header{color:#fff;text-align:center;background-color:#333;padding:20px 0}h1{font-size:28px}section{background-color:#fff;border:1px solid #ddd;margin:20px;padding:20px}h2{font-size:24px}ul{margin-left:20px;list-style-type:disc}p{font-size:16px;line-height:1.5}