body{background-color:#f4f4f4;color:#333;font-family:Arial,sans-serif;line-height:1.6;margin:0;padding:0}.container{background-color:#fff;box-shadow:0 0 10px rgba(0,0,0,.1);margin:20px auto;overflow:hidden;padding:20px;width:80%}h1{color:#333}.back-button,.content{margin-top:20px}.back-button{background-color:#333;color:#fff;display:inline-block;padding:10px 20px;text-decoration:none}.back-button:hover{background-color:#555}