.collage-item {
  box-shadow: 0 2px 6px rgba(0,0,0,0.16), 0 2px 6px rgba(0,0,0,0.23);
  padding: 15px;
  margin-bottom: 30px;
}

.collage-item .collage-item-image {
  position: relative;
  margin: 0px 0px 10px 0px;
  box-shadow: 0 0px 3px rgba(0,0,0,0.12), 0 0px 2px rgba(0,0,0,0.24);
  width: 100%;
  overflow: hidden;
}

.collage-item.collage-item-wide .collage-item-image {
  width: 25%;
  max-width: 175px;
  min-width: 125px;
  float: left;
  margin-right: 15px;
  margin-bottom: 15px;
}

.collage-item .collage-item-image .collage-item-image-helper-outer {
  position: relative;
  padding-bottom: 62.5%;
  width: 100%;
}

.collage-item.collage-item-wide .collage-item-image .collage-item-image-helper-outer {
  position: relative;
  padding-bottom: 100%;
  width: 100%;
}

.collage-item .collage-item-image .collage-item-image-helper-inner {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  overflow: hidden;
  background-position: center center;
  background-size: cover;
}