func ThemeBase() *Theme {
	return ThemeBaseWithRenderer(lipgloss.DefaultRenderer())
}

func ThemeBaseWithRenderer(renderer *lipgloss.Renderer) *Theme {
	var t Theme

	t.FieldSeparator = renderer.NewStyle().SetString("\n\n")

	button := renderer.NewStyle().
		Padding(buttonPaddingVertical, buttonPaddingHorizontal).
		MarginRight(1)

	// Focused styles.
	t.Focused.Base = renderer.NewStyle().PaddingLeft(1).BorderStyle(lipgloss.ThickBorder()).BorderLeft(true)
	t.Focused.Card = renderer.NewStyle().PaddingLeft(1)
	t.Focused.ErrorIndicator = renderer.NewStyle().SetString(" *")
	t.Focused.ErrorMessage = renderer.NewStyle().SetString(" *")
	t.Focused.SelectSelector = renderer.NewStyle().SetString("> ")
	t.Focused.NextIndicator = renderer.NewStyle().MarginLeft(1).SetString("→")
	t.Focused.PrevIndicator = renderer.NewStyle().MarginRight(1).SetString("←")
	t.Focused.MultiSelectSelector = renderer.NewStyle().SetString("> ")
	t.Focused.SelectedPrefix = renderer.NewStyle().SetString("[•] ")
	t.Focused.UnselectedPrefix = renderer.NewStyle().SetString("[ ] ")
	t.Focused.FocusedButton = button.Foreground(lipgloss.Color("0")).Background(lipgloss.Color("7"))
	t.Focused.BlurredButton = button.Foreground(lipgloss.Color("7")).Background(lipgloss.Color("0"))
	t.Focused.TextInput.Placeholder = renderer.NewStyle().Foreground(lipgloss.Color("8"))

	t.Help = help.New().Styles

	// Blurred styles.
	t.Blurred = t.Focused
	t.Blurred.Base = t.Blurred.Base.BorderStyle(lipgloss.HiddenBorder())
	t.Blurred.MultiSelectSelector = renderer.NewStyle().SetString("  ")
	t.Blurred.NextIndicator = renderer.NewStyle()
	t.Blurred.PrevIndicator = renderer.NewStyle()

	return &t
}