:root{font-family:system-ui,sans-serif;color:#172438;background:#f6f8fb}body{max-width:760px;margin:auto;padding:44px 24px;line-height:1.7}nav{display:flex;gap:24px;flex-wrap:wrap;border-bottom:1px solid #d8e1ec;padding-bottom:20px}a{color:#244fc0}main{padding:24px 0}h1{font-size:clamp(2rem,6vw,2.8rem);line-height:1.15}h2{font-size:1.25rem;margin-top:32px}footer{border-top:1px solid #d8e1ec;padding-top:20px;color:#526176;font-size:.9rem}:focus-visible{outline:3px solid #244fc0;outline-offset:5px}