html.visitor-channel-active,
html.visitor-channel-active body {
  overflow: hidden !important;
}

#visitor-channel-shell {
  position: fixed;
  inset: 0;
  z-index: 2147483000;
  width: 100%;
  height: 100%;
  background: #fff;
}

#visitor-channel-frame {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}