body{background-color:#000;color:#fff;font-family:Arial,sans-serif;margin:0;padding:0;height:100vh;display:flex;align-items:center;justify-content:center}.container{text-align:center}#conversation{margin-top:20px}#messages{background-color:#111;padding:10px;margin-bottom:10px;height:300px;width:80%;margin-left:auto;margin-right:auto;overflow-y:auto;border-radius:10px;border:1px solid #333}#input{width:70%;padding:10px;border-radius:10px;border:1px solid #555;margin-bottom:10px}button{padding:10px 20px;border-radius:10px;border:none;background-color:#444;color:#fff;cursor:pointer}button:hover{background-color:#666}