#live_chat_iframe {
  position: fixed;
  height: 400px;
  width: 300px;
  right: 10px;
  bottom: 10px;
  display: none;
  -webkit-box-shadow: 0 4px 5px -1px rgba(0, 0, 0, 0.5);
  -moz-box-shadow: 0 4px 5px -1px rgba(0, 0, 0, 0.5);
  box-shadow: 0 4px 5px -1px rgba(0, 0, 0, 0.5);
  z-index: 1000000000000;
}
.live_chat_iframe-close-button {
  display: block;
  position: absolute;
  color: #fff;
  right: 0;
  top: 0;
  width: 55px;
  height: 55px;
  z-index: 1000;
  background-color: black;
  border: none;
  font-size: 25px;
  line-height: 25px;
}
@media only screen and (max-device-width: 480px) {
  .live_chat_iframe-close-button {
    font-size: 35px;
    line-height: 35px;
  }
}