/**
 * Build CSS custom properties (variables) from Seeds theme objects
 */
/**
 * Build a combined CSS file with both light and dark themes. Exported so tests
 * can assert the source theme (extended sproutTheme) actually feeds the output.
 */
export declare function generateCombinedCSS(): string;
/**
 * Main build function for CSS variables
 */
export declare function buildCSSVariables(): Promise<void>;
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