add gtk theming

user-jsutter.nix

@@ -49,7 +49,7 @@ in
 
     home.stateVersion = "22.11";
 
-    # Git Configuration
+  # Git Configuration
     programs.git = {
     enable = true;
     userName  = "Julian Sutter";
@@ -62,6 +62,40 @@ in
       };
     };
 
+  # GTK Stuff
+  gtk = {
+    enable = true;
+
+    iconTheme = {
+      name = "Papirus-Dark";
+      package = pkgs.papirus-icon-theme;
+    };
+
+    theme = {
+      name = "palenight";
+      package = pkgs.palenight-theme;
+    };
+
+    cursorTheme = {
+      name = "Numix-Cursor";
+      package = pkgs.numix-cursor-theme;
+    };
+
+    gtk3.extraConfig = {
+      Settings = ''
+        gtk-application-prefer-dark-theme=1
+      '';
+    };
+
+    gtk4.extraConfig = {
+      Settings = ''
+        gtk-application-prefer-dark-theme=1
+      '';
+    };
+  };
+
+  home.sessionVariables.GTK_THEME = "palenight";
+
 # Add Firefox GNOME theme directory
   home.file."firefox-gnome-theme" = {
     target = ".mozilla/firefox/default/chrome/firefox-gnome-theme";