:root{--bg:#0f172a;--panel:#111827;--ink:#f8fafc;--muted:#cbd5e1;--gold:#facc15;--green:#22c55e;--red:#ef4444}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;background:radial-gradient(circle at top,#1e3a8a 0,#0f172a 48%,#020617 100%);color:var(--ink);min-height:100vh}.shell{width:min(1040px,100%);margin:0 auto;padding:24px}.intro{display:grid;gap:10px;margin:0 0 18px}.eyebrow{letter-spacing:.14em;text-transform:uppercase;font-weight:900;color:var(--gold);font-size:.78rem;margin:0}.intro h1{font-size:clamp(2.2rem,8vw,4.8rem);line-height:.95;margin:0}.intro p{max-width:720px;color:var(--muted);font-size:1.08rem}.controls{display:flex;flex-wrap:wrap;gap:10px}.controls span,.hud-note{border:1px solid rgba(255,255,255,.16);background:rgba(15,23,42,.72);border-radius:999px;padding:9px 13px;color:#e2e8f0;font-weight:800}.game-card{background:rgba(15,23,42,.76);border:1px solid rgba(255,255,255,.14);border-radius:24px;padding:14px;box-shadow:0 24px 80px rgba(0,0,0,.38)}#game{min-height:420px;display:grid;place-items:center}canvas{max-width:100%;height:auto;border-radius:18px;box-shadow:0 18px 60px rgba(0,0,0,.42)}.hud-note{display:inline-flex;margin-top:12px;border-radius:14px}@media(max-width:680px){.shell{padding:14px}.game-card{padding:8px}.intro p{font-size:1rem}}