{
  config = {
    # Color scheme.
    colorschemes.catppuccin = {
      enable = true;
      settings = {
        flavour = "mocha";
        no_bold = false;
        no_italic = false;
        no_underline = false;
        integrations = {
          cmp = true;
          neotree = true;
          harpoon = true;
          gitsigns = true;
          which_key = true;
          illuminate.enabled = true;
          treesitter = true;
          treesitter_context = true;
          telescope.enabled = true;
          indent_blankline.enabled = true;
          native_lsp = {
            enabled = true;
            inlay_hints = {
              background = true;
            };
            underlines = {
              errors = ["underline"];
              hints = ["underline"];
              information = ["underline"];
              warnings = ["underline"];
            };
          };
        };
      };
    };

    # Options.
    opts = {
      # Indent settings.
      tabstop = 2;
      shiftwidth = 2;
      expandtab = true;
      # Line number.
      number = true;
      relativenumber = true;
      signcolumn = "yes";
      # Search case sensitivity.
      ic = true;
      # For dragging windows
      mouse = "a";
    };

    # Clipboard.
    clipboard = {
      register = "unnamedplus";
      providers.xclip.enable = true;
    };
    autoCmd = [
      {
        event = "InsertLeave";
        pattern = "*";
        command = "silent! update";
      }
    ];
  };
}