.popover
  z-index: $popoverLevelZIndex
  position: absolute
  top: 0
  right: @top
  bottom: @right
  left: @bottom
  width: 100%
  height: @width
  outline: none
  &.noBackdrop
    width: auto
    height: auto
    right: auto
    bottom: auto

  > .backdrop
    opacity: 0
    transition: transitOpacity()

  > .content
    position: absolute
    box-sizing: border-box