:root{--bg: #0b0d12;--bg-elev: #161a23;--bg-elev-2: #1f2433;--fg: #e8ecf3;--fg-dim: #98a0b3;--accent: #7c5cff;--accent-2: #4fd0c4;--good: #4ade80;--warn: #f59e0b;--bad: #ef4444;--border: #2a3046;--shadow: 0 12px 40px rgba(0, 0, 0, .4);--tile-bg: linear-gradient(140deg, #7c5cff 0%, #4fd0c4 100%);--tile-fg: #ffffff;--bg-pattern: radial-gradient(rgba(124, 92, 255, .08) 1px, transparent 1px);--bg-pattern-size: 24px 24px}:root[data-theme=light]{--bg: #f5f6fb;--bg-elev: #ffffff;--bg-elev-2: #eef0f7;--fg: #1b1f2a;--fg-dim: #5b6376;--accent: #6246ea;--accent-2: #1aa394;--good: #16a34a;--warn: #d97706;--bad: #dc2626;--border: #d8dce8;--shadow: 0 8px 30px rgba(20, 20, 50, .12);--tile-bg: linear-gradient(140deg, #6246ea 0%, #1aa394 100%);--tile-fg: #ffffff;--bg-pattern: radial-gradient(rgba(98, 70, 234, .12) 1px, transparent 1px);--bg-pattern-size: 24px 24px}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;background:var(--bg);color:var(--fg);background-image:var(--bg-pattern);background-size:var(--bg-pattern-size);transition:background-color .3s ease,color .3s ease;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit}input,textarea,select{font-family:inherit;background:var(--bg-elev);color:var(--fg);border:1px solid var(--border);border-radius:10px;padding:10px 12px;font-size:14px;outline:none;transition:border-color .15s ease,box-shadow .15s ease}input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px #7c5cff33}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:12px;border:1px solid var(--border);background:var(--bg-elev);color:var(--fg);cursor:pointer;font-weight:600;font-size:14px;transition:transform .08s ease,background-color .15s ease,border-color .15s ease,box-shadow .15s ease}.btn:hover{border-color:var(--accent);background:var(--bg-elev-2)}.btn:active{transform:translateY(1px)}.btn-primary{background:linear-gradient(140deg,var(--accent) 0%,var(--accent-2) 100%);color:#fff;border-color:transparent;box-shadow:0 10px 30px #7c5cff59}.btn-primary:hover{background:linear-gradient(140deg,var(--accent) 0%,var(--accent-2) 100%);filter:brightness(1.05)}.btn-danger{background:var(--bad);color:#fff;border-color:transparent}.btn-ghost{background:transparent}.card{background:var(--bg-elev);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);padding:20px}.app-shell{min-height:100%;display:flex;flex-direction:column}.app-header{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;padding:14px 24px;background:color-mix(in srgb,var(--bg) 80%,transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.app-header .brand{font-weight:800;letter-spacing:-.02em;font-size:18px;background:linear-gradient(120deg,var(--accent) 0%,var(--accent-2) 100%);-webkit-background-clip:text;background-clip:text;color:transparent}.app-header .controls{display:flex;align-items:center;gap:10px}.app-main{flex:1;padding:24px;max-width:1200px;width:100%;margin:0 auto}.landing-grid{display:grid;grid-template-columns:320px 1fr;gap:24px;align-items:start}@media (max-width: 800px){.landing-grid{grid-template-columns:1fr}}.leaderboard{position:sticky;top:80px}.leaderboard h3{margin:0 0 12px;font-size:14px;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-dim)}.leaderboard ol{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:6px}.leaderboard li{display:grid;grid-template-columns:28px 1fr auto;align-items:center;gap:10px;padding:8px 10px;border-radius:10px;background:var(--bg-elev-2)}.leaderboard .rank{font-weight:800;color:var(--accent)}.leaderboard .you{outline:1px solid var(--accent)}.leaderboard .count{font-variant-numeric:tabular-nums;font-weight:700;color:var(--fg)}.leaderboard .meta{font-size:12px;color:var(--fg-dim)}.hero{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:60px 24px}.hero h1{font-size:clamp(36px,6vw,64px);margin:0 0 12px;letter-spacing:-.03em;background:linear-gradient(120deg,var(--accent) 0%,var(--accent-2) 100%);-webkit-background-clip:text;background-clip:text;color:transparent}.hero p{color:var(--fg-dim);font-size:18px;margin:0 0 32px}.hero .big-play{font-size:22px;padding:22px 40px;border-radius:999px;box-shadow:0 18px 60px #7c5cff80}.auth-page{display:flex;justify-content:center;align-items:center;min-height:calc(100vh - 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