title: HTML5 role=main, how to style
body: <p>If I have</p>
  
  <pre><code>&lt;div role="main"&gt;
  
  &lt;/div&gt;
  </code></pre>
  
  <p>How do I style <code>main</code> with CSS? Or do I also have to add an ID or a class to the <code>&lt;div&gt;</code>?</p>