.gallery {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  top: 0;
  width: 100%;
  height: 100%;
}
.gallery-cell {
  width: 100%;
  height: 100%;
  position: relative;
  text-align: center;
  background-size: cover;
  background-position: center center;
  overflow: scroll;
}
.gallery-cell .content-outer-wrapper {
  width: 100%;
  height: 100%;
  position: relative;
  display: table;
}
.gallery-cell .content-wrapper {
  display: table-cell;
  vertical-align: middle;
  height: 100%;
  width: 100%;
}
.gallery-cell .content {
  max-width: 900px;
  padding: 0 20px;
  margin: 0 auto;
}
