*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:Verdana, Arial, sans-serif;
}

body{
    background:#f5f5f5;
    color:#222;
    height:100vh;
}

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

.topbar{
    background:#3b7ddd;
    color:white;
    padding:12px 20px;
    border-bottom:1px solid #bdbdbd;
}

.topbar h2{
    font-size:20px;
    font-weight:normal;
}

.messages{
    flex:1;
    overflow-y:auto;
    padding:15px;
    background:white;
}

.message{
    background:#fafafa;
    border:1px solid #dcdcdc;
    padding:10px;
    margin-bottom:10px;
}

.message:hover{
    background:#f0f6ff;
}

.message .name{
    color:#0066cc;
    font-weight:bold;
    margin-bottom:5px;
}

.message .text{
    color:#222;
    word-break:break-word;
}

.bottom{
    display:flex;
    gap:8px;
    padding:12px;
    background:#eeeeee;
    border-top:1px solid #cccccc;
}

.bottom input{
    padding:10px;
    border:1px solid #bdbdbd;
    background:white;
    color:#222;
    outline:none;
}

.bottom input:focus{
    border-color:#3b7ddd;
}

#username{
    width:170px;
}

#message{
    flex:1;
}

.bottom button{
    padding:10px 18px;
    border:1px solid #2d6fc2;
    background:#3b7ddd;
    color:white;
    cursor:pointer;
}

.bottom button:hover{
    background:#2d6fc2;
}

img{
    border-radius:50%;
}