.sidepanel {
    height: 100%;
    width: 25%;
    position: fixed;
    top: 0;
    right: 0;
    background-color: white;
    overflow-x: hidden;
    padding-top: 20px;
}

.mainpanel {
    height: 100%;
    width: 75%;
    position: fixed;
    top: 0;
    left: 0;
    overflow: hidden;
    padding: 0px;
}