title: How to expand child <div> with 100% of body width?
body: <p>I have something like this: </p>
  
  <pre><code>&lt;body&gt;
      &lt;div style="width:700px; margin:0 auto;"&gt;
          &lt;div class="inner-div"&gt;&lt;/div&gt;
      &lt;/div&gt;
  &lt;/body&gt;
  </code></pre>
  
  <p>Is there a way to expand child div with class "inner-div", to 100% of body width? </p>