export interface ComposeInput {
    /** css/variables output for legacy (:root selector) */
    legacyCss: string;
    /** css/variables output for rebrand ([data-uy-theme="rebrand"] selector) */
    rebrandCss: string;
    /** css/unity-theme output (@theme block + grid/typography utilities) */
    themeCss: string;
    /** File header + imports */
    header: string;
    /** Custom variant declarations */
    customVariants: string;
    /** Output path for the composed CSS */
    outputPath: string;
}
export declare function composeMultiThemeCss(input: ComposeInput): Promise<void>;