body{font:17px/1.6 -apple-system,system-ui,sans-serif;max-width:42rem;margin:3rem auto;padding:0 1.25rem;color:#1d1d1f}
h1{font-size:1.6rem;margin-bottom:.25rem}h2{font-size:1.15rem;margin-top:2rem}
nav{margin:1rem 0 2rem;font-size:.95rem}nav a{margin-right:1rem}
footer{margin-top:3rem;font-size:.85rem;color:#666}