:root{--bg:#0b0d12;--bg-alt:#12151c;--surface:#171a22;--surface-hover:#1e222c;--border:#252a35;--text:#e6e9ef;--text-dim:#9aa3b2;--accent:#6ea8fe;--good:#4ade80;--warn:#facc15;--bad:#f87171;--radius:14px}*{box-sizing:border-box}body,html{padding:0;margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-tap-highlight-color:transparent}a{color:inherit}button,input,select,textarea{font:inherit;color:inherit}.container{padding:16px 16px 64px}.container,.topbar{max-width:480px;margin:0 auto}.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--border)}.topbar a.brand{text-decoration:none;font-weight:700;font-size:1.05rem;color:var(--text)}.topbar .user{font-size:.82rem;color:var(--text-dim);display:flex;align-items:center;gap:10px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;margin-bottom:14px}.card:hover{border-color:var(--accent)}.field{margin-bottom:14px}.field label{display:block;font-size:14px;color:var(--text-dim);margin-bottom:6px}.field input[type=password],.field input[type=text]{width:100%;background:var(--bg-alt);border:1px solid var(--border);border-radius:8px;padding:12px;font-size:16px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--accent);color:#0b0d12;border:none;border-radius:8px;padding:13px 18px;font-size:15px;font-weight:700;cursor:pointer;text-decoration:none}.btn.block{width:100%}.btn.secondary{background:var(--bg-alt);color:var(--text);border:1px solid var(--border)}.btn.small{padding:8px 12px;font-size:13px;font-weight:600}.btn:disabled{opacity:.6;cursor:default}.error{background:hsla(0,91%,71%,.12);border:1px solid var(--bad);color:#fecaca;padding:10px 12px;border-radius:8px;margin-bottom:12px;font-size:14px}.muted{color:var(--text-dim)}.center{text-align:center}table.leaderboard{width:100%;border-collapse:collapse;font-size:14px}table.leaderboard td,table.leaderboard th{text-align:left;padding:8px 6px;border-bottom:1px solid var(--border)}table.leaderboard th{color:var(--text-dim);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.03em}