Loupe/data/image-viewer.css

button.circular {
  padding: 9px;
  min-width: 24px;
  min-height: 24px;
}

.image-view {
  background-color: black;
}

.checkerboard picture {
  background-color: #7f7f7f;
  background-image: linear-gradient(
	  45deg,
	  #cccccc 25%,
	  transparent 25%
  ),
  linear-gradient(
	  -45deg,
	  #cccccc 25%,
	  transparent 25%
  ),
  linear-gradient(
	  45deg,
	  transparent 75%,
	  #cccccc 75%
  ),
  linear-gradient(
  	-45deg,
	  transparent 75%,
	  #cccccc 75%
  );
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}