=fa
  display: inline-block
  font-family: FontAwesome
  font-style: normal
  font-weight: normal
  line-height: 1
  -webkit-font-smoothing: antialiased
  -moz-osx-font-smoothing: grayscale

=fa-icon($icon: '\f105', $size: 16px 12px, $options: null, $position1:null, $position2: null)
  &:before
    +fa
    content: "#{$icon}"
    @if $position1
      +absolute(if($position1, $position1, null), if($position2, $position2, null))
    @if $size
      +text-block($size, $options)