:root{--bg:#fff;--fg:#1a1a1a;--muted:#6b6b6b;color:var(--fg);background:var(--bg);font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif}@media (prefers-color-scheme:dark){:root{--bg:#121212;--fg:#f2f2f2;--muted:#a0a0a0}}body{background:var(--bg);margin:0}main{max-width:40rem;margin:0 auto;padding:1.5rem 1rem}.muted{color:var(--muted)}