            <code>.btn-sm</code> classes.
                      </p>
                      <div class="buttons">
                        <a href="#" class="btn btn-sm btn-warning">Small</a>
                        <a href="#" class="btn btn-danger">Normal</a>
                        <a href="#" class="btn btn-lg btn-dark">Large</a>
                      </div>
                      <div class="buttons">
                        <a href="#" class="btn btn-sm btn-outline-primary"
                          >Sma