I'm running ArchLinux and gnome shell 3.16.1. GTK+ theme: Evopop-gtk-theme Icons: Adwaita Global dark theme.
Running applications like nautilus, gnome-tweak-tool, dconf, system-monitor, gnome-terminal I get the style I have configured.
The problem is when I run other applications like Filezilla, Thunderbird, Caja, Terminator, Eclipse, Wireshark ... Then I get an old style looking and I don't know what is happening. If I run other window manager like awesome-wm or i3 I get a default adwaita style in all applications.
And here is some basic config:
/home/n/.config/gtk-3.0 settings.ini
[Settings]
gtk-application-prefer-dark-theme=1
gtk.css
.header-bar.default-decoration {
padding-top: 3px;
padding-bottom: 3px;
}
.header-bar.default-decoration .button.titlebutton {
padding-top: 2px;
padding-bottom: 2px;
}
/home/n/.config/gtk-2.0 empty