div.admin-wrapper {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0px;
    left: 0px;
    display: grid;
    grid-template-columns: 300px auto 15%;
    grid-template-rows: auto;
    overflow: hidden;
    grid-template-areas: "left-sidebar center-container .";
}

div.admin-sub-container {
    position: relative;
    grid-area: center-container;
    overflow: hidden;
}