              <strong>Live Test Column 1</strong><br>
                        <small class="text-muted">Responsive behavior in action</small>
                    </div>
                </div>
                <div class="col-12 col-sm-6 col-md-4 col-lg-3">
                    <div class="demo-grid-item" style="background: #dcfce7; border-color: #16a34a;">
                        <strong>Live Test Column 2</strong><br>
                        <small class="text-muted">Responsive behavior in action</small>
   