:root{--bg:#fafaf7;--fg:#1d1d1b;--muted:#6b6b66;--accent:#1f5fbf}@media (prefers-color-scheme:dark){:root{--bg:#161615;--fg:#ececea;--muted:#9a9a94;--accent:#6ea2f0}}*{box-sizing:border-box}body{background:var(--bg);min-height:100vh;color:var(--fg);place-items:center;margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif;display:grid}main{text-align:center;padding:24px}h1{letter-spacing:-.02em;margin:0 0 8px;font-size:3rem}p{color:var(--muted);margin:0 0 24px}button{font:inherit;border:1px solid var(--accent);background:var(--accent);color:#fff;cursor:pointer;border-radius:8px;padding:10px 20px}button.secondary{color:var(--accent);background:0 0}