body{font-family:Arial;margin:0}header,footer{background:#0b3b75;color:#fff;padding:20px}nav a{color:#fff;margin-right:12px}section{padding:30px}.hero{background:#eef5ff;padding:50px;text-align:center}.btn{background:#0b3b75;color:#fff;padding:10px 16px;text-decoration:none}