:root{--bg:#f7f7f9;--card:#ffffff;--text:#1b1b1f;--muted:#71717a;--accent:#2563eb;--ok:#16a34a;color-scheme:light dark}@media (prefers-color-scheme:dark){:root{--bg:#101014;--card:#1c1c22;--text:#f4f4f5;--muted:#a1a1aa}}*{box-sizing:border-box;margin:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,Segoe UI,Roboto,sans-serif;max-width:480px;margin:0 auto}.card,body{padding:16px}.card{background:var(--card);border-radius:16px;margin-bottom:12px}.row{display:flex;gap:12px}.row .card{flex:1 1}.muted{color:var(--muted);font-size:14px}.big{font-size:28px;font-weight:700}button.primary{width:100%;padding:14px;border:0;border-radius:12px;background:var(--accent);color:#fff;font-size:16px;font-weight:600}nav{display:flex;gap:16px;margin-bottom:16px}nav a{color:var(--accent);text-decoration:none;font-weight:600}ul.history{list-style:none;padding:0}ul.history li{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--bg)}