window:not(.unity-csd) decoration {
    margin: 10px;
    border-radius: 6px 6px 0 0;
    box-shadow: 1px 5px 15px 1px @window_active_shadow_color;
}

window:not(.unity-csd) decoration:backdrop {
    box-shadow: 1px 5px 15px 1px @window_inactive_shadow_color;
}