:root{color-scheme:dark;--bg:#0b1020;--panel:#111827dd;--line:#ffffff22;--text:#f8fafc;--muted:#bac7db;--accent:#fde047;--green:#22c55e;--red:#ef4444;--blue:#38bdf8;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 20% 12%,#7f1d1daa,transparent 27rem),radial-gradient(circle at 80% 20%,#075985aa,transparent 29rem),linear-gradient(145deg,#060914,#111827 55%,#050710);color:var(--text)}.topbar{width:min(1120px,calc(100% - 24px));margin:0 auto;padding:14px 0;display:flex;align-items:center;justify-content:space-between;gap:10px}.home,.pill,.start{min-height:44px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:999px;background:#ffffff12;color:var(--text);text-decoration:none;font-weight:900;padding:0 14px;cursor:pointer}.layout{width:min(1120px,calc(100% - 24px));margin:0 auto 32px;display:grid;grid-template-columns:minmax(300px,700px) minmax(260px,1fr);gap:16px}.arena-card,.panel{border:1px solid var(--line);border-radius:28px;background:var(--panel);box-shadow:0 24px 80px #0008;backdrop-filter:blur(16px);overflow:hidden}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#ffffff20}.stats div{padding:12px;background:#07101fcc}.stats span{display:block;color:var(--muted);font-size:.74rem;letter-spacing:.11em;text-transform:uppercase;font-weight:900}.stats b{font-size:1.25rem}.arena{width:100%;height:min(62vh,520px);min-height:340px;border:0;display:grid;place-items:center;background:radial-gradient(circle,#1e293b,#0f172a);color:var(--text);font-size:clamp(2.6rem,10vw,6.5rem);font-weight:1000;letter-spacing:-.06em;cursor:pointer;touch-action:manipulation;transition:background .12s,transform .12s}.arena.idle{background:radial-gradient(circle,#1e40af,#0f172a)}.arena.wait{background:radial-gradient(circle,#991b1b,#450a0a)}.arena.go{background:radial-gradient(circle,#16a34a,#052e16);transform:scale(1.01)}.arena.done{background:radial-gradient(circle,#854d0e,#1c1917)}.actions{padding:14px;background:#020617aa}.start{width:100%;border-radius:18px;background:linear-gradient(135deg,#f59e0b,#ef4444);font-size:1.05rem}.panel{padding:24px}h1{margin:0 0 10px;font-size:clamp(2.3rem,7vw,4.4rem);line-height:.95;letter-spacing:-.07em}p,li{color:var(--muted);line-height:1.6}.message{margin:18px 0;padding:16px;border:1px solid #ffffff1f;border-radius:18px;background:#ffffff0f;font-weight:900}.message.good{color:#86efac}.message.bad{color:#fca5a5}@media (max-width:860px){.layout{grid-template-columns:1fr}.panel{order:-1}.stats{grid-template-columns:repeat(2,1fr)}.arena{min-height:300px}.topbar{flex-wrap:wrap}}