:root{--background:#ffffff;--foreground:#12151a;--muted:#5c6673;--accent:#1f6feb;--surface:#f4f6f8;--border:#e2e6ea}@media (prefers-color-scheme:dark){:root{--background:#0e1116;--foreground:#f2f4f7;--muted:#98a2b0;--accent:#4f95ff;--surface:#171c23;--border:#262d36}}*{box-sizing:border-box}body{margin:0;background:var(--background);color:var(--foreground);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}main{max-width:34rem;margin:0 auto;padding:4rem 1.5rem}h1{font-size:2rem;letter-spacing:-.02em;margin:0 0 .5rem}p{color:var(--muted);margin:0 0 1rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.5rem;margin-top:2rem}