/* Présentation de la plateforme : mêmes couleurs, même police et même verre dépoli que l'application. */
:root{
  --ink:#14171a; --txt-2:#5d6670; --txt-3:#8d959e; --cyan:#1ab5ea; --vert:#51c396;
  --verre:rgba(255,255,255,.58); --verre-fort:rgba(255,255,255,.82); --bord:rgba(255,255,255,.95); --trait:rgba(20,23,26,.08);
  --r:22px; --font:Urbanist,system-ui,sans-serif;
  --fond:radial-gradient(900px 520px at 10% 4%,rgba(26,181,234,.16),transparent 60%),radial-gradient(800px 520px at 92% 30%,rgba(81,195,150,.13),transparent 60%),#f3f7f9;
}
@view-transition{navigation:auto}
::view-transition-old(root),::view-transition-new(root){animation-duration:.28s}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:400 17px/1.55 var(--font);color:var(--ink);background:var(--fond);background-attachment:fixed;min-height:100vh}
a{color:inherit}
h1,h2{line-height:1.12;letter-spacing:-.02em;margin:0;font-weight:700}
h1{font-size:clamp(34px,5vw,54px)}
h2{font-size:clamp(22px,2.6vw,30px)}
.sur{font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--txt-3);margin:0 0 10px}
.chapo{font-size:clamp(17px,1.6vw,20px);color:var(--txt-2);max-width:640px;margin:16px 0 0}

/* en-tête : barre de verre */
.haut{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:20px;padding:14px max(20px,calc((100vw - 1180px)/2));
  background:rgba(243,247,249,.72);backdrop-filter:blur(18px) saturate(1.4);-webkit-backdrop-filter:blur(18px) saturate(1.4);border-bottom:1px solid var(--trait)}
.marque{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-size:17px;margin-right:auto}
.marque svg{width:34px;height:34px;border-radius:10px}
.menu{display:flex;gap:4px}
.menu a,.langue{text-decoration:none;font-weight:600;font-size:15px;padding:9px 16px;border-radius:999px;color:var(--txt-2);transition:background .2s,color .2s}
.menu a:hover{background:var(--verre-fort);color:var(--ink)}
.menu a[aria-current]{background:var(--ink);color:#fff}
.langue{border:1px solid var(--trait);background:var(--verre-fort);color:var(--ink)}

main{max-width:1180px;margin:0 auto;padding:0 20px 40px}
.hero{display:grid;grid-template-columns:1fr 1.15fr;gap:56px;align-items:center;padding:72px 0 56px;min-height:min(78vh,720px)}
.duo{display:grid;gap:16px}
.vid.mini{flex-direction:row;align-items:center;gap:16px;background:var(--verre);border:1px solid var(--bord);border-radius:18px;padding:10px;backdrop-filter:blur(14px)}
.vid.mini .img{width:150px;flex:none;border-radius:12px}
.vid.mini .play{width:38px;height:38px;margin:-19px 0 0 -19px}.vid.mini .play::after{left:15px;top:12px;border-left-width:12px;border-top-width:7px;border-bottom-width:7px}
.vid.mini .duree{display:none}
.vid.mini .q small{display:block;color:var(--txt-2);font-weight:500;font-size:14px}
.titre{padding:56px 0 8px}

/* cartes vidéo : miniature qui s'ouvre en lightbox */
.vid{all:unset;cursor:pointer;display:flex;flex-direction:column;gap:10px;-webkit-tap-highlight-color:transparent}
.vid .img{position:relative;display:block;border-radius:18px;overflow:hidden;aspect-ratio:16/9;background:#dfe7eb;
  box-shadow:0 1px 0 var(--bord) inset,0 10px 30px -14px rgba(20,23,26,.35);transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s}
.vid img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s cubic-bezier(.2,.8,.2,1)}
.vid:hover .img{transform:translateY(-3px);box-shadow:0 1px 0 var(--bord) inset,0 18px 40px -16px rgba(20,23,26,.45)}
.vid:hover img{transform:scale(1.035)}
.vid:active .img{transform:scale(.98)}
.vid:focus-visible .img{outline:3px solid var(--cyan);outline-offset:3px}
.play{position:absolute;left:50%;top:50%;width:54px;height:54px;margin:-27px 0 0 -27px;border-radius:50%;background:rgba(20,23,26,.82);backdrop-filter:blur(6px);transition:transform .3s}
.play::after{content:"";position:absolute;left:21px;top:17px;border-left:16px solid #fff;border-top:10px solid transparent;border-bottom:10px solid transparent}
.vid:hover .play{transform:scale(1.1)}
.grande .play{width:68px;height:68px;margin:-34px 0 0 -34px}
.grande .play::after{left:27px;top:22px;border-left-width:19px;border-top-width:12px;border-bottom-width:12px}
.duree{position:absolute;right:10px;bottom:10px;background:rgba(20,23,26,.8);color:#fff;font-size:12.5px;font-weight:600;padding:3px 9px;border-radius:999px}
.vid .q{font-weight:600;font-size:17px;line-height:1.3}
.vid .sous{color:var(--txt-2);font-size:15px;margin-top:-6px}

