=clear
  &:after
    clear: both
    content: " "
    display: table

=center($size)
  left: 50%
  margin-left: -($size / 2)
  margin-top: -($size / 2)
  position: absolute
  top: 50%

=fa($size, $dimensions)
  display: block
  font-size: $size
  height: $dimensions
  line-height: $dimensions
  text-align: center
  width: $dimensions

=label($text: "Code", $background: $yellow, $color: rgba(black, 0.5))
  position: relative
  &:before
    background: $background
    color: $color
    content: $text
    display: inline-block
    font-family: $family-sans-serif
    font-size: 0.6rem
    font-weight: 700
    height: 1rem
    left: -1px
    letter-spacing: 0.1em
    line-height: 1rem
    padding: 0 0.5em
    position: absolute
    text-transform: uppercase
    top: 0

=overlay($offset: 0)
  bottom: $offset
  left: $offset
  position: absolute
  right: $offset
  top: $offset

=replace($bg, $w, $h)
  background: $bg center center no-repeat
  background-size: $w $h
  display: block
  height: $h
  outline: none
  overflow: hidden
  text-indent: -290486px
  width: $w

=from($device)
  @media screen and (min-width: $device)
    @content

=until($device)
  @media screen and (max-width: $device)
    @content

=mobile
  @media screen and (max-width: 959px)
    @content

=desktop
  @media screen and (min-width: 960px)
    @content