.gbg, .obg, .rbg {
  background-color: transparent;
  text-align: center;
  vertical-align: middle;
  width: auto;
  height: auto;
}

.gbg img, .gbg img, .gbg img {
  width: 25%;
}

@media print
{
  .gbg img, .gbg img, .gbg img {
    width: 1cm;
  }
}