              </div>
                    
                    <div class="control-item">
                        <label>flex-basis</label>
                        <input type="text" id="flexBasis" value="auto" placeholder="auto, 200px, 50%, etc." onchange="updateItemStyles()">
                    </div>
                    
                    <div class="control-item">
                        <label>align-self</label>
                        <select id="alignSelf" onchange="updateItemStyles()">
           