:root{--bg: #0b1220;--fg: #e8ecf1;--muted: #8b95a7;--accent: #5c9cff;--correct: #2ecc71;--wrong: #e74c3c;--card: #13203a;font-family:system-ui,-apple-system,Segoe UI,Helvetica,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg)}.page{max-width:760px;margin:0 auto;padding:2rem 1rem}.card{background:var(--card);border-radius:12px;padding:1.25rem;margin-bottom:1rem}button{background:var(--accent);color:#fff;border:0;padding:.75rem 1.25rem;border-radius:8px;font-size:1rem;cursor:pointer}button.secondary{background:transparent;border:1px solid var(--muted);color:var(--fg)}button:disabled{opacity:.5;cursor:not-allowed}input,textarea,select{background:#0b1530;color:var(--fg);border:1px solid #243256;padding:.6rem .8rem;border-radius:6px;font-size:1rem;width:100%}h1,h2,h3{margin-top:0}.choice{display:block;width:100%;text-align:left;margin-bottom:.5rem;padding:1rem;background:#1b2a4a;border:2px solid transparent;color:var(--fg);font-size:1rem}.choice.picked{border-color:var(--accent)}.choice.correct{background:#1e4d37;border-color:var(--correct)}.choice.wrong{background:#4d2626;border-color:var(--wrong)}.leaderboard{list-style:none;padding:0}.leaderboard li{display:flex;justify-content:space-between;padding:.6rem .8rem;border-bottom:1px solid #243256}.leaderboard li.me{background:#1b2a4a}.muted{color:var(--muted);font-size:.9rem}