// Box Sizing // ==========

// Box Sizing // ———- // Check for an existing support mixin, or provide a simple fallback. // - $model: <box-sizing> @mixin susy-box-sizing(

$model: content-box

) {

@if $model {
  @if susy-support(box-sizing, (mixin: box-sizing), $warn: false) {
    @include box-sizing($model);
  } @else {
    $prefix: (moz, webkit, official);
    @include susy-prefix(box-sizing, $model, $prefix);
  }
}

}