:root{--bg:#f3f4fa;--fg:#14151c;--card:#fff;--mut:#5d6176;--bd:#e3e5f0;--acc:#5b5bf0;--acc2:#8b5cf6;--sh:0 1px 2px rgba(20,21,40,.05),0 10px 28px rgba(20,21,40,.08)}
@media (prefers-color-scheme:dark){:root{--bg:#0d0e15;--fg:#f1f2f8;--card:#171925;--mut:#9195ac;--bd:#272a3b;--acc:#7b7bf7;--acc2:#9b7bf7;--sh:0 1px 2px rgba(0,0,0,.4),0 10px 28px rgba(0,0,0,.4)}}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--fg);font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-font-smoothing:antialiased;line-height:1.55}
body::before{content:"";position:fixed;inset:0 0 auto;height:420px;background:radial-gradient(60% 100% at 50% 0,rgba(124,92,246,.18),transparent);pointer-events:none;z-index:-1}
a{color:var(--acc)}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header.top{display:flex;align-items:center;justify-content:space-between;padding:18px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--fg);text-decoration:none;letter-spacing:-.01em}
.brand img{width:40px;height:40px;object-fit:contain}
nav a{color:var(--mut);text-decoration:none;font-weight:600;font-size:15px;margin-left:18px}
nav a:hover{color:var(--fg)}
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding:48px 0 56px}
.hero h1{font-size:clamp(34px,6vw,56px);line-height:1.05;letter-spacing:-.035em;margin:0 0 18px}
.hero p.lead{font-size:19px;color:var(--mut);margin:0 0 28px;max-width:34em}
.btn{display:inline-flex;align-items:center;gap:10px;background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;text-decoration:none;font-weight:700;padding:15px 22px;border-radius:16px;box-shadow:0 12px 26px -10px rgba(91,91,240,.7)}
.btn small{display:block;font-weight:500;font-size:12px;opacity:.85;line-height:1.1}
.btn svg{flex:none}
.note{font-size:14px;color:var(--mut);margin-top:12px}
.stage{display:flex;justify-content:center;align-items:center;gap:0;min-height:260px}
.ball{width:150px;height:150px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:30px;position:relative;animation:bob 3.2s ease-in-out infinite}
.ball.w{background:radial-gradient(circle at 32% 26%,#fff 0,#f5f3ee 35%,#d6d3c9 75%,#b0ab9f 100%);box-shadow:inset -9px -11px 20px rgba(0,0,0,.2),inset 3px 3px 8px rgba(255,255,255,.9),0 16px 22px rgba(20,10,60,.28);color:#9c6a1c;z-index:1}
.ball.b{background:radial-gradient(circle at 32% 26%,#5c5c62 0,#28282c 30%,#0c0c0e 70%,#000 100%);box-shadow:inset -9px -11px 20px rgba(0,0,0,.65),inset 3px 3px 8px rgba(255,255,255,.14),0 16px 22px rgba(20,10,60,.4);color:#b8862f;margin-left:-26px;animation-delay:-1.6s}
.ball::after{content:"";position:absolute;top:8%;left:16%;width:40%;height:24%;border-radius:50%;background:linear-gradient(rgba(255,255,255,.8),rgba(255,255,255,0));transform:rotate(-32deg);opacity:.5}
@keyframes bob{50%{transform:translateY(-10px)}}
@media (prefers-reduced-motion:reduce){.ball{animation:none}}
section{padding:40px 0}
h2{font-size:30px;letter-spacing:-.025em;margin:0 0 22px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:var(--card);border:1px solid var(--bd);border-radius:20px;padding:22px;box-shadow:var(--sh)}
.card h3{margin:0 0 8px;font-size:18px;letter-spacing:-.01em}
.card p{margin:0;color:var(--mut);font-size:15.5px}
.num{display:inline-flex;width:24px;height:24px;border-radius:50%;align-items:center;justify-content:center;background:var(--bg);font-size:13px;font-weight:800;margin-right:8px;vertical-align:2px}
.ico{width:46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:14px;color:#fff;background:linear-gradient(135deg,var(--acc),var(--acc2));box-shadow:0 8px 18px -8px rgba(91,91,240,.6)}
details{background:var(--card);border:1px solid var(--bd);border-radius:16px;padding:16px 20px;margin-bottom:10px}
summary{font-weight:700;cursor:pointer}
details p{color:var(--mut);margin:10px 0 0}
footer{border-top:1px solid var(--bd);margin-top:40px;padding:28px 0 40px;color:var(--mut);font-size:14px;display:flex;flex-wrap:wrap;gap:10px 22px;justify-content:space-between}
footer a{color:var(--mut)}
.doc{max-width:720px;margin:0 auto;padding:20px 20px 40px}
.doc h1{font-size:38px;letter-spacing:-.03em;margin:20px 0 6px}
.doc h2{font-size:22px;margin:34px 0 10px}
.doc h3{font-size:17px;margin:24px 0 6px}
.doc p,.doc li{color:var(--fg);font-size:16px}
.doc .muted{color:var(--mut)}
.doc .box{background:var(--card);border:1px solid var(--bd);border-radius:16px;padding:16px 20px;margin:18px 0}
@media (max-width:760px){.hero{grid-template-columns:1fr;padding-top:20px;gap:10px}.stage{min-height:200px;order:-1}.ball{width:110px;height:110px;font-size:24px}.grid{grid-template-columns:1fr}nav a{margin-left:12px;font-size:14px}}
.play-badge{display:inline-block;line-height:0;border-radius:10px;transition:transform .15s}.play-badge:hover{transform:translateY(-1px)}.play-badge img{height:60px;width:auto}
@media (prefers-color-scheme:dark){.brand img{filter:invert(1) brightness(1.15)}}
.brand .grey{color:#8e8f93}