:root{
  --bg:#080a1c; --bg2:#0e1130; --ink:#e8ecff; --mute:#8b93c4;
  --cy:#22e0ff; --pk:#ff7ad9; --vi:#8a6bff; --line:rgba(120,140,255,.18);
}
*{box-sizing:border-box;margin:0}
html{scroll-behavior:smooth}
body{
  background:radial-gradient(1200px 700px at 80% -10%,#1b1f5a55,transparent),var(--bg);
  color:var(--ink);font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  line-height:1.6;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
.stars{position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:radial-gradient(1.5px 1.5px at 20px 30px,#fff8,transparent),
  radial-gradient(1px 1px at 120px 90px,#9dfbffaa,transparent),
  radial-gradient(1.5px 1.5px at 210px 160px,#ff7ad9aa,transparent),
  radial-gradient(1px 1px at 300px 40px,#fff8,transparent);
  background-size:340px 220px;opacity:.7;transform:translateZ(0)}
@keyframes drift{to{background-position:-340px 220px}}

.nav{position:sticky;top:0;z-index:10;display:flex;justify-content:space-between;align-items:center;
  padding:14px clamp(16px,4vw,48px);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);transform:translateZ(0);background:#080a1ccc;border-bottom:1px solid var(--line)}
.logo{font-weight:800;font-size:1.25rem;letter-spacing:.02em}
.logo b{color:var(--cy)}
.nav nav{display:flex;gap:clamp(12px,2.5vw,28px);align-items:center;font-size:.95rem;color:var(--mute)}
.nav nav a:hover{color:var(--ink)}
.btn-mini{padding:6px 14px;border:1px solid var(--cy);border-radius:99px;color:var(--cy)!important}

.hero{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.3fr);gap:clamp(20px,4vw,56px);
  align-items:center;padding:clamp(28px,6vw,72px) clamp(16px,4vw,48px);max-width:1300px;margin:auto}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font:600 .8rem ui-monospace,Menlo,monospace;color:var(--cy);
  border:1px solid var(--line);padding:5px 12px;border-radius:99px;background:#0e1130aa}
.eyebrow i{width:8px;height:8px;border-radius:50%;background:#3dff9a;box-shadow:0 0 10px #3dff9a;animation:pulse 1.4s infinite}
@keyframes pulse{50%{opacity:.3}}
h1{font-size:clamp(3.4rem,10vw,7rem);line-height:1;font-weight:900;margin:18px 0 14px;letter-spacing:-.03em}
.glitch{position:relative;color:var(--cy);text-shadow:0 0 30px #22e0ff88}
.glitch::before,.glitch::after{content:attr(data-text);position:absolute;left:0;top:0;opacity:.7}
.glitch::before{color:var(--pk);animation:gl 3.2s infinite steps(1)}
.glitch::after{color:var(--vi);animation:gl 2.7s infinite steps(1) reverse}
@keyframes gl{0%,92%,100%{transform:none;clip-path:inset(0 0 100% 0)}93%{transform:translate(-3px,1px);clip-path:inset(20% 0 50% 0)}96%{transform:translate(3px,-1px);clip-path:inset(60% 0 10% 0)}}
.lead{font-size:clamp(1.05rem,2vw,1.3rem);color:#c4cbff}
.lead em{color:var(--pk);font-style:normal;font-weight:700}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.btn{display:inline-block;border:0;cursor:pointer;font:700 1rem inherit;padding:13px 24px;border-radius:12px;color:#04121a;
  background:linear-gradient(135deg,var(--cy),#7df3ff);box-shadow:0 0 28px #22e0ff55;transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px);box-shadow:0 0 40px #22e0ff99}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line);box-shadow:none}
.btn.ghost:hover{border-color:var(--pk)}

