toolbox {
    // Has to be the direct child or we get unwanted undershoot on framed lists for example
    > scrolledwindow,
    > stacksidebar > scrolledwindow {
        > undershoot.top {
            background: undershoot-gradient(to bottom);
        }

        > undershoot.bottom {
            background: undershoot-gradient(to top);
        }
    }

    .top headerbar,
    .top headerbar:backdrop,
    .bottom actionbar,
    .bottom actionbar:backdrop {
        background: inherit;
        box-shadow: none;
        border-radius: 0;
    }
}
