:root{--bg:#fff;--fg:#16181d;--muted:#5b6270;--accent:#1b4dd8;--border:#e2e5ea}@media (prefers-color-scheme:dark){:root{--bg:#101317;--fg:#eef1f5;--muted:#9aa3b2;--accent:#7ea2ff;--border:#262b33}}*{box-sizing:border-box}body{background:var(--bg);color:var(--fg);margin:0;font:16px/1.6 ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif}main{max-width:42rem;margin:0 auto;padding:4rem 1.5rem}h1{letter-spacing:-.02em;margin:0 0 1rem;font-size:2rem;line-height:1.2}p{margin:0 0 1rem}.muted{color:var(--muted);font-size:.9375rem}button{font:inherit;color:#fff;background:var(--accent);cursor:pointer;border:0;border-radius:8px;padding:.75rem 1.5rem;font-weight:600}button[disabled]{opacity:.6;cursor:progress}.error{border:1px solid var(--border);border-radius:8px;padding:.75rem 1rem;font-size:.9375rem}