/.card -->

            <!-- Block buttons -->
            <div class="card">
              <div class="card-header">
                <h3 class="card-title">Block Buttons</h3>
              </div>
              <div class="card-body">
                <button type="button" class="btn btn-default btn-block">.btn-block</button>
                <button type="button" class="btn btn-default btn-block btn-flat">.btn-block .btn-flat</button>
                <button type="button" class="btn btn-default btn-block btn