=arrow($color)
  border: 1px solid $color
  border-right: 0
  border-top: 0
  content: " "
  display: block
  height: 7px
  pointer-events: none
  position: absolute
  transform: rotate(-45deg)
  width: 7px

=clearfix
  &: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: inline-block
  font-size: $size
  height: $dimensions
  line-height: $dimensions
  text-align: center
  vertical-align: top
  width: $dimensions

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

=placeholder
  $placeholders: ':-moz' ':-webkit-input' '-moz' '-ms-input'
  @each $placeholder in $placeholders
    &:#{$placeholder}-placeholder
      @content

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

=unselectable
  -webkit-touch-callout: none
  -webkit-user-select: none
  -moz-user-select: none
  -ms-user-select: none
  user-select: none

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

=until($device)
  @media screen and (max-width: $device - 1px)
    @content

=mobile
  @media screen and (max-width: $tablet - 1px)
    @content

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

=touch
  @media screen and (max-width: $desktop - 1px)
    @content

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

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