:root{color:#1a1a2e;background:#fff;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}body{max-width:60rem;margin:0 auto;padding:1.5rem}header a{color:inherit;font-weight:700;text-decoration:none}footer{color:#555;margin-top:4rem;font-size:.875rem}