d mb-4">
                <div class="card-header py-3">
                  <h6 class="m-0 font-weight-bold text-primary">Basic Buttons</h6>
                </div>
                <div class="card-body">
                  <p>Bootstrap includes several predefined button styles, each serving its own
                    semantic purpose, with a
                    few extras thrown in for more control.</p>
                  <button type="button" class="btn btn-primary mb-1">Primary</button>
                  <bu