:root{
  --bg:#0a0b10; --bg2:#10121a; --card:rgba(255,255,255,.045); --line:rgba(255,255,255,.09);
  --tx:#e8eaf2; --dim:#9aa1b5; --acc:#22d3ee; --acc2:#a78bfa; --ok:#34d399; --bad:#fb7185;
  --grad:linear-gradient(135deg,#22d3ee 0%,#818cf8 55%,#a78bfa 100%);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--tx);font:16px/1.6 Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;min-height:100vh}
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(600px 400px at 85% -5%,rgba(167,139,250,.14),transparent 60%),
             radial-gradient(700px 500px at -10% 20%,rgba(34,211,238,.10),transparent 60%)}
a{color:var(--acc);text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(10,11,16,.72);border-bottom:1px solid var(--line)}
nav{display:flex;align-items:center;gap:26px;height:62px}
.logo{font-weight:800;font-size:19px;letter-spacing:.3px;color:var(--tx)}
.logo b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
nav .links{display:flex;gap:20px;margin-left:auto;font-size:14.5px}
nav .links a{color:var(--dim)}nav .links a:hover,nav .links a.on{color:var(--tx)}
.hero{padding:88px 0 60px;text-align:center}
.kicker{display:inline-block;font-size:12.5px;letter-spacing:2.2px;text-transform:uppercase;color:var(--acc);
  border:1px solid rgba(34,211,238,.35);padding:6px 14px;border-radius:999px;margin-bottom:22px}
h1{font-size:clamp(34px,6vw,58px);line-height:1.08;font-weight:800;letter-spacing:-.5px}
h1 .g{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{color:var(--dim);max-width:640px;margin:18px auto 30px;font-size:17.5px}
.btn{display:inline-block;background:var(--grad);color:#06121a;font-weight:700;border:0;border-radius:14px;
  padding:14px 28px;font-size:16px;cursor:pointer;transition:.15s}
.btn:hover{transform:translateY(-1px);filter:brightness(1.1)}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--tx)}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:18px;margin:34px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:24px;transition:.18s;display:block;color:var(--tx)}
.card:hover{border-color:rgba(34,211,238,.45);transform:translateY(-3px)}
.card .ico{font-size:30px}
.card h3{margin:10px 0 6px;font-size:19px}
.card p{color:var(--dim);font-size:14.5px}
.tag{display:inline-block;font-size:11.5px;color:var(--acc2);border:1px solid rgba(167,139,250,.35);border-radius:999px;padding:2px 10px;margin:10px 6px 0 0}
h2{font-size:26px;margin:52px 0 6px}
.note{color:var(--dim);font-size:15px;max-width:700px}
footer{border-top:1px solid var(--line);margin-top:80px;padding:34px 0;color:var(--dim);font-size:14px;text-align:center}
/* game chrome */
.stage{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:18px;margin-top:22px}
@media(max-width:900px){.stage{grid-template-columns:1fr}}
.panel{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:20px}
.videobox{position:relative;border-radius:20px;overflow:hidden;background:#000;aspect-ratio:4/3}
.videobox video,.videobox canvas{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transform:scaleX(-1)}
.hud{position:absolute;top:12px;left:12px;right:12px;display:flex;justify-content:space-between;gap:8px;pointer-events:none}
.pill{background:rgba(8,10,16,.72);border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:14px;font-weight:600}
.msg{font-size:clamp(20px,3.4vw,30px);font-weight:800;text-align:center;padding:14px 0;min-height:64px}
.msg .g{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.bar{height:9px;background:rgba(255,255,255,.07);border-radius:99px;overflow:hidden;margin:5px 0 12px}
.bar i{display:block;height:100%;background:var(--grad);border-radius:99px;transition:width .12s}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.score{font-variant-numeric:tabular-nums;font-weight:800;font-size:22px}
.learn{margin-top:26px;border-left:3px solid var(--acc);background:var(--card);border-radius:0 16px 16px 0;padding:16px 20px}
.learn h4{margin-bottom:6px}
.learn p{color:var(--dim);font-size:14.5px}
/* quiz */
.qimg{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:18px;border:1px solid var(--line);background:#000}
.choices{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:16px}
.pick{padding:18px;font-size:18px;font-weight:700}
.pick.wrong{background:rgba(251,113,133,.18);border:1px solid var(--bad);color:var(--tx);filter:none}
.pick.right{background:rgba(52,211,153,.18);border:1px solid var(--ok);color:var(--tx);filter:none}
.verdict{margin-top:14px;border-radius:16px;padding:16px 18px;border:1px solid var(--line);background:var(--card);display:none}
.verdict h4{margin-bottom:4px}
.verdict p{color:var(--dim);font-size:14.5px}
.prog{height:6px;background:rgba(255,255,255,.07);border-radius:99px;margin-top:14px;overflow:hidden}
.prog i{display:block;height:100%;background:var(--grad);width:0}
/* news */
.paper{display:flex;gap:16px;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:16px;margin-bottom:14px;align-items:flex-start}
.paper img{width:120px;border-radius:10px;border:1px solid var(--line);flex:none}
@media(max-width:640px){.paper img{display:none}}
.paper h3{font-size:16.5px;line-height:1.35}
.paper .meta{color:var(--dim);font-size:13px;margin:6px 0}
.paper .sum{color:var(--dim);font-size:14px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.chip{display:inline-block;font-size:12px;font-weight:700;color:#0b1220;background:var(--grad);border-radius:999px;padding:2px 10px}
.switch{display:inline-flex;align-items:center;gap:8px;color:var(--dim);font-size:14px;cursor:pointer}
input[type=checkbox]{accent-color:var(--acc);width:16px;height:16px}
/* donate */
.supportbox{display:flex;gap:30px;align-items:center;flex-wrap:wrap;background:var(--card);border:1px solid var(--line);border-radius:20px;padding:24px}
.qrbox{display:flex;flex-direction:column;align-items:center;gap:10px}
.qrbox img{width:210px;height:210px;object-fit:contain;background:#fff;border-radius:14px;padding:10px;box-shadow:0 8px 30px rgba(34,211,238,.15)}
.qrbox span{font-size:13px;color:var(--dim);letter-spacing:.5px}