Right now it is not possible to tell if the focus is on Cursor. Normal windows have different styles for the windowbar but Cursor does not have those, neither it grays the menu bar or tabs like Firefox does.
Also, if the dark theme, not possible to say where the Cursor window ends if it overlaps a terminal window (which is often black so shadows from the Cursor window is not visible).
I have some styles in .config/gtk-3.0/gtk.css but none applies on Cursor, quite annoyingly. Fedora 40, Gnome 46. Thanks,