isible;
                border: 1px solid #666;
                overflow: hidden;
            }
            body {
                overflow: hidden;
            }

            #app {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background-color: #f2f4f6;
            }

            #controls {
                display: flex;
       