:root{color-scheme:light dark}
body{max-width:46rem;margin:0 auto;padding:2rem 1.25rem;font:16px/1.65 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
header{display:flex;justify-content:space-between;align-items:baseline;border-bottom:1px solid #8884;padding-bottom:.75rem}
nav a{margin-left:1rem;text-decoration:none}
h1{font-size:1.5rem;margin-top:2rem}
footer{margin-top:3rem;border-top:1px solid #8884;padding-top:.75rem;font-size:.9rem;opacity:.7}