@font-face{font-family:"Space Grotesk";font-weight:400;font-display:swap;src:url(fonts/space-grotesk-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"Space Grotesk";font-weight:500;font-display:swap;src:url(fonts/space-grotesk-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"Space Grotesk";font-weight:700;font-display:swap;src:url(fonts/space-grotesk-latin-700-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-weight:400;font-display:swap;src:url(fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-weight:500;font-display:swap;src:url(fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-weight:600;font-display:swap;src:url(fonts/ibm-plex-mono-latin-600-normal.woff2) format("woff2")}
:root{
  --bg:#040811; --surface:#081423; --ink:#eaf5fb; --muted:#93a8b8; --line:#17384a;
  --accent:#33dfff; --accent-ink:#03121a; --violet:#a78bfa; --glow:rgba(51,223,255,.3);
  --soft:rgba(51,223,255,.07);
  --mono:"IBM Plex Mono",ui-monospace,Consolas,monospace;
  --sans:"Space Grotesk","Segoe UI",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;color-scheme:dark}
body{margin:0;color:var(--ink);font:17px/1.65 var(--sans);background:
 radial-gradient(1px 1px at 12% 18%,#fff9 50%,transparent 51%),
 radial-gradient(1px 1px at 78% 8%,#fff8 50%,transparent 51%),
 radial-gradient(1.5px 1.5px at 44% 32%,#bfe9ff99 50%,transparent 51%),
 radial-gradient(1px 1px at 90% 44%,#fff7 50%,transparent 51%),
 radial-gradient(1px 1px at 6% 62%,#fff7 50%,transparent 51%),
 radial-gradient(1.5px 1.5px at 62% 74%,#bfe9ff88 50%,transparent 51%),
 radial-gradient(1px 1px at 30% 90%,#fff7 50%,transparent 51%),
 radial-gradient(900px 520px at 72% -8%,#0c2a3d 0%,transparent 62%),
 radial-gradient(700px 420px at 8% 40%,#10163a 0%,transparent 60%),var(--bg);
 background-size:330px 330px,410px 410px,520px 520px,370px 370px,450px 450px,600px 600px,300px 300px,auto,auto,auto;
 background-attachment:scroll}
a{color:var(--accent)}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
header.top{border-bottom:1px solid var(--line);background:rgba(4,8,17,.82);backdrop-filter:blur(8px);position:sticky;top:0;z-index:20}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{font-weight:700;letter-spacing:.42em;text-decoration:none;color:var(--ink);font-size:1.05rem}
.brand small{font:400 .7rem/1 var(--mono);letter-spacing:.14em;color:var(--muted);margin-left:14px;text-transform:uppercase;display:none}
@media(min-width:900px){.brand small{display:inline}}
nav a{margin-left:20px;text-decoration:none;color:var(--muted);font-size:.92rem}
nav a:hover{color:var(--ink)}
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);padding:12px 22px;border-radius:9px;text-decoration:none;font-weight:700;box-shadow:0 0 22px var(--glow)}
.btn:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line);box-shadow:none;font-weight:500}
.btn.ghost:hover{border-color:var(--accent);color:var(--accent)}
.eyebrow{font:500 .76rem/1 var(--mono);letter-spacing:.2em;text-transform:uppercase;color:var(--accent);margin:0 0 14px}
.hero{padding:64px 20px 8px}
.hero h1{font-size:clamp(2.1rem,5.2vw,3.4rem);line-height:1.1;margin:0 0 18px;max-width:17em;letter-spacing:-.02em}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p.lead{font-size:1.15rem;color:var(--muted);max-width:40em;margin:0 0 28px}
.actions{display:flex;gap:12px;flex-wrap:wrap}

/* scène orbitale */
.scene{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.8fr);gap:28px;align-items:center;padding:28px 0 64px}
.stage{position:relative;width:100%;max-width:700px;aspect-ratio:1/1;margin:0 auto}
.stage svg.links{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.ring{position:absolute;border:1px dashed #1d4a5e;border-radius:50%;left:50%;top:50%;transform:translate(-50%,-50%)}
.ring.r1{width:50%;height:50%}.ring.r2{width:82%;height:82%}.ring.r3{width:99%;height:99%;border-style:solid;border-color:#12303f}
.core{position:absolute;left:50%;top:50%;width:22%;aspect-ratio:1/1;transform:translate(-50%,-50%);border-radius:50%;
 background:radial-gradient(circle at 35% 28%,#9ff0ff 0%,#2cc9ec 36%,#0b5c86 78%,#082f4b 100%);
 box-shadow:0 0 60px var(--glow),inset 0 0 30px rgba(255,255,255,.25);display:grid;place-items:center;text-align:center;color:#03202e}
.core b{display:block;letter-spacing:.3em;font-size:clamp(.8rem,2.2vw,1.25rem)}
.core span{display:block;font:500 clamp(.45rem,1.1vw,.62rem)/1.3 var(--mono);letter-spacing:.18em;text-transform:uppercase}