/* scene */
.scene{position:relative;aspect-ratio:3/2;width:100%;container-type:inline-size;transition:transform .25s ease-out;will-change:transform}
.scene-svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.screen{position:absolute;left:18.9%;top:7.6%;width:62.2%;height:53%;border-radius:12px;overflow:hidden;
  background:#070919;display:flex;flex-direction:column;font:1.62cqw/1.55 ui-monospace,'JetBrains Mono',Menlo,Consolas,monospace;
  box-shadow:inset 0 0 40px #22e0ff22}
.screen::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(0deg,transparent 0 2px,#00000022 2px 3px)}
.screen-bar{display:flex;align-items:center;gap:5px;padding:.4em .8em;background:#12163a;color:var(--mute);border-bottom:1px solid var(--line)}
.screen-bar i{width:.7em;height:.7em;border-radius:50%;background:#ff5f57}
.screen-bar i:nth-child(2){background:#febc2e}.screen-bar i:nth-child(3){background:#28c840}
.screen-bar span{margin-left:.8em;flex:1}
.live{font-style:normal;color:#ff5f7a;animation:pulse 1.2s infinite}
.code-viewport{flex:1;overflow:hidden;position:relative;padding:0 .8em;
  -webkit-mask-image:linear-gradient(transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(transparent,#000 8%,#000 92%,transparent)}
.code-track{white-space:pre;animation:scrollUp 22s linear infinite}
@keyframes scrollUp{to{transform:translateY(-50%)}}
.code-track .l{display:block;color:#cdd6ff;counter-increment:n}
.code-track .l::before{content:counter(n);display:inline-block;width:2.4em;margin-right:1em;text-align:right;color:#4d5588}
.code-track{counter-reset:n}
.k{color:#c792ff}.s{color:#7dffb2}.c{color:#5b6494;font-style:italic}.n{color:#ffb86b}.f{color:#5cd8ff}.t{color:#ff7ad9}
.screen-status{display:flex;align-items:center;gap:1em;padding:.35em .8em;background:#12163a;color:var(--mute);font-size:.9em}
.screen-status span:first-child{color:#3dff9a}
.bar{flex:1;height:.4em;background:#0a0d26;border-radius:9px;overflow:hidden}
.bar b{display:block;height:100%;width:40%;background:linear-gradient(90deg,var(--cy),var(--pk));animation:load 4s ease-in-out infinite}
@keyframes load{0%{width:5%}80%,100%{width:100%}}

.tail{transform-origin:584px 594px;animation:tail 3.6s ease-in-out infinite}
@keyframes tail{50%{transform:rotate(-7deg)}}
.head{transform-origin:450px 310px;animation:nod 5s ease-in-out infinite}
@keyframes nod{0%,100%{transform:rotate(0)}30%{transform:rotate(-2.2deg) translateY(1px)}60%{transform:rotate(1.8deg)}}
.ear-l{transform-origin:412px 214px;animation:ear 6s infinite}
.ear-r{transform-origin:488px 214px;animation:ear 6s infinite 2.4s}
@keyframes ear{0%,90%,100%{transform:rotate(0)}94%{transform:rotate(-9deg)}97%{transform:rotate(3deg)}}
.paw{animation:tap .34s ease-in-out infinite}
.paw-b{animation-delay:.17s}
@keyframes tap{50%{transform:translateY(-8px)}}
.leg-l{transform-origin:372px 336px;animation:legl .68s ease-in-out infinite}
.leg-r{transform-origin:528px 336px;animation:legl .68s ease-in-out infinite .34s}
@keyframes legl{50%{transform:rotate(-1.2deg)}}
.cat{animation:breathe 4s ease-in-out infinite;transform-origin:450px 600px}
@keyframes breathe{50%{transform:scaleY(1.012)}}
.steam{animation:steam 3s ease-in-out infinite}
@keyframes steam{0%{opacity:0;transform:translateY(6px)}50%{opacity:1}100%{opacity:0;transform:translateY(-8px)}}
.neon{filter:drop-shadow(0 0 6px #ff7ad9);animation:flick 5s infinite}
@keyframes flick{0%,92%,96%,100%{opacity:1}94%{opacity:.35}}

.float{position:absolute;font:700 1.2rem ui-monospace,monospace;color:var(--cy);opacity:.6;animation:floaty 6s ease-in-out infinite}
.f1{left:4%;top:8%}.f2{left:30%;top:0;color:var(--pk);animation-delay:-2s}.f3{right:0;top:-6%;color:var(--vi);animation-delay:-4s}
@keyframes floaty{50%{transform:translateY(-16px) rotate(6deg)}}

