body{font-family:Arial,Helvetica,sans-serif;margin:0;color:#223;background:#f7f9fa}header{background:#0e4d5c;color:#fff;padding:18px 28px}header h1{margin:0;font-size:24px}nav a{color:#cfeef5;margin-right:16px;text-decoration:none}main{max-width:860px;margin:0 auto;padding:28px 20px}section{background:#fff;border:1px solid #dde6e9;border-radius:10px;padding:20px;margin-bottom:18px}h2{color:#0e4d5c;margin-top:0}footer{padding:20px;text-align:center;color:#667}