selfprivacy.org/_vendor/github.com/google/docsy/assets/scss/_drawio.scss

div.drawio {
  display: inline-block;
  position: relative;

  button {
    @extend .btn;
    @extend .btn-outline-primary;
    position: absolute;
    bottom: 5px;
    right: 5px;
    padding: 0.4em 0.5em;
    font-size: 0.8em;
    display: none;
  }

  &:hover button {
    display: inline;
  }
}

div.drawioframe {
  position: fixed;
  height: 100%;
  width: 100%;
  top: 0;
  left: 0px;
  z-index: 1000;
  background: #000b;
  border: 0;

  iframe {
    position: absolute;
    height: 90%;
    width: 90%;
    top: 5%;
    left: 5%;
    z-index: 1010;
  }
}