#horizontalSplitter smart-splitter-item:nth-of-type(1) {
    width: 500px;
    height: 250px;
}

#horizontalSplitter smart-splitter-item:nth-of-type(2) {
    width: 150px;
    height: 450px;
    /*height: 150px;*/
}

#horizontalSplitter smart-splitter-item:nth-of-type(3) {
    width: 150px;
    height: 250px;
}

#controlPanel {
    margin-top: 1%;
}

#horizontalSplitter {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
}