body{font:16px/1.6 Arial,sans-serif;color:#18212a;background:white;margin:0}header,main,footer{max-width:960px;margin:auto;padding:20px}header{border-bottom:1px solid #bbb}a{color:#124d82}nav{display:flex;gap:10px 20px;flex-wrap:wrap}.notice{background:#f1f3f5;padding:10px}h1{line-height:1.2}h2{font-size:1.2rem;margin-top:1.6em}dl{margin:0}dt{font-weight:bold;margin-top:22px}dd{margin:4px 0 18px}footer{border-top:1px solid #bbb;margin-top:30px;font-size:.9rem}.directory{columns:2;column-gap:40px}.directory li{break-inside:avoid;margin:6px 0}.skip{position:absolute;left:-10000px}.skip:focus{position:static} @media(max-width:600px){.directory{columns:1}header,main,footer{padding:16px}}