body {
background: #e0e0e0;
font-family: Tahoma;
}


.chat-box {
width: 420px;
margin: 40px auto;
background: white;
padding: 15px;
border: 2px solid #999;
}


#messages {
height: 260px;
overflow-y: auto;
border: 1px solid #aaa;
padding: 5px;
background: #f9f9f9;
white-space: pre-line;
}


input, button {
width: 100%;
margin-top: 5px;
padding: 6px;
}