      <header class="bg-primary text-white astro-3HS6YOU4">
                  <h3 class="astro-3HS6YOU4">HTML Structure</h3>
                </header>
                <div class="box-body astro-3HS6YOU4">
                  <p class="astro-3HS6YOU4">
                    <code class="astro-3HS6YOU4">.app</code> class should be added to <code class="astro-3HS6YOU4">div</code> element inside the <code class="astro-3HS6YOU4">body</code> tag. If you will use
                    the chaldene with
                 