/**
 * Utility function for combining CSS class names
 * Accepts strings, objects with truthy/falsy values, or undefined values
 * @param classes - Array of class names (strings), conditional classes (objects), or undefined
 * @returns Combined class names as a single string
 */
export declare const cn: (...classes: (string | Record<string, boolean | string | number | null | undefined> | undefined)[]) => string;