// Box Sizing
// ==========
// Susy is not in the business of handling css3 prefixed feature support.
// If you provide a mixin, we'll use yours, otherwise we provide basics.
// If you want more powerful support handling, we recommend compass-style.org

// Susy Box Sizing
// ---------------
// [$model]: content-box | border-box
@mixin susy-box-sizing(
  $model: content-box
) {
  -moz-box-sizing: $model;
  -webkit-box-sizing: $model;
  box-sizing: $model;
}