:root{--bg:#fff;--fg:#16181d;--muted:#6b7280;--line:#e5e7eb;--accent:#1f6feb;--radius:8px}@media (prefers-color-scheme:dark){:root{--bg:#16181d;--fg:#f1f3f5;--muted:#9aa1ab;--line:#2a2e36;--accent:#6ea8ff}}*,:before,:after{box-sizing:border-box}html,body{background:var(--bg);max-width:100%;color:var(--fg);margin:0;font:16px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;overflow-x:hidden}a{color:inherit}.header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:16px;padding:12px 20px;display:flex}.brand{font-weight:600;text-decoration:none}.headerNav{align-items:center;gap:16px;font-size:14px;display:flex}.main{max-width:900px;margin:0 auto;padding:24px 20px 64px}.centered{place-items:center;min-height:100vh;padding:24px;display:grid}.muted{color:var(--muted)}.small{font-size:14px}button,select,input,textarea{font:inherit;color:inherit;border:1px solid var(--line);border-radius:var(--radius);background:0 0;max-width:100%;padding:7px 10px}button{cursor:pointer}button:disabled{opacity:.5;cursor:default}