title: Combining class selector with attribute selector
body: <p>I have the following HTML:</p>
  
  <pre><code>&lt;a href="somelink.htm" class="button columns large-6"&gt;wide button&lt;/a&gt;
  &lt;a href="somelink.htm" class="button columns large-3"&gt;narrow button&lt;/a&gt;
  </code></pre>
  
  <p>I've tried using an attribute selector and combining it with the <code>button</code> class but it doesn't work as expected.</p>
  
  <pre><code>.button.[class*="large-"] {
      font-size: 0.9em;
  }
  </code></pre>
  
  <p>Am I using this correctly and if not, how?</p>