Does anything like this exist? i started modifying the gnome-shell.css file and noticed some none w3c standard attributes in there. Anyone know where i can find some info about it? Also is there an application/helping tool that contains gnome-shell elements (so i can see my changes easily)
I can just suggest some reading material:
Part III. Theming in GTK+
Making GTK3 themes – Part 1: Basics
And links on this page
This link should help?