#chat_container
{
            /*position: fixed; 
            bottom: 20px;
            right: 20px;
            width: 300px;
            height: 400px;
            z-index: 9999;*/ 
            position: fixed;
    bottom: 27px;
    right: 20px;
    width: 350px;
    height: 500px;
    z-index: 9999;
    /* border: 1px solid gray;*/

}

 #chatWindow {
    /*width: 350px;
    height: 525px;*/
    width: 100%;
    height: 100%;
    background-color: white;
    border: 1px solid lightgray;
    padding: 1px;
    border-radius: 10px 10px 0px 0px;
   
}

 @media only screen and (max-width: 600px) {
  


#chat_container
{
    position: fixed;
    top:0;
    left:0;
    width: 100%;
    height: 100%;
}

 #chatWindow {
    width: 100%;
    height: 100%;
   
}
}