          <div class="tabs stacked" style="margin-top: 5px; margin-bottom: 5px;">
                  <input type="checkbox" id="c1" aria-hidden="true">
                  <label for="c1" aria-hidden="true">Collapse section 1</label>
                  <div> <p>This is the first collapse section's content.</p> </div>
                  <input type="checkbox" id="c2" aria-hidden="true">
                  <label for="c2" aria-hidden="true">Collapse section 2</label>
                  <div> <p>This is the second co