.planet{position:absolute;transform:translate(-50%,-50%);width:13%;display:flex;flex-direction:column;align-items:center;gap:6px;background:none;border:0;color:var(--ink);cursor:pointer;font:inherit;padding:0}
.planet .orb{width:100%;aspect-ratio:1/1;border-radius:50%;display:block;
 background:radial-gradient(circle at 34% 28%,#b9f6ff 0%,#33cfee 34%,#0c6b92 76%,#08334d 100%);
 box-shadow:0 0 22px rgba(51,223,255,.35);border:1px solid rgba(160,240,255,.5);animation:drift 7s ease-in-out infinite}
.planet.v .orb{background:radial-gradient(circle at 34% 28%,#e1d6ff 0%,#a78bfa 36%,#5b3fb3 78%,#2a1c5e 100%);box-shadow:0 0 22px rgba(167,139,250,.4);border-color:rgba(214,200,255,.55)}
.planet .lab{white-space:nowrap;font:500 clamp(.56rem,1.5vw,.78rem)/1.2 var(--mono);letter-spacing:.04em;text-align:center;color:var(--ink);text-shadow:0 1px 6px #000}
.planet:hover .orb,.planet:focus-visible .orb,.planet[aria-pressed=true] .orb{box-shadow:0 0 0 3px rgba(51,223,255,.18),0 0 34px rgba(51,223,255,.7);border-color:#fff}
.planet.v:hover .orb,.planet.v[aria-pressed=true] .orb{box-shadow:0 0 0 3px rgba(167,139,250,.2),0 0 34px rgba(167,139,250,.75)}
.planet:focus-visible{outline:2px solid var(--accent);outline-offset:6px;border-radius:12px}
.planet:nth-of-type(2n) .orb{animation-delay:-2.6s}.planet:nth-of-type(3n) .orb{animation-delay:-4.4s}
@keyframes drift{0%,100%{transform:translateY(0)}50%{transform:translateY(-5px)}}
@media (prefers-reduced-motion:reduce){.planet .orb{animation:none}html{scroll-behavior:auto}}
.panel{background:linear-gradient(180deg,rgba(10,26,40,.92),rgba(6,16,28,.92));border:1px solid #1f5566;border-radius:14px;padding:24px;box-shadow:0 0 44px rgba(51,223,255,.08)}
.panel .eyebrow{margin-bottom:12px}
.panel h2{font-size:1.5rem;margin:0 0 10px;letter-spacing:-.01em}
.panel p{margin:0 0 16px;color:var(--muted)}
.avoid{border-left:2px solid var(--accent);padding:4px 0 4px 14px;margin:0 0 18px}
.avoid small{display:block;font:500 .7rem/1 var(--mono);letter-spacing:.16em;color:var(--accent);text-transform:uppercase;margin-bottom:6px}
.avoid span{color:var(--ink)}
.hint{margin:14px 0 0;color:var(--muted);font-size:.9rem}
.panel .more{font:500 .85rem var(--mono);letter-spacing:.06em}

section.blk{padding:60px 0;border-top:1px solid var(--line)}
section.blk h2{font-size:1.65rem;margin:0 0 8px;letter-spacing:-.01em}
section.blk p.intro{color:var(--muted);margin:0 0 30px;max-width:42em}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(285px,1fr));gap:16px}
.card{background:linear-gradient(180deg,var(--surface),#060e18);border:1px solid var(--line);border-radius:12px;padding:22px}
.card h3{margin:0 0 6px;font-size:1.06rem}.card p{margin:0;color:var(--muted);font-size:.97rem}
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;padding:0;list-style:none;margin:0}
.steps li{counter-increment:s;background:linear-gradient(180deg,var(--surface),#060e18);border:1px solid var(--line);border-radius:12px;padding:22px}
.steps li::before{content:"0" counter(s);display:block;font:600 .9rem/1 var(--mono);letter-spacing:.14em;color:var(--accent);margin-bottom:14px}
.steps h3{margin:0 0 4px;font-size:1.06rem}.steps p{margin:0;color:var(--muted);font-size:.97rem}
ul.plain{list-style:none;padding:0;margin:0;display:grid;gap:10px}
ul.plain li{padding:14px 18px 14px 44px;background:var(--soft);border:1px solid var(--line);border-radius:10px;position:relative}
ul.plain li::before{content:"";position:absolute;left:18px;top:50%;width:10px;height:10px;margin-top:-5px;border-radius:50%;border:2px solid var(--accent)}
.cta{background:linear-gradient(135deg,#0b2430,#08141e);border:1px solid #1f5566;border-radius:14px;padding:34px;display:flex;gap:24px;align-items:center;justify-content:space-between;flex-wrap:wrap;box-shadow:0 0 40px rgba(51,223,255,.08)}
.cta h2{margin:0 0 6px}.cta p{margin:0;color:var(--muted)}
footer{border-top:1px solid var(--line);padding:28px 0 40px;color:var(--muted);font-size:.9rem}
footer .wrap{display:flex;gap:16px;justify-content:space-between;flex-wrap:wrap}footer a{color:var(--muted)}
.legal{padding:44px 20px 72px;max-width:820px}
.legal h1{font-size:2rem;margin:0 0 8px}
.legal h2{font:500 .8rem/1 var(--mono);letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin:2.2rem 0 .7rem}
@media(max-width:900px){.scene{grid-template-columns:1fr;gap:8px;padding-bottom:40px}.planet{width:14%}}
@media(max-width:640px){nav a:not(.btn){display:none}.hero{padding:44px 20px 0}.cta{padding:24px}.brand{letter-spacing:.3em}.panel{padding:20px}}