.theme-doc-sidebar-item-category-level-1 .menu__list-item-collapsible {
    border-top: 0.5px solid;
    border-top-color: var(--ifm-category-color, var(--ifm-menu-color-background-active));
    border-radius: 0;
    font-weight: 600;
    padding-block: 0.25em;
}