$checkbox-size           ?= $generic-input-size
$checkbox-border-radius  ?= 50%
$checkbox-border-width   ?= $generic-input-border-width
$checkbox-tick-thickness ?= 2px

$checkbox-tick-top        = ($checkbox-size / 6)
$checkbox-tick-left       = ($checkbox-size / 6)
$checkbox-tick-width      = (.26 * $checkbox-size)
$checkbox-tick-height     = (.55 * $checkbox-size)

.quasar-checkbox
  display inline-block
  height ($checkbox-size + $checkbox-border-width)
  width ($checkbox-size + $checkbox-border-width)
  vertical-align middle

  input
    display none !important

  input + div
    position relative

    &:before
      border $checkbox-border-width solid $form-darker-color
    &:before, &:after
      content ''
      position absolute
      top 0
      left 0
      width $checkbox-size
      height $checkbox-size
      transition all .3s ease
      border-radius $checkbox-border-radius

  input:checked + div
    &:before
      background $form-active-color
      border $checkbox-border-width solid $form-active-color
    &:after
      top $checkbox-tick-top
      left $checkbox-tick-left
      width $checkbox-tick-width
      height $checkbox-tick-height
      border-top none
      border-left none
      border-right $checkbox-tick-thickness solid white
      border-bottom $checkbox-tick-thickness solid white
      transform rotate(45deg)
      transform-origin 100% 100%
      border-radius 0

  for $name, $color in $colors
    &.{$name} input:checked + div:before
      background $color
      border-color $color