this is a nice article about the topic https://tesk.page/2024/06/03/libadwaita-splitting-gtk-and-design-language/

my slop meter is beeping for that image too

I think Inkscape’s UI could def also gain some good improvements even just with little technical know-how! I’ve been trying to make a UI style for it from scratch purely through GTK’s CSS layer (no touching internal code or recompiling at all) and I’m pretty impressed of what’s possible. (see here)

If anyone is even just familiar with CSS, you could certainly make good contributions to the UI layer. Or help out in my repo i posted above, I need to port the style to Inkscape 1.5 / GTK4 (aswell as cover some missing stuff e.g. right-to-left) but I don’t find a lot of time to do it.

might want to check gram editor