:root{--bg: #0b0d1c;--surface: #151a33;--line: #2a3057;--ink: #eef1ff;--muted: #9aa3cc;--accent: #7c8cff;--accent-ink: #0b0d1c;color-scheme:dark}@media(prefers-color-scheme:light){:root{--bg: #f5f6fb;--surface: #ffffff;--line: #dfe3f2;--ink: #161a2e;--muted: #5d6488;--accent: #4353d6;--accent-ink: #ffffff;color-scheme:light}}*{box-sizing:border-box}html,body{height:100%;margin:0}body{display:flex;flex-direction:column;background:var(--bg);color:var(--ink);font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;overscroll-behavior:none;touch-action:manipulation}header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:max(8px,env(safe-area-inset-top)) max(12px,env(safe-area-inset-right)) 8px max(12px,env(safe-area-inset-left))}.back{color:var(--muted);text-decoration:none;font-size:.95rem}.back:hover{color:var(--ink)}.hud{margin:0;font-variant-numeric:tabular-nums;font-weight:700}main{position:relative;flex:1;min-height:0;margin:0 max(12px,env(safe-area-inset-left)) max(12px,env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-right))}canvas{display:block;width:100%;height:100%;background:var(--surface);border:1px solid var(--line);border-radius:16px;touch-action:none}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;padding:16px;background:color-mix(in srgb,var(--bg) 72%,transparent);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);border-radius:16px}.overlay[hidden]{display:none}.card{max-width:22rem;padding:24px;text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:0 12px 32px #00000059}.card h1{margin:0 0 8px;font-size:1.6rem}.card p{margin:0 0 16px;color:var(--muted)}.best{font-weight:700;color:var(--ink)}button{font:inherit;font-weight:700;padding:12px 28px;color:var(--accent-ink);background:var(--accent);border:0;border-radius:999px;cursor:pointer}button:hover{filter:brightness(1.08)}.links{display:flex;justify-content:center;gap:16px;margin:16px 0 0}.link{padding:0;color:var(--muted);background:none;font-weight:400;text-decoration:underline}.link:hover{color:var(--ink)}