px + env(safe-area-inset-bottom,0px));z-index:5;opacity:0;transition:opacity .6s ease;pointer-events:none}
.scroll-cue.on{opacity:1}
.scroll-cue i{position:relative;display:block;width:1px;height:40px;background:rgba(255,255,255,.18);overflow:hidden}
.scroll-cue i::after{content:"";position:absolute;left:0;top:0;width:1px;height:14px;background:#fff;animation:cue2 2.2s cubic-bezier(.65,0,.35,1) infinite}
@keyframes cue2{0%{transform:translateY(-14px)}100%{transform:translateY(40px)}}
@media (prefers-reduced-motion:reduce){.scroll-cue i::after{animation:none;top:13px}}
.no-gl .scroll-cue{display:none}
@keyframes cue{0%{transform:translateY(-12px)}100%{transform:translateY(28px)}}
.no-gl .hero{height:auto;padding-bottom:120px}
/* Image d'attente : visible dès le premier affichage, puis relayée en fondu par la scène 3D (même cadrage) */
.hero-poster{position:absolute;z-index:1;pointer-events:none;transform-origin:44% 56%;animation:posterIn 1.4s cubic-bezier(.16,1,.3,1) both;transition:opacity .8s ease .05s}
.hero-poster img{width:100%;height:100%;display:block;-webkit-mask-image:radial-gradient(closest-side,#000 80%,transparent);mask-image:radial-gradient(closest-side,#000 80%,transparent)}
@keyframes posterIn{from{opacity:0;transform:scale(.97) translateY(1.2%)}to{opacity:1;transform:none}}
.gl-ready .hero-poster{opacity:0;visibility:hidden;transition:opacity .8s ease .05s,visibility 0s .9s}
.no-gl .hero-poster{display:none}
/* Textes de l'ouverture : animés en CSS dès l'affichage, sans attendre les scripts */
.hero .line>span{animation:lineUp 1.1s cubic-bezier(.16,1,.3,1) both}
.hero .kick>span{animation-delay:.15s}.hero h1 .line:nth-child(1)>span{animation-delay:.22s}.hero h1 .line:nth-child(2)>span{animation-delay:.28s}
.hero .desc .line>span{animation-delay:.4s}.hero-meta .line>span{animation-delay:.55s}
@keyframes lineUp{from{transform:translateY(110%)}to{transform:none}}
@media (prefers-reduced-motion:reduce){.hero-poster,.hero .line>span{animation:none}}
.no-gl .hero-title{position:relative;top:auto;transform:none;padding:140px 0 40px}

/* ---------- Chapitres : une fenêtre de texte collante, la scène fait le reste ---------- */
.ch{position:relative;height:var(--len,400vh)}
#marche{--len:400vh}#anatomie{--len:330vh}#rncp{--len:420vh}#explorations{--len:470vh}#fin{--len:340vh}
.stick{position:sticky;top:0;height:100vh;height:100svh;display:flex;flex-direction:column;justify-content:center;padding:96px var(--gutter-r) 40px var(--gutter)}
.side{width:var(--side);position:relative}
.chap{margin-bottom:clamp(24px,3vw,44px)}
.chap-n{display:flex;align-items:center;gap:10px;color:var(--muted);margin-bottom:18px}
.chap-n i{display:block;width:10px;height:10px;background:currentColor}
.chap h2{font-size:clamp(36px,4.2vw,72px);line-height:.98;font-weight:500;letter-spacing:-.04em;text-wrap:balance}
.lede{font-size:clamp(18px,1.35vw,23px);line-height:1.4;letter-spacing:-.012em;max-width:28em}
.side p+p{margin-top:1em}
.phases{position:relative;display:grid}
.ph{grid-area:1/1}
.no-gl .ch{height:auto}.no-gl .stick{position:relative;height:auto;padding-top:140px;padding-bottom:40px}
.no-gl .ph+.ph{margin-top:1.5em}.no-gl .phases{display:block}

/* La marche : lecture du niveau courant et échelle cliquable */
.read{margin-top:clamp(24px,3vw,40px);padding-top:20px;border-top:1px solid var(--line);max-width:30em}
.read-k{display:flex;gap:16px;align-items:baseline;color:#fff}
.read-k span+span{color:var(--muted)}
.read-q{margin-top:10px;font-size:15px;line-height:1.5;color:rgba(235,235,232,.78);min-height:6em;transition:opacity .35s var(--ease)}
.read-q.out{opacity:0}
.read-src{margin-top:10px;font-size:12px}
.scale{position:absolute;left:var(--gutter);right:var(--gutter-r);bottom:calc(28px + env(safe-area-inset-bottom,0px));display:grid;grid-template-columns:repeat(14,minmax(0,1fr));gap:4px;align-items:end}
.scale button{position:relative;display:flex;flex-direction:column;justify-content:flex-end;gap:8px;min-height:44px;padding-top:8px;color:var(--muted);font-size:12px;transition:color .3s}
.scale button::before{content:"";display:block;height:2px;background:rgba(235,235,232,.16);transition:background .4s var(--ease)}
.scale button.on{color:#fff}
.scale button.on::before{background:#fff}
.scale button.past::before{background:rgba(235,235,232,.5)}
.scale button.gold.on::before{background:#e7c46a}
.scale button:hover{color:#fff}
.no-gl .scale{position:relative;left:auto;right:auto;bottom:auto;margin-top:32px}

