title: Page gaps with sticky CSS elements
body: <p>Is there a way to prevent content gaps when using sticky positioning? I was using absolute before and it looked just fine.
  The gaps are on top and the sides.</p>
  
  <pre><code>div.header{
              background-color:#191a1c;
              position: sticky;
              top: 0px;
              left: 0px;
              width: 100%;
              height: 70px;
          }
  </code></pre>