body{
    margin:0;
    font-family:Arial;
    background:#111;
    color:#fff;
}

.chat-box{
    display:flex;
    flex-direction:column;
    height:100vh;
}

.chat-header{
    background:#222;
    padding:10px;
    text-align:center;
    font-weight:bold;
}

#messages{
    flex:1;
    overflow-y:auto;
    padding:10px;
}

.msg{
    background:#1e1e1e;
    padding:8px;
    margin-bottom:8px;
    border-radius:8px;
}

.chat-form{
    display:flex;
    padding:10px;
    background:#222;
}

.chat-form input{
    flex:1;
    padding:8px;
}

.chat-form button{
    padding:8px 12px;
    margin-left:5px;
}