nextcloud-breeze-dark/css/apps/thirdparty/_bookmarks.scss

// /* Bookmarks ---------------------------------------------------------------- */

.app-bookmarks #app-content {
    
    .folder--gridview,
    .bookmark--gridview,
    .bookmarkslist--gridview > .create-folder,
    .bookmarkslist--gridview > .create-bookmark {
        background: $background-normal;
        box-shadow: none;
    }

    .bookmark--gridview .bookmark__checkbox {
        background-color: $background-normal;

        input.checkbox + label::before {
            margin: 0 3px 3px 3px;
        }
    }

    .bookmarkslist > :first-child:not(.bookmarkslist__loading):not(.bookmarkslist__empty).active {
        border-top-color: $decoration-active;
    }
}