*{box-sizing:border-box}body{margin:0;color:#252525;background:#fff;font:16px/1.65 Arial,sans-serif}a{color:#28435b}header,main,footer{max-width:1060px;margin:auto;padding:20px 24px}header{border-bottom:1px solid #ddd}.brand{font-size:24px;font-weight:bold;text-decoration:none;color:inherit}nav{display:flex;gap:20px;flex-wrap:wrap;margin-top:12px}main{min-height:60vh}h1,h2{line-height:1.25}h1{font-size:clamp(28px,4vw,40px)}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}.card{border:1px solid #ddd;padding:18px}footer{border-top:1px solid #ddd;color:#555}a:focus-visible{outline:3px solid #557;outline-offset:3px}@media(max-width:600px){header,main,footer{padding:16px}nav{gap:12px}}