.viewer-with-preview {
  display: flex;
  flex-direction: column;

  .viewer {
    display: flex;
    flex-direction: column;
    height: inherit !important;
    flex: 1;

    .html-preview {
      flex: 1;
      display: flex;
      flex-direction: column;

      & iframe {
        flex: 1;
      }
    }
  }
}