centerer($d = both)
  position: absolute
  if $d == both or $d == b
    top: 50%
    left: 50%
    transform: translate(-50%, -50%)
  else if $d == horizontal or $d == h
    left: 50%
    transform: translate(-50%, 0)
  else if $d == vertical or $d == v
    top: 50%
    transform: translate(0, -50%)

centerer-remove($p = relative)
  position: $p
  top: auto
  left: auto
  transform: translate(0, 0)