/* sections */
.section{max-width:1200px;margin:auto;padding:clamp(48px,8vw,96px) clamp(16px,4vw,48px)}
.kicker{font:600 .85rem ui-monospace,monospace;color:var(--cy)}
h2{font-size:clamp(1.9rem,4.5vw,3rem);line-height:1.15;margin:6px 0 16px;letter-spacing:-.02em}
.sub{color:var(--mute);max-width:60ch;margin-bottom:26px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin-top:28px}
.card{padding:22px;border:1px solid var(--line);border-radius:18px;background:linear-gradient(160deg,#141846cc,#0b0e2acc);
  transition:transform .25s,border-color .25s,box-shadow .25s}
.card:hover{transform:translateY(-6px);border-color:var(--cy);box-shadow:0 12px 40px #22e0ff22}
.ico{font-size:2rem}
.card h3{margin:8px 0 6px}
.card p{color:#aab2e6;font-size:.95rem}
.tags{display:flex;gap:6px;margin:14px 0}
.tags i{font:600 .72rem ui-monospace,monospace;font-style:normal;padding:3px 9px;border-radius:99px;background:#22e0ff18;color:var(--cy)}
.prog{height:6px;border-radius:9px;background:#0a0d26;overflow:hidden}
.prog b{display:block;height:100%;width:var(--p);background:linear-gradient(90deg,var(--cy),var(--pk))}

.world-wrap{position:relative;border:1px solid var(--line);border-radius:22px;overflow:hidden;background:#050717}
#world{display:block;width:100%;height:clamp(300px,52vw,460px);cursor:crosshair}
.stats{position:absolute;top:12px;right:12px;display:flex;gap:10px}
.stats div{background:#0a0d28cc;border:1px solid var(--line);border-radius:12px;padding:6px 12px;text-align:center;backdrop-filter:blur(6px)}
.stats b{display:block;font:800 1.1rem ui-monospace,monospace;color:var(--cy)}
.stats span{font-size:.68rem;color:var(--mute)}

.join form{display:flex;gap:10px;flex-wrap:wrap}
.join input{flex:1 1 200px;padding:13px 16px;border-radius:12px;border:1px solid var(--line);background:#0e1130;color:var(--ink);font:inherit}
.join input:focus{outline:2px solid var(--cy);outline-offset:1px}
.hint{margin-top:12px;color:#3dff9a;min-height:1.6em}
footer{text-align:center;padding:36px 16px 48px;color:var(--mute);border-top:1px solid var(--line)}
footer a{color:var(--cy)}

@media(max-width:860px){
  .hero{grid-template-columns:1fr}
  .stats{position:static;justify-content:center;padding:10px;background:#050717}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001s!important;animation-iteration-count:1!important}
  .code-track{animation:none!important}
}

/* ---- premium layer ---- */
:root{--glass:rgba(16,20,62,.82)}
body{font-family:"Space Grotesk",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
.nav{background:var(--glass);border-bottom:1px solid rgba(255,255,255,.06)}
h1{background:linear-gradient(180deg,#fff,#aeb8ff);-webkit-background-clip:text;background-clip:text;color:transparent}
h1 .glitch{-webkit-text-fill-color:var(--cy)}
.hero{position:relative;max-width:1400px}
.hero::before{content:"";position:absolute;left:-10%;top:10%;width:60%;height:70%;background:radial-gradient(closest-side,#8a6bff33,transparent);filter:blur(30px);z-index:-1}
.hero-stats{display:flex;gap:28px;margin-top:34px;padding-top:22px;border-top:1px solid var(--line)}
.hero-stats b{display:block;font:700 1.6rem ui-monospace,monospace;color:#fff}
.hero-stats span{font-size:.78rem;color:var(--mute);text-transform:uppercase;letter-spacing:.1em}
.scene{border-radius:26px;box-shadow:0 30px 60px -20px #000c}
.scene-svg{border-radius:26px}
.scene::after{content:"";position:absolute;inset:0;border-radius:26px;pointer-events:none;box-shadow:inset 0 0 0 1px rgba(255,255,255,.08),inset 0 0 80px #050717aa}
.btn{border-radius:99px}
.card{position:relative;background:var(--glass);border:1px solid rgba(255,255,255,.08);overflow:hidden}
.card::before{content:"";position:absolute;inset:0;background:radial-gradient(360px circle at var(--mx,50%) var(--my,0%),#22e0ff22,transparent 60%);opacity:0;transition:opacity .3s}
.card:hover::before{opacity:1}
.ico{display:grid;place-items:center;width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,#22e0ff33,#ff7ad933);border:1px solid rgba(255,255,255,.1)}
.marquee{overflow:hidden;border-block:1px solid var(--line);background:#0a0d2899;padding:14px 0;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.marquee div{display:flex;gap:44px;width:max-content;animation:mq 40s linear infinite;font:600 .9rem ui-monospace,monospace;color:var(--mute);white-space:nowrap}
.marquee span::before{content:"◆ ";color:var(--cy)}
@keyframes mq{to{transform:translateX(-50%)}}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s,transform .8s}
.reveal.in{opacity:1;transform:none}
.world-wrap{box-shadow:0 30px 80px #000a,0 0 0 1px rgba(255,255,255,.04)}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}.marquee div{animation:none}}
.cat-layer{pointer-events:none;z-index:2}
.screen{z-index:1}

