#hcs-chat-btn{
    background:#25D366;
    color:#fff;
    padding:12px 20px;
    border:none;
    border-radius:6px;
    cursor:pointer;
    font-size:16px;
}

#hcs-chat-popup{
    display:none;
    position:fixed;
    bottom:20px;
    right:20px;
    width:350px;
    background:#fff;
    border:1px solid #ddd;
    border-radius:10px;
    box-shadow:0 0 15px rgba(0,0,0,.2);
    z-index:99999;
}

#hcs-chat-header{
    background:#25D366;
    color:#fff;
    padding:12px;
    font-weight:bold;
}

#hcs-chat-body{
    padding:15px;
    height:250px;
    overflow:auto;
}

#hcs-chat-footer{
    padding:10px;
}

#hcs-message{
    width:100%;
    height:70px;
}