{ inputs, ... }:
{
  perSystem =
    { pkgs, ... }:
    let
      kittyConfig = ''
        # Font configuration
        font_family IosevkaTerm Nerd Font
        bold_font IosevkaTerm Nerd Font Bold
        italic_font IosevkaTerm Nerd Font Italic
        bold_italic_font IosevkaTerm Nerd Font Bold Italic
        font_size 12

        # Window settings
        initial_window_width 80c
        initial_window_height 20c

        # Enable remote control for runtime theme switching
        allow_remote_control yes
        listen_on unix:/tmp/kitty-socket

        # Include theme colors from /var/theme/config
        include /var/theme/config/kitty-colors.conf

        # URL handling
        open_url_with /run/current-system/sw/bin/xdg-open
        detect_urls yes

        # Disable bell
        enable_audio_bell no

        # Don't reset the terminal on ctrl+shift+delete; it's too close to
        # shift+insert (paste) and the reset scrambles running programs.
        map ctrl+shift+delete no_op
      '';

      # kitty only recognises `+kitten` as its first argument, so the config
      # must not be injected via `--config`: that would turn `kitty +kitten
      # icat` (nnn's image preview) into a terminal window trying to exec a
      # program called `+kitten`. KITTY_CONFIG_DIRECTORY leaves argv alone.
      configDir = pkgs.writeTextDir "kitty.conf" kittyConfig;

      # Color files consumed by switch-theme (configs/themes.nix) via
      # /etc/themes/<name>/kitty-colors.conf.
      themes = {
        # Gruvbox Light
        light = ''
          foreground #3c3836
          background #f9f5d7

          cursor #3c3836
          cursor_text_color #f9f5d7

          # Normal colors
          color0 #fbf1c7
          color1 #cc241d
          color2 #98971a
          color3 #d79921
          color4 #458588
          color5 #b16286
          color6 #689d6a
          color7 #7c6f64

          # Bright colors
          color8 #928374
          color9 #9d0006
          color10 #79740e
          color11 #b57614
          color12 #076678
          color13 #8f3f71
          color14 #427b58
          color15 #3c3836
        '';
        dark = ''
          foreground #ffffff
          background #000000

          cursor #ffffff
          cursor_text_color #F81CE5

          # Normal colors
          color0 #000000
          color1 #fe0100
          color2 #33ff00
          color3 #feff00
          color4 #0066ff
          color5 #cc00ff
          color6 #00ffff
          color7 #d0d0d0

          # Bright colors
          color8 #808080
          color9 #fe0100
          color10 #33ff00
          color11 #feff00
          color12 #0066ff
          color13 #cc00ff
          color14 #00ffff
          color15 #FFFFFF
        '';
      };
    in
    {
      packages.kitty = inputs.wrappers.lib.wrapPackage {
        inherit pkgs;
        package = pkgs.kitty;
        env.KITTY_CONFIG_DIRECTORY = "${configDir}";
        passthru = { inherit themes; };
      };
    };
}