/**
 * Dark Theme CSS Variables
 *
 * Dark theme reverses the shade values:
 * - Light shades (300) become dark
 * - Dark shades (700) become light
 *
 * All colors are dynamically generated based on the selected
 * palette and colors from Appearance > Colors.
 *
 * The dynamic dark CSS is generated in /inc/generate-css-vars.php
 * and loaded via the inject_brand_color_stylesheet() function.
 */