// Define arrow
=btn-arrow($dir: '>')
  display: block
  top: 50%
  z-index: 10
  margin-top: -4px
  +transition(transform 0.1s ease-in)
  @extend %icon-sprite

  @if $dir == '>'
    +grid-position-s($right: .4)
    +icon-sprite(0,0,6px,8px)
  @else
    +grid-position-s($left: 0)
    +icon-sprite(8,2,9px,8px)

=btn-lock
  display: block
  top: 50%
  +grid-position-s($left: 0.4)
  z-index: 10
  margin-top: -9px
  @extend %icon-sprite
  +icon-sprite(7,2,12px,16px)