:root{--bg:#0f1220;--bg-elevated:#171b2e;--border:#2a2f4a;--text:#f2f3f8;--text-dim:#9aa0c0;--accent:#7c5cff;--accent-2:#22d3ee;--success:#34d399;--danger:#f87171;--warning:#fbbf24;--radius:12px}*{box-sizing:border-box}body,html{padding:0;margin:0;background:var(--bg);color:var(--text);font-family:Segoe UI,system-ui,-apple-system,sans-serif}a{color:inherit}button{font-family:inherit;cursor:pointer}.container{max-width:960px}.container,.container-narrow{margin:0 auto;padding:24px 16px 64px}.container-narrow{max-width:480px}.card{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:16px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--accent);color:#fff;border:none;border-radius:8px;padding:12px 20px;font-size:15px;font-weight:600;transition:opacity .15s}.btn:hover{opacity:.9}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:transparent;border:1px solid var(--border);color:var(--text)}.btn-danger{background:var(--danger)}.btn-block,.input{width:100%}.input{padding:12px 14px;border-radius:8px;border:1px solid var(--border);background:#0c0e1a;color:var(--text);font-size:15px}.input:focus{outline:2px solid var(--accent)}label{display:block;font-size:13px;color:var(--text-dim);margin-bottom:6px;margin-top:14px}h1,h2,h3{margin:0 0 12px}.text-dim{color:var(--text-dim)}.error-box{background:hsla(0,91%,71%,.12);border:1px solid var(--danger);color:var(--danger);border-radius:8px}.error-box,.success-box{padding:10px 14px;margin:12px 0;font-size:14px}.success-box{background:rgba(52,211,153,.12);border:1px solid var(--success);color:var(--success);border-radius:8px}.checklist{list-style:none;padding:0;margin:8px 0 0;font-size:13px}.checklist li{padding:3px 0;color:var(--text-dim)}.checklist li.ok{color:var(--success)}.navbar{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;border-bottom:1px solid var(--border)}.navbar a{text-decoration:none}.brand{font-weight:800;font-size:20px;background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}.nav-links{display:flex;gap:20px;align-items:center;font-size:14px}table{width:100%;border-collapse:collapse;font-size:14px}td,th{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border)}.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;background:var(--bg);border:1px solid var(--border)}.grid-2{display:grid;grid-template-columns:1fr 1fr;grid-gap:16px;gap:16px}@media (max-width:640px){.grid-2{grid-template-columns:1fr}}.buzzer-btn{width:100%;aspect-ratio:1;max-width:320px;margin:32px auto;display:flex;align-items:center;justify-content:center;border-radius:50%;border:none;font-size:28px;font-weight:800;color:#fff;background:radial-gradient(circle at 30% 30%,#ff6b6b,#b91c1c);box-shadow:0 10px 30px rgba(185,28,28,.5)}.buzzer-btn:disabled{background:#3a3f5c;box-shadow:none;opacity:.6}.buzzer-btn:active:not(:disabled){transform:scale(.96)}.center{text-align:center}.rank-row{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--border)}.rank-row.self{color:var(--accent-2);font-weight:700}