title: Applying class to an element if it has a child with certain class
body: <p>is it possible in CSS or Stylus to apply style to an element if it has certain child class?</p>
  
  <p>doing this for example:</p>
  
  <pre><code>.par &gt; .chld
      background-color:red
  </code></pre>
  
  <p>Will color the child, but I need to color the parent</p>
  
  <p>How can I do that?</p>