=control($background, $border, $color)
  -moz-appearance: none
  -webkit-appearance: none
  background: $background
  border: 1px solid $border
  border-radius: $radius
  color: $color
  display: inline-block
  font-size: 16px
  height: 32px
  line-height: 20px
  padding: 4px 10px 6px
  position: relative
  vertical-align: top
  &:active,
  &:focus
    outline: none

=control--small
  font-size: 12px
  height: 32px
  padding: 4px 8px 6px

=control--medium
  font-size: 16px
  height: 40px
  padding: 8px 10px 10px

=control--large
  font-size: 20px
  height: 60px
  padding: 18px 30px 20px