ALTER TABLE site_settings
    ADD COLUMN header_bg_color TEXT NOT NULL DEFAULT '#232323',
    ADD COLUMN header_text_color TEXT NOT NULL DEFAULT '#f2f2f2',
    ADD COLUMN body_bg_color TEXT NOT NULL DEFAULT '#1a1a1a',
    ADD COLUMN body_text_color TEXT NOT NULL DEFAULT '#f2f2f2',
    ADD COLUMN footer_bg_color TEXT NOT NULL DEFAULT '#232323',
    ADD COLUMN footer_text_color TEXT NOT NULL DEFAULT '#f2f2f2',
    ADD COLUMN accent_color TEXT NOT NULL DEFAULT '#ffd700',
    ADD COLUMN product_layout TEXT NOT NULL DEFAULT 'grid',
    ADD COLUMN menu_style TEXT NOT NULL DEFAULT 'horizontal';