/* ---- rendu 3D (WebGL) ---- */
#stage3d{position:absolute;inset:0;width:100%;height:100%;display:block;border-radius:26px;cursor:grab;touch-action:pan-y}
.scene.grab #stage3d{cursor:grabbing}
.scene.is3d{transform:none!important}
.scene.is3d .scene-svg,.scene.is3d .screen{display:none}
.scene.is3d::before{content:"Glisse pour tourner autour de Syncat";position:absolute;left:50%;bottom:12px;transform:translateX(-50%);z-index:3;
  font:600 .72rem ui-monospace,monospace;color:var(--mute);background:var(--glass);padding:5px 12px;border-radius:99px;border:1px solid var(--line);pointer-events:none;white-space:nowrap}

@media(max-width:860px){
  .scene-svg *{filter:none!important}
  .hero-stats{gap:18px;flex-wrap:wrap}
  .marquee div{animation-duration:55s}
}
@media(max-width:520px){
  .nav nav a{white-space:nowrap;font-size:.85rem}
  .nav nav{gap:10px}
  .logo{font-size:1.05rem;white-space:nowrap}
  .btn-mini{padding:5px 10px}
}

/* ---- bouton musique ---- */
.music{display:inline-flex;align-items:center;gap:8px;font:600 .85rem inherit;color:var(--ink);background:var(--glass);border:1px solid var(--line);
  border-radius:99px;padding:6px 12px;cursor:pointer;position:relative;transition:border-color .2s,box-shadow .2s}
.music:hover{border-color:var(--pk)}
.music:not(.on){animation:hint 2.4s ease-in-out infinite}
@keyframes hint{0%,100%{box-shadow:0 0 0 0 #ff7ad900}50%{box-shadow:0 0 0 6px #ff7ad933}}
.music.on{border-color:var(--pk);box-shadow:0 0 18px #ff7ad966;color:#fff}
.eq{display:inline-flex;align-items:flex-end;gap:2px;height:14px}
.eq i{width:3px;height:4px;background:var(--pk);border-radius:2px}
.music.on .eq i{animation:eq .9s ease-in-out infinite}
.music.on .eq i:nth-child(2){animation-delay:-.3s}.music.on .eq i:nth-child(3){animation-delay:-.6s}.music.on .eq i:nth-child(4){animation-delay:-.15s}
@keyframes eq{0%,100%{height:3px}50%{height:14px}}
@media(max-width:520px){.music .mtxt{display:none}.music{padding:7px 10px}}
@media(prefers-reduced-motion:reduce){.music:not(.on){animation:none}}

/* texte du héros placé en bas : sous la scène sur mobile, en bas de sa colonne sur ordinateur */
.hero-text{align-self:end;padding-bottom:clamp(0px,2vw,24px)}
@media(max-width:860px){
  .scene{order:1}
  .hero-text{order:2;align-self:auto;padding-bottom:0}
}