      &lt;aside class=&quot;app-side&quot;&gt;
        &lt;header class=&quot;side-heading&quot;&gt;
          SIDE HEADING
        &lt;/header&gt;
        &lt;div class=&quot;side-content&quot;&gt;
          SIDE CONTENT
        &lt;/div&gt;
        &lt;footer class=&quot;side-footer&quot;&gt;
          SIDE FOOTER
        &lt;/footer&gt;
      &lt;/aside&gt;
      &lt;div class=&quot;app-main&quot;&gt;
        &lt;header class=&quot;main-heading&quot;&gt;
          MAIN HEADING
        &lt;/header&gt;
   