body{font-family:system-ui,-apple-system,Segoe UI,sans-serif;max-width:46rem;
margin:3rem auto;padding:0 1.25rem;line-height:1.7;color:#24292f;background:#fff}
header h1{font-size:1.6rem;font-weight:600;margin-bottom:.5rem}
main p{margin:.9rem 0}
footer{margin-top:3rem;color:#57606a;border-top:1px solid #d0d7de;padding-top:1rem}