:root{--bg: #0a0b12;--card: #12131d;--ink: #f3e9d2;--ink-dim: #a9a08a;--gold: #f5c344;--line: rgba(245, 195, 68, .16)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,Segoe UI,Roboto,sans-serif}.page{max-width:720px;margin:0 auto;padding:32px 20px 64px}.page-header h1{font-size:28px;margin:8px 0}.eyebrow{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--gold)}.dim{color:var(--ink-dim)}.crumb{color:var(--ink-dim);text-decoration:none;display:inline-block;margin-bottom:16px}.cards{display:flex;gap:16px;margin:24px 0}.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px 20px;flex:1}.card-label{font-size:12px;color:var(--ink-dim)}.card-value{font-size:28px;color:var(--gold)}.btn{display:inline-block;background:var(--gold);color:#1a1400;padding:10px 18px;border-radius:8px;text-decoration:none;font-weight:600;margin-top:8px}.linklike{background:none;border:none;color:var(--ink-dim);text-decoration:underline;cursor:pointer;padding:0;font:inherit}.hall{margin:32px 0}.problem-card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px;margin-bottom:12px}.problem-card.solved{opacity:.6}.problem-topic{font-size:12px;color:var(--gold);text-transform:uppercase}.solved-mark{color:var(--gold);font-weight:600}.answer-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.answer-row input{background:var(--bg);border:1px solid var(--line);color:var(--ink);padding:8px 10px;border-radius:6px}.answer-row button{background:var(--gold);border:none;padding:8px 14px;border-radius:6px;font-weight:600;cursor:pointer}.error{color:#e0654b;font-size:13px}.final-door{border:1px solid var(--line);border-radius:10px;padding:20px;text-align:center}.final-door.open{border-color:var(--gold)}.final-door.closed{opacity:.6}.history-table{width:100%;border-collapse:collapse;margin-top:16px}.history-table th,.history-table td{text-align:left;padding:8px 12px;border-bottom:1px solid var(--line)}.auth-stage{min-height:100vh;display:flex;align-items:center;justify-content:center}.auth-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:32px;display:flex;flex-direction:column;gap:12px;width:min(360px,90vw)}.auth-card input{background:var(--bg);border:1px solid var(--line);color:var(--ink);padding:10px 12px;border-radius:6px}.auth-card button{background:var(--gold);border:none;padding:10px;border-radius:6px;font-weight:600;cursor:pointer}.auth-card a{color:var(--ink-dim);font-size:13px;text-align:center}