*{box-sizing:border-box}body{margin:0;background:#0b1220;color:#e5e7eb;font-family:system-ui,sans-serif}main{width:min(960px,calc(100% - 24px));margin:24px auto}.back{color:#86efac}h1{margin-bottom:4px}.game-shell{position:relative;border:1px solid #334155;border-radius:14px;overflow:hidden;background:#111827}.hud{display:flex;justify-content:space-around;padding:10px;background:#172033}canvas{display:block;width:100%;height:auto;cursor:crosshair}.overlay{position:absolute;inset:44px 0 0;display:flex;flex-direction:column;gap:14px;align-items:center;justify-content:center;background:#0b1220d9}.overlay.hidden{display:none}input,button{font:inherit;padding:10px 14px;border-radius:8px;border:1px solid #475569}button{background:#22c55e;color:#052e16;font-weight:700;cursor:pointer}.leaderboard{margin-top:20px;padding:16px;background:#111827;border-radius:14px}.leaderboard li{padding:5px}footer{text-align:center;color:#94a3b8;padding:24px}@media(max-width:600px){main{margin-top:12px}.hud{font-size:14px}}