fc-btn-warning">Warning Button</button>
                    <button class="fc-btn fc-btn-info">Info Button</button>
                </div>
                
                <div class="demo-item">
                    <h3>Button Sizes</h3>
                    <button class="fc-btn fc-btn-primary fc-btn-sm">Small</button>
                    <button class="fc-btn fc-btn-primary">Normal</button>
                    <button class="fc-btn fc-btn-primary fc-btn-lg">Large</button>
                </div>
           