.fill-holder
  position: relative
  overflow: hidden
  height: 100%
  vertical-align: middle

img
  display: block
  border: none

  &.fit-horizontal
    width: 100%

  &.fit-vertical
    height: 100%

  &.fill
    position: absolute

  &.preload
    opacity: 0
    +transition(opacity 300ms ease-out)

    &.loaded
      opacity: 1