diffWidget.css

.diffWidget {
  border: 2px solid rgba(0,0,0, 0.3);
  padding: 5px;
}

.diffWidget .wrapper {
  width: 100%;
  height: 100%;
  position: relative;
  z-index: 1;
}

.diffWidget .first {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: 3;
  top: 0;
  left: 0;

  border-right: 1px solid rgba(0, 0, 0, 0.3);
}

.diffWidget .second {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: 2;
  top: 0;
  left: 0;
}