/**
 * Input Validation Utilities
 *
 * Centralized validation for all responsive utility functions.
 * Ensures type safety and prevents runtime errors.
 */
/**
 * Custom error class for responsive utilities
 */
export declare class ResponsiveValidationError extends Error {
    constructor(message: string);
}
/**
 * Validates a numeric input parameter
 * @param value - The value to validate
 * @param paramName - Parameter name for error messages
 * @param min - Minimum allowed value
 * @param max - Maximum allowed value
 * @throws ResponsiveValidationError if validation fails
 */
export declare const validateNumber: (value: number | undefined, paramName: string, min?: number, max?: number) => number;
/**
 * Validates font size input
 * @param fontSize - Font size to validate
 * @param paramName - Parameter name for error messages
 * @returns Validated font size
 */
export declare const validateFontSize: (fontSize: number, paramName?: string) => number;
/**
 * Validates screen dimensions
 * @param width - Screen width
 * @param height - Screen height
 * @throws ResponsiveValidationError if validation fails
 */
export declare const validateScreenDimensions: (width: number, height: number) => void;
/**
 * Validates safe area insets
 * @param insets - Safe area insets object
 * @throws ResponsiveValidationError if validation fails
 */
export declare const validateSafeAreaInsets: (insets: {
    top?: number;
    bottom?: number;
    left?: number;
    right?: number;
}) => void;
/**
 * Validates grid column parