s-type">[function]</span> <a href="#undefined-function-calc-gutter-width"><code>calc-gutter-width</code></a></li><li><span class="item__cross-type">[mixin]</span> <a href="#undefined-mixin-collapse"><code>collapse</code></a></li></ul></section><section class="main__item container item" id="undefined--variable-breakpoints"><h3 class="item__heading"><a class="item__name" href="#variable-breakpoints">breakpoints</a></h3><div class="item__code-wrapper"><pre class="item__code language-scss"><code>$breakpoints: (