nukeop/nuclear

.smooth_image_wrapper {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 100%;

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

  .placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    transition: opacity 0.6s ease-in;
  }
}