zhdk/madek

.tristate-checkbox-container
  position: relative
  input[type=checkbox]
    margin: 0
    padding: 0
    position: relative
    top: 0
    left: 0
    +dimension(14px, 14px)

.tristate-checkbox-mixed-value
  +background(black)
  +dimension(6px, 2px)
  position: absolute
  top: 4px
  left: 0
  margin: 5px
  display: block
  +border-radius(2px)