*{box-sizing:border-box}body{margin:0;font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:#222;background:#fafafa}
header{padding:48px 24px 24px;background:#fff;border-bottom:1px solid #e5e5e5}
h1{margin:0;font-size:28px;letter-spacing:.5px}
header p{margin:4px 0 0;color:#666}
main{max-width:720px;margin:0 auto;padding:24px}
ul{padding-left:20px}li{margin:6px 0}
footer{max-width:720px;margin:0 auto;padding:24px;color:#888;font-size:14px}