.container {
  position: relative;
  width: 60%;
  height: 1100px;
}

.livePreviewWrapper {
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  overflow: auto;

  iframe {
    width: 100%;
    height: 100%;
  }
}

.container {
  position: relative;
  width: 60%;
}

.livePreviewWrapper {
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  overflow: auto;

  iframe {
    width: 100%;
    height: 100%;
  }
}

Make preview area's height dynamic
Make preview area's height dynamic
