libadwaita does this to a degree: https://gnome.pages.gitlab.gnome.org/libadwaita/doc/1.6/css-variables.html https://gnome.pages.gitlab.gnome.org/libadwaita/doc

libadwaita does this to a degree: https://gnome.pages.gitlab.gnome.org/libadwaita/doc/1.6/css-variables.html https://gnome.pages.gitlab.gnome.org/libadwaita/doc/1.6/css-...