body{
    font-family:Arial,sans-serif;
    background:#f2f2f2;
}

.container{
    width:500px;
    margin:50px auto;
    background:white;
    padding:20px;
    border-radius:10px;
    box-shadow:0 0 10px gray;
}

#chat-box{
    height:300px;
    overflow-y:auto;
    border:1px solid #ccc;
    padding:10px;
    margin-bottom:10px;
}

input{
    width:75%;
    padding:10px;
}

button{
    padding:10px;
}