html,
body {
  width: 100vw;
  height: 100vw;
  max-width: 1920px;
  max-height: 1080px;
  overflow: hidden;
  margin: 0;
  padding: 0;
}

div#zapp_app_container {
  height: 1080px;
  width: 1920px;
  display: flex;
  flex: 1;
}