body{font-family:Arial,sans-serif;line-height:1.6;margin:20px;padding:20px;background-color:#f9f9f9}h1,h2,h3{color:#333}.container{max-width:800px;margin:auto;background:#fff;padding:20px;border-radius:10px;box-shadow:0 0 10px rgba(0,0,0,.1)}ul{padding-left:20px}.highlight{background:#ffeb99;padding:5px;border-radius:5px}