Mono-gtk-theme VS adw-gtk3

Maybe Mono?

if it was a gtk3 file, then yes, because they differ in structure. if you wanna create your own theme, you can see my source code.

What the other comment said is relevant. But custom themes are possible. This theme - and many others - has instructions on how to do it.

if anyone wants to try the theme then here is the link

To install the Gtk4 theme move the contents of gtk4.0 from theme folder to ~/.config/gtk4.0

see at the end of the file starting with quick settings, these are new properties in gnome 43

no, it's just a theme without extensions

Check gnome-shell.css from my theme

If someone interesting

Use this theme

As far as I know it doesn't exist yet... but most likely Evince will be ported in the future. But while that doesn't happen, what you can do is use the adw-gtk3 theme (https://github.com/lassekongo83/adw-gtk3) for legacy applications to combine with applications that are already ported to libadwaita

Why not use the adw-gtk theme for gnome to make all the deco's match rather than use Adwaita-Dark?

Application Theme : adw-gtk-3 with Gradience

You can use the adw gtk3 theme. https://github.com/lassekongo83/adw-gtk3

GTK theme: adw-gtk3

That's because i use this KvLibadwaita and adw-gtk3 themes to have everything looking the same on Gnome :>

Just found a workaround for the issue until an update fixes the issue for Fedora 28 - Alt+F2, type "r" to restart Gnome Shell. More info: https://github.com/lassekongo83/adw-gtk3/issues/213

I believe that adw-gtk3 could still be beneficial in ensuring a uniform appearance across both GTK3 and GTK4 applications. The more solutions we can offer to users, the greater the likelihood of achieving the desired outcome.