body {font-family: Arial;background:#111;color:#fff;margin:0}
header{background:#b30000;padding:30px;text-align:center}
.btn{background:#000;color:#fff;padding:10px 20px;text-decoration:none;border-radius:5px}
section{padding:20px}
footer{text-align:center;padding:10px;background:#000}