/* Anatomie : la liste sert aussi d'étiquettes, accrochées aux calques par le script */
.layers{list-style:none;margin-top:clamp(24px,3vw,40px);display:grid;gap:12px;max-width:30em}
.layers li{display:flex;gap:14px;align-items:baseline;color:var(--muted);transition:color .4s}
.layers li b{font-weight:400;display:inline-grid;place-items:center;min-width:22px;height:22px;border:1px solid currentColor;font-size:11px;flex:none}
.layers li strong{display:block;font-weight:400;color:#fff;font-family:var(--sans);font-size:15px;letter-spacing:-.005em}
.layers li.on{color:#fff}

/* ---------- 05 · En situation ---------- */
.sit{position:relative;background:var(--stage);padding:clamp(120px,12vw,200px) 0 clamp(80px,9vw,140px)}
.sit-in{display:grid;grid-template-columns:var(--side) 1fr;gap:clamp(24px,4vw,80px);align-items:center;padding:0 var(--gutter-r) 0 var(--gutter)}
.sit-ph{justify-self:center;width:min(100%,460px,40svh)}
.sit-ph{will-change:transform}
.sit-img img{width:100%}

/* ---------- Fin : le système ---------- */
.side-wall{align-self:flex-start;margin-top:4vh}
.wall-cap{margin-top:16px;max-width:30em}
.hot{position:absolute;inset:0;pointer-events:none}
.hot button{position:absolute;left:0;top:0;border-radius:50%;pointer-events:auto;opacity:0}
.hot button:focus-visible{opacity:1;outline:1px solid rgba(255,255,255,.8);outline-offset:0}
.hot.off button{pointer-events:none}
.wall-read{position:absolute;left:var(--gutter);bottom:calc(32px + env(safe-area-inset-bottom,0px));color:#fff;min-height:1.5em;opacity:0;transition:opacity .3s}
.wall-read.on{opacity:1}
.end{position:relative;background:var(--stage);padding-top:clamp(100px,12vw,180px);padding-bottom:clamp(60px,8vw,120px);border-top:1px solid var(--line)}
.end-t{font-size:clamp(36px,4.6vw,80px);line-height:1;font-weight:500;letter-spacing:-.04em;max-width:16ch}
.credits{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;margin-top:56px}
.credits dt{color:var(--muted);margin-bottom:6px}
.credits dd{margin:0;color:#fff}
.next{display:flex;justify-content:space-between;align-items:baseline;margin-top:clamp(80px,10vw,160px);padding-top:24px;border-top:1px solid var(--line)}
.next a{display:flex;gap:16px;align-items:baseline;text-decoration:none;font-size:clamp(28px,3.4vw,56px);font-weight:500;letter-spacing:-.03em}
.next .u{background:linear-gradient(currentColor,currentColor) 0 100%/0 1px no-repeat;transition:background-size .5s var(--ease)}
.next a:hover .u,.next a:focus-visible .u{background-size:100% 1px}

/* ---------- Écrans étroits : la scène occupe le haut, le texte le bas ---------- */
@media (max-width:860px){
  :root{--side:100%}
  .hero-title{left:var(--gutter);right:var(--gutter-r);top:auto;bottom:calc(150px + env(safe-area-inset-bottom,0px));transform:none;max-width:none}
  .hero-title .kick{margin-bottom:12px}
  .hero-title h1{font-size:clamp(56px,17vw,96px)}
  .hero-title .desc{margin-top:14px;font-size:16px}
  .hero-meta{right:var(--gutter-r);grid-template-columns:1fr 1fr;gap:10px 16px}
  .hero-meta div:nth-child(n+3){display:none}
  .hero-meta dd{font-size:14px}
  .hero-cue{display:none}
  .stick{justify-content:flex-end;padding:0 var(--gutter-r) calc(24px + env(safe-area-inset-bottom,0px)) var(--gutter)}
  .stick::before{content:"";position:absolute;inset:auto 0 0;height:62%;background:linear-gradient(to top,rgba(10,11,12,.94) 55%,rgba(10,11,12,0));pointer-events:none}
  .ch-wall .stick::before{height:40%;background:linear-gradient(to top,rgba(10,11,12,.94) 60%,rgba(10,11,12,0))}
  .side{z-index:1}
  .chap{margin-bottom:14px}.chap-n{margin-bottom:10px}
  .chap h2{font-size:clamp(30px,8.6vw,44px)}
  .lede{font-size:16px}
  .side p+p{margin-top:.6em}
  #marche .lede,#anatomie .lede{display:none}
  .read{margin-top:12px;padding-top:12px}
  .read-q{font-size:13px;min-height:7.6em}
  .read-src{display:none}
  #marche .stick{padding-bottom:calc(84px + env(safe-area-inset-bottom,0px))}
  .scale{gap:2px}.scale button{font-size:10px}
  .layers{gap:6px;margin-top:12px}.layers li span{font-size:12px}.layers li strong{font-size:14px}
  .sit-in{grid-template-columns:1fr}
  .sit-ph{width:min(76%,380px,40svh)}
  .credits{grid-template-columns:1fr 1fr}
  .tag.t span,.tag.b span{font-size:0;gap:0}.tag.t b,.tag.b b{font-size:11px}.tag.c{display:none}
  .wall-read{bottom:calc(20px + env(safe-area-inset-bottom,0px))}
}
@media (prefers-reduced-motion:reduce){.hero-cue i::after{animation:none}}