.screen {
  overflow: hidden;
  position: absolute;
  transform-origin: left top;
  top: 50%;
  left: 50%;
  box-shadow: 0px 0px 15px 0px rgba(0,0,0,0.1);
}
.iframe {
  position: absolute;
  border: none;
}
.overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10;
}