gistfile1.sass

$buttons-sprite-dimensions: true;
$buttons-layout:horizontal;
@import "buttons/*.png";
$buttons-sprites: sprite-map("buttons/*.png");


@each $icon in 'text-link', 'picture', 'video' {
  label[for=edit-field-article-type-und-#{$icon}]{
    @include buttons-sprite(#{$icon}_big);
    &.active {
      //background-position: sprite-position($buttons-sprites, #{$icon}_big_hover);
      @include buttons-sprite(#{$icon}_big_hover);
    }
  }
}