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Teutonic CSS
Use it

Active

This is a strong highlight class for the currently activated navigational menu item.

Syntax: .active
SCSS: _active.scss
<div class="grid gap-no text-mono">
  <a class="span-3 box" href="#">a.box</a>
  <a class="span-6 box active" href="#">a.box.active</a>
  <a class="span-3 box" href="#">a.box</a>
</div>