body{font-family:system-ui,-apple-system,sans-serif;background:#f4f7f9;color:#223343;line-height:1.7;margin:0}header,main,footer{max-width:810px;margin:auto;padding:24px}header{border-bottom:2px solid #d9e2e9}a{color:#176b87}h1{font-size:2rem}section{background:white;padding:20px 27px;border-radius:10px;margin:18px 0;box-shadow:0 2px 12px #0001}footer{color:#567}