.imageSet .image {
  position: absolute;
  width: 100%;
  height: 100%;
  background-size: cover !important;
  background-position: center;
}
.imageSet[data-slide="true"] .image:not(:only-child) {
  opacity: 0;
  transition-duration: 1s;
}
.imageSet[data-slide="true"] .image:not(:only-child).visible {
  opacity: 1;
}