/**
 * Accessibility Utilities
 *
 * Shared utilities for implementing accessible components following
 * WCAG 2.1 Level AA guidelines and ARIA Authoring Practices Guide.
 */
import type React from 'react';
/**
 * Creates a visually hidden element for screen reader-only content
 */
export declare const visuallyHiddenStyles: React.CSSProperties;
/**
 * Generates unique IDs for accessibility attributes
 */
export declare const generateA11yId: (prefix: string, uniqueId: string) => string;
/**
 * Combines multiple ID strings for aria-describedby
 */
export declare const combineAriaDescribedBy: (...ids: (string | undefined | false)[]) => string | undefined;
/**
 * ARIA live region politeness levels
 */
export type AriaLivePoliteness = 'off' | 'polite' | 'assertive';
/**
 * Gets appropriate ARIA live region attributes based on severity
 */
export declare const getAriaLiveAttributes: (severity?: "error" | "warning" | "info" | "success") => {
    role: "alert" | "status";
    'aria-live': AriaLivePoliteness;
    'aria-atomic': boolean;
};
/**
 * Valid aria-haspopup values
 */
export type AriaHasPopup = boolean | 'grid' | 'true' | 'false' | 'dialog' | 'listbox' | 'menu' | 'tree';
/**
 * Valid aria-current values
 */
export type AriaCurrent = 'page' | 'step' | 'location' | 'date' | 'time' | boolean | 'false';