:root{
  --bg:#fbfbfd;
  --bg-2:#f5f5f7;
  --text:#1d1d1f;
  --muted:#6e6e73;
  --line:#d2d2d7;
  --teal:#1f9e96;
  --teal-d:#137a74;
  --teal-l:#5fc4bd;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI Variable Display","Segoe UI","Inter Tight",sans-serif;
  --ease:cubic-bezier(.22,1,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:400 17px/1.5 var(--font);letter-spacing:-.01em;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,p{margin:0}
.wrap{width:min(1080px,100% - 44px);margin-inline:auto}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:16px;z-index:99;background:var(--text);color:#fff;padding:8px 12px;border-radius:8px}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px;border-radius:6px}

/* Nav verre dépoli */
.nav{position:fixed;inset:0 0 auto;z-index:50;background:rgba(251,251,253,.72);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid transparent;transition:border-color .3s}
.nav.is-stuck{border-color:rgba(0,0,0,.08)}
.nav__in{width:min(1080px,100% - 44px);margin-inline:auto;height:56px;display:flex;align-items:center;justify-content:space-between}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:16px;white-space:nowrap}
.brand img{border-radius:8px}

/* Boutons */
.btn{display:inline-flex;align-items:center;justify-content:center;height:46px;padding:0 24px;border-radius:999px;background:var(--teal);color:#fff;font-weight:500;font-size:17px;white-space:nowrap;transition:background .2s,transform .2s var(--ease)}
.btn:hover{background:var(--teal-d)}
.btn:active{transform:scale(.97)}
.btn--sm{height:34px;padding:0 16px;font-size:14px}
.btn--lg{height:54px;padding:0 32px;font-size:18px}
.lien{color:var(--teal-d);font-size:17px;font-weight:500;white-space:nowrap}
.lien span{display:inline-block;transition:transform .2s var(--ease)}
.lien:hover{text-decoration:underline}
.lien:hover span{transform:translateX(3px)}

/* Hero : école sous la neige */
.hero{position:relative;min-height:100svh;display:flex;align-items:flex-end;overflow:hidden;isolation:isolate;color:#fff}
.hero__bg{position:absolute;inset:0;z-index:-2}
.hero__bg video{width:100%;height:100%;object-fit:cover}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;background:
  linear-gradient(180deg,rgba(20,40,70,.25) 0%,rgba(20,40,70,.05) 35%,rgba(12,28,52,.55) 100%),
  linear-gradient(90deg,rgba(12,28,52,.55),transparent 60%)}
.snow{position:absolute;inset:0;width:100%;height:100%;z-index:-1;pointer-events:none}
.hero__in{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;padding:120px 0 72px}
.hero h1{font-weight:800;font-size:clamp(64px,11vw,150px);line-height:.88;letter-spacing:-.05em;text-shadow:0 10px 40px rgba(10,25,50,.35)}
.slogan{margin:22px 0 34px;font-size:clamp(20px,2.4vw,28px);font-weight:500;letter-spacing:-.02em;opacity:.92}
.hero .btn{background:#fff;color:#12304f}
.hero .btn:hover{background:#e8f3ff}

/* Carte verre « en direct » */
.carte{flex:0 0 260px;padding:22px 24px;border-radius:24px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.35);backdrop-filter:blur(22px) saturate(160%);-webkit-backdrop-filter:blur(22px) saturate(160%);box-shadow:0 30px 60px -30px rgba(10,25,50,.6)}
.carte__t{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.02em;opacity:.9}
.carte__l{display:flex;align-items:baseline;justify-content:space-between;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.22)}
.carte__l span{font-size:34px;font-weight:700;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.carte__l small{font-size:14px;opacity:.85}
.carte__rang{margin-top:14px;font-size:14px;font-weight:600}
.vert{width:9px;height:9px;border-radius:50%;background:#3ddc7a;box-shadow:0 0 0 0 rgba(61,220,122,.55);animation:pouls-v 2.2s infinite}

/* Vitrine façon Apple */
.vitrine{padding:20px 0 120px;text-align:center}
.vitrine h2{font-weight:700;font-size:clamp(38px,6vw,76px);line-height:1.02;letter-spacing:-.04em}
.grad{background:linear-gradient(90deg,var(--teal-d),var(--teal-l));-webkit-background-clip:text;background-clip:text;color:transparent}
.ecran{margin:56px auto 0;border-radius:28px;overflow:hidden;background:#000;aspect-ratio:16/9;box-shadow:0 40px 80px -40px rgba(0,0,0,.45);transform:scale(var(--k,.88));transition:transform .1s linear}
.ecran video{width:100%;height:100%;object-fit:cover}

/* Final sombre */
.final{background:#000;color:#f5f5f7;padding:clamp(100px,14vw,170px) 0;text-align:center}
.final__in{display:flex;flex-direction:column;align-items:center}
.final img{border-radius:20px;box-shadow:0 20px 50px -20px rgba(95,196,189,.6)}
.final h2{margin-top:30px;font-weight:700;font-size:clamp(40px,6.4vw,80px);line-height:1.02;letter-spacing:-.04em}
.final p{margin:16px 0 36px;font-size:21px;color:#a1a1a6}

/* Footer façon Apple */
.footer{background:var(--bg-2);padding:22px 0 30px;font-size:12px;color:var(--muted)}
.footer__liens{display:flex;flex-wrap:wrap;gap:6px 0;padding-bottom:12px;margin-bottom:12px;border-bottom:1px solid var(--line)}
.footer__liens a{color:#424245;padding:0 10px;border-left:1px solid var(--line)}
.footer__liens a:first-child{padding-left:0;border-left:0}
.footer__liens a:hover{text-decoration:underline}

/* Mouvement */
.anim{opacity:0;transform:translateY(16px);animation:entree 1.1s var(--ease) forwards;animation-delay:calc(.15s + var(--d) * .12s)}
.reveal{opacity:0;transform:translateY(30px);transition:opacity 1s var(--ease),transform 1s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
.ecran.reveal.is-in{transform:scale(var(--k,.88))}
html.pret .anim{opacity:1;transform:none}
@keyframes entree{to{opacity:1;transform:none}}
@keyframes reflet{to{background-position:100% 0}}
@keyframes pouls{0%{box-shadow:0 0 0 0 rgba(31,158,150,.5)}70%{box-shadow:0 0 0 8px rgba(31,158,150,0)}100%{box-shadow:0 0 0 0 rgba(31,158,150,0)}}
@keyframes pouls-v{0%{box-shadow:0 0 0 0 rgba(48,201,107,.55)}70%{box-shadow:0 0 0 10px rgba(48,201,107,0)}100%{box-shadow:0 0 0 0 rgba(48,201,107,0)}}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .anim,.reveal{opacity:1;transform:none}
  .ecran{transform:none}
}

@media (max-width:820px){
  .hero__in{flex-direction:column;align-items:stretch;padding-bottom:40px}
  .carte{flex:none}
}
@media (max-width:700px){
  .ecran{border-radius:18px}
  .final p{font-size:18px}
}
@media (max-width:340px){
  .wrap,.nav__in{width:calc(100% - 32px)}
  .nav .brand span{display:none}
}