:root{font-family:system-ui,sans-serif;color:#202c40;background:#f7f8fa;font-size:18px;line-height:1.65}body{margin:0}header,main,footer{max-width:850px;margin:auto;padding:2rem 1.5rem}header{border-bottom:2px solid #204d70}header>a{font-weight:700;font-size:1.3rem}nav{display:flex;gap:1.2rem;flex-wrap:wrap;margin-top:1rem}a{color:#174f79;text-underline-offset:.2em}a:focus-visible{outline:3px solid #b65122;outline-offset:4px}h1{font-size:2.2rem;line-height:1.2}h2{font-size:1.25rem;margin-top:2rem}footer{font-size:.8rem;border-top:1px solid #bac4d0}@media(max-width:500px){header,main,footer{padding:1.3rem}h1{font-size:1.8rem}}