:root{font:17px/1.75 system-ui,sans-serif;color:#253348;background:#f7f8fa}body{margin:0}main{max-width:720px;margin:48px auto;padding:0 24px}nav,footer{font-size:14px;color:#65748b}a{color:#245d9b;text-underline-offset:3px}h1{font-size:34px;line-height:1.3;margin:44px 0 16px}h2{font-size:21px;margin:0 0 8px}article{padding:24px 0;border-bottom:1px solid #dfe4eb}p{margin:8px 0}footer{margin:40px 0}@media(max-width:480px){main{margin:24px auto}h1{font-size:28px}}