body{color:#222;background:#fff;max-width:700px;margin:auto;padding:2rem;font-family:Arial,sans-serif;position:relative}.close-button{cursor:pointer;background:0 0;border:none;font-size:1.5rem;position:fixed;top:1rem;right:1rem}h1{margin-bottom:1rem;font-size:1.5rem}h2{margin-top:1.5rem;font-size:1.1rem}p{line-height:1.5}a{color:#06c;text-decoration:none}a:hover{text-decoration:underline}