@layout-drawer-width: 240px;
@layout-header-desktop-baseline: 500;
@layout-tab-desktop-padding: 200;
.bar {
    width: calc(~"100% - @{layout-drawer-width}");
    height: calc(100% ~"-"
        ((@layout-header-desktop-baseline - @layout-tab-desktop-padding) * 2));
}