add stylix

hosts/common/stylix.nix

@@ -0,0 +1,72 @@
+{ config, pkgs, lib, ... }:
+
+let
+  # Opinionated: Nord Base16 scheme (YAML). Swap this for Catppuccin, Gruvbox, etc.
+  nordYaml = pkgs.fetchurl {
+    url = "https://raw.githubusercontent.com/tinted-theming/base16-schemes/master/nord.yaml";
+    sha256 = lib.fakeSha256; # replace with real hash after first build
+  };
+in
+{
+  stylix = {
+    enable = true;
+
+    # Wallpaper applied broadly (Sway, etc.)
+    image = pkgs.fetchurl {
+      url = "https://images.unsplash.com/photo-1441974231531-c6227db76b6e?auto=format&fit=crop&w=2400&q=80";
+      sha256 = lib.fakeSha256; # replace with real hash after first build
+    };
+
+    base16Scheme = nordYaml;
+
+    # Choose light/dark behavior
+    polarity = "dark";
+
+    fonts = {
+      monospace = {
+        package = pkgs.jetbrains-mono;
+        name = "JetBrains Mono";
+      };
+      sansSerif = {
+        package = pkgs.inter;
+        name = "Inter";
+      };
+      serif = {
+        package = pkgs.source-serif;
+        name = "Source Serif 4";
+      };
+      emoji = {
+        package = pkgs.noto-fonts-emoji;
+        name = "Noto Color Emoji";
+      };
+
+      sizes = {
+        applications = 11;
+        terminal = 12;
+        desktop = 11;
+        popups = 11;
+      };
+    };
+
+    cursor = {
+      package = pkgs.bibata-cursors;
+      name = "Bibata-Modern-Ice";
+      size = 24;
+    };
+
+    # Optional: global opacity hints some targets use
+    opacity = {
+      applications = 0.95;
+      terminal = 0.92;
+      popups = 0.95;
+    };
+
+    # Tell Stylix to actually theme these:
+    targets.sway.enable = true;
+    targets.waybar.enable = true;
+
+    # Usually nice to have:
+    targets.gtk.enable = true;
+    targets.kitty.enable = true; # if you use kitty
+  };
+}