I'd like to inject/override a Gtk Window property at startup, ideally from a GTK config file or from CSS, so that GTK ignores the application startup defaults.
This is the property I'd like to override:
decorated https://docs.gtk.org/gtk4/property.Window.decorated.html
I'd like to have it set to false for every application.
That's a property of Gtk.Window, inherited by all windows. As far as I understand it, there's no way to set it via CSS (but I may be wrong).
Is there a way to do that?
If it's not possible, is it possible to at least disable window decoration (like the property would) globally, in GTK?