:root{font-family:system-ui,sans-serif;color:#172b40;background:#f3f6fa}body{margin:0}header,main,footer{max-width:850px;margin:auto;padding:28px 24px}header{border-bottom:2px solid #0b6c80}nav{display:flex;flex-wrap:wrap;gap:20px;margin-top:18px}a{color:#075c73}main{min-height:55vh}h1{font-size:clamp(2rem,5vw,3rem);line-height:1.15}h2{margin-top:32px;font-size:1.35rem}p,li{font-size:1rem;line-height:1.75}.notice{padding:16px;border-left:4px solid #ab6700;background:#fff1d9}footer{border-top:1px solid #b9cbd8;font-size:.9rem}a:focus-visible{outline:3px solid #ac6300;outline-offset:4px}