Theme GTK and QT

- Adwaita dark is my gtk theme of choice
- I'll also theme QT based on GTK
diff --git a/modules/gtk.nix b/modules/gtk.nix
new file mode 100644
index 0000000..f7a7afe
--- /dev/null
+++ b/modules/gtk.nix
@@ -0,0 +1,12 @@
+{pkgs, ...}: {
+  home.gtk = {
+    enable = true;
+
+    gtk3.extraConfig = {gtk-application-prefer-dark-theme = true;};
+    gtk4.extraConfig = {gtk-application-prefer-dark-theme = true;};
+    theme = {
+      name = "Adwaita-dark";
+      package = pkgs.gnome.gnome-themes-extra;
+    };
+  };
+}
diff --git a/modules/qt.nix b/modules/qt.nix
new file mode 100644
index 0000000..bfe7e3b
--- /dev/null
+++ b/modules/qt.nix
@@ -0,0 +1,11 @@
+{pkgs, ...}: {
+  home.qt = {
+    enable = true;
+    platformTheme = "gtk";
+
+    style = {
+      name = "Adwaita-dark";
+      package = pkgs.adwaita-qt;
+    };
+  };
+}