:root{--rs-color-bg:#fff;--rs-color-fg:#111827;--rs-color-muted:#6b7280;--rs-color-brand:#0f766e;--rs-radius:.75rem;--rs-font-sans:system-ui, -apple-system, "Segoe UI", Roboto, sans-serif}@media (prefers-color-scheme:dark){:root{--rs-color-bg:#0b1120;--rs-color-fg:#f3f4f6;--rs-color-muted:#9ca3af}}body{font-family:var(--rs-font-sans);background:var(--rs-color-bg);color:var(--rs-color-fg);margin:0}.shell{max-width:40rem;margin:0 auto;padding:2rem 1rem}