                  APP HEADING
                    </header>
                    <div class="d-flex flex-row scr-y-a flex-fill astro-3HS6YOU4">
                      <aside class="d-flex flex-column scr-y-a bg-concrete max-w-xs astro-3HS6YOU4">
                        <header class="bg-warning astro-3HS6YOU4">
                          SIDE HEADING
                        </header>
                        <div class="flex-fill scr-y-a astro-3HS6YOU4">
                          <h4 class="astro-3HS6YOU4">SIDE