{
  config,
  pkgs,
  lib,
  ...
}:

{
  programs.hyprland = {
    enable = true;
    xwayland.enable = true;
  };

  services.getty.autologinUser = config.my.username;

  # Boot straight into Hyprland from the first virtual console on any machine.
  # No display manager required; tty2-6 remain available as plain shells.
  # The start-hyprland wrapper ships with programs.hyprland and sets up the
  # session environment correctly.
  environment.loginShellInit = ''
    if [ "$(tty)" = "/dev/tty1" ]; then
        exec start-hyprland
    fi
  '';

  # Vendor-neutral graphics stack. Vendor modules (e.g. modules/hardware/nvidia.nix)
  # only add drivers and vendor-specific environment variables.
  hardware.graphics = {
    enable = true;
    enable32Bit = true;
  };

  # Machine-agnostic Wayland session variables.
  # GPU/vendor specific variables live with their hardware module (e.g. modules/hardware/nvidia.nix).
  environment.sessionVariables = {
    NIXOS_OZONE_WL = "1";
    HYPRCURSOR_ENABLED = "1";
    MOZ_ENABLE_WAYLAND = "1";
    QT_QPA_PLATFORM = "wayland;xcb";
    QT_WAYLAND_DISABLE_WINDOWDECORATION = "1";
    CLUTTER_BACKEND = "wayland";
    GDK_BACKEND = "wayland,x11,*";
  };

  # Fonts used across the desktop shell (Silicon Volt theme):
  # JetBrains Mono for terminal/UI mono, IBM Plex Sans for UI sans,
  # Instrument Serif for display italics, Nanum Gothic Coding as mono fallback.
  fonts.packages =
    with pkgs;
    [
      nerd-fonts.jetbrains-mono
      nerd-fonts.fira-code
      font-awesome
      ibm-plex
      nanum-gothic-coding
    ]
    ++ lib.optional (lib.hasAttr "instrument-serif" pkgs) pkgs.instrument-serif;
}