=valign-parent
  white-space: nowrap
  text-align: center

  // balance div
  &::before
    content: ''
    display: inline-block
    height: 100%
    vertical-align: middle
    margin-right: -0.25em

=valign-child
  display: -moz-inline-box
  display: inline-block
  vertical-align: middle
  white-space: normal
  text-align: left

.valign-parent
  +valign-parent

.valign-child
  +valign-child


/*
  =valign-parent
    height: 100%

    // balance div
    &::before
      display: -moz-inline-box
      display: inline-block
      vertical-align: middle
      content: ''
      height: 100%

  =valign-child
    display: -moz-inline-box
    display: inline-block
    vertical-align: middle

  .valign-parent
    +valign-parent

  .valign-child
    +valign-child