     <div class="d-flex flex-row astro-3HS6YOU4">
                    <div class="astro-3HS6YOU4">
                      <pre class="astro-3HS6YOU4"><code class="astro-3HS6YOU4">&lt;div class=&quot;app&quot;&gt;
  &lt;div class=&quot;app-wrap&quot;&gt;
    &lt;header class=&quot;app-heading&quot;&gt;
      ... (not required, can be multiple)
    &lt;/header&gt;
    &lt;div class=&quot;app-container&quot;&gt;
      ... (required, must be single)
    &lt;/div&gt;
    &lt;footer class=&quot;app-footer&quot;&gt