.atouts{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;padding:12px 0 24px}
.atout,.option,.bloc.formation-tease{background:var(--verre);border:1px solid var(--bord);border-radius:var(--r);padding:26px;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.atout .n{display:inline-block;font-size:13px;font-weight:700;color:var(--cyan);margin-bottom:14px}
.atout h2{font-size:21px}
.atout p,.option p{color:var(--txt-2);margin:8px 0 0}
.bloc{padding:44px 0 0}
.bloc>h2{margin-bottom:20px}
.tete{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:22px}
.tete p{color:var(--txt-2);margin:8px 0 0;max-width:620px}
.grille3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px 18px}
.grille4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.btn{display:inline-flex;align-items:center;white-space:nowrap;text-decoration:none;font-weight:600;font-size:15px;padding:12px 20px;border-radius:999px;background:var(--verre-fort);border:1px solid var(--trait);transition:transform .2s}
.btn:hover{transform:translateY(-2px)}
.btn.noir{background:var(--ink);color:#fff;border-color:var(--ink)}
.bloc.formation-tease{margin-top:44px;display:flex;justify-content:space-between;align-items:center;gap:20px}
.formation-tease p{color:var(--txt-2);margin:8px 0 0}

.options{display:grid;grid-template-columns:1fr 1fr;gap:18px;padding:28px 0 0}
.option{position:relative}
.option.reco{border:2px solid var(--ink)}
.badge{position:absolute;top:-12px;right:20px;background:var(--ink);color:#fff;font-size:12.5px;font-weight:700;padding:5px 12px;border-radius:999px}
.exemple{display:grid;grid-template-columns:1.4fr 1fr;gap:36px;align-items:start}
.pasos{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.pasos li{display:flex;align-items:center;gap:14px;background:var(--verre);border:1px solid var(--bord);border-radius:16px;padding:12px 16px;font-weight:600}
.pasos li span{flex:none;width:30px;height:30px;border-radius:50%;background:var(--ink);color:#fff;display:grid;place-items:center;font-size:14px}

.pied{text-align:center;color:var(--txt-3);font-size:14px;padding:30px 20px 40px}
.pied a{color:var(--txt-2);font-weight:600}
.tabs{display:none}

/* apparitions au défilement */
.apparait{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.8,.2,1)}
.apparait.vu{opacity:1;transform:none}

/* lightbox */
.lb{border:0;padding:0;background:transparent;max-width:min(1100px,94vw);width:100%}
.lb::backdrop{background:rgba(10,13,15,.82);backdrop-filter:blur(6px)}
.lb[open]{animation:lb .3s cubic-bezier(.2,.8,.2,1)}
@keyframes lb{from{opacity:0;transform:scale(.96)}}
.lb-haut{display:flex;justify-content:space-between;align-items:center;gap:16px;color:#fff;padding:0 2px 10px}
.lb-haut b{font-size:18px;font-weight:600}
.x{all:unset;cursor:pointer;width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.14);color:#fff;font-size:26px;line-height:40px;text-align:center;flex:none}
.lb video{width:100%;border-radius:16px;background:#000;display:block;aspect-ratio:16/9}
video::cue{font-family:var(--font);font-size:clamp(14px,2vw,22px);background:rgba(10,13,15,.78)}

/* page d'entrée */
.entree{background:radial-gradient(900px 600px at 20% 10%,rgba(26,181,234,.25),transparent 60%),radial-gradient(800px 600px at 85% 90%,rgba(81,195,150,.18),transparent 60%),#14171a;color:#fff;display:grid;place-items:center;min-height:100vh}
.entree main{text-align:center;padding:40px 20px}
.entree .logo svg{width:72px;height:72px;border-radius:20px;box-shadow:0 0 0 1px rgba(255,255,255,.12)}
.entree h1{margin:26px 0 0}
.entree h1 span{color:rgba(255,255,255,.55);font-weight:500}
.entree p{color:rgba(255,255,255,.6);margin:18px 0 30px}
.choix{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.choix a{min-width:180px;text-decoration:none;font-weight:700;font-size:18px;padding:16px 28px;border-radius:999px;background:#fff;color:var(--ink);transition:transform .2s}
.choix a+a{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.25)}
.choix a:hover{transform:translateY(-2px)}

@media (max-width:900px){
  .hero{grid-template-columns:1fr;gap:28px;padding:36px 0 24px}
  .grille4{grid-template-columns:repeat(2,1fr)}
  .grille3{grid-template-columns:repeat(2,1fr)}
  .exemple{grid-template-columns:1fr}
}
/* téléphone : comme une application (barre d'onglets en bas, en-tête flouté) */
@media (max-width:680px){
  body{font-size:16px;padding-bottom:calc(76px + env(safe-area-inset-bottom))}
  .haut{padding:12px 16px}
  .menu{display:none}
  .marque span{font-size:15px}
  main{padding:0 16px 20px}
  .atouts,.grille3,.options,.bloc.formation-tease{grid-template-columns:1fr}
  .hero{min-height:0}
  .bloc.formation-tease,.tete{flex-direction:column;align-items:flex-start}
  .grille4{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;margin:0 -16px;padding:0 16px 6px;gap:12px}
  .grille4 .vid{flex:0 0 72%;scroll-snap-align:start}
  .tabs{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:30;justify-content:space-around;padding:8px 8px calc(8px + env(safe-area-inset-bottom));
    background:rgba(243,247,249,.82);backdrop-filter:blur(18px) saturate(1.4);-webkit-backdrop-filter:blur(18px) saturate(1.4);border-top:1px solid var(--trait)}
  .tabs a{display:flex;flex-direction:column;align-items:center;gap:3px;text-decoration:none;font-size:11.5px;font-weight:600;color:var(--txt-3);padding:4px 10px;border-radius:12px;-webkit-tap-highlight-color:transparent}
  .tabs a:active{transform:scale(.94)}
  .tabs svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
  .tabs a[aria-current]{color:var(--ink)}
  .lb{max-width:100vw}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}.apparait{opacity:1;transform:none}}