body{font-family:Arial,sans-serif;margin:0;color:#333}header{background:#0b63ce;color:#fff;padding:40px;text-align:center}.btn{background:#fff;color:#0b63ce;padding:10px 18px;text-decoration:none;border-radius:4px;font-weight:bold}main{max-width:900px;margin:auto;padding:20px}h2{color:#0b63ce}footer{background:#222;color:#fff;text-align:center;padding:15px}