:root{color-scheme:light dark;--fg:#1a1a1a;--bg:#ffffff;--muted:#5c5c5c;--accent:#1a4fd6}@media (prefers-color-scheme:dark){:root{--fg:#ededed;--bg:#121212;--muted:#a1a1a1;--accent:#7aa2ff}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,Segoe UI,sans-serif}main{max-width:34rem;margin:0 auto;padding:4rem 1.5rem}h1{font-size:2rem;margin:0 0 .5rem}p.tagline{color:var(--muted);margin:0 0 2rem}button{font:inherit;padding:.6rem 1.1rem;border:1px solid var(--accent);border-radius:6px;background:var(--accent);color:#fff;cursor:pointer}button.secondary{background:transparent}a,button.secondary{color:var(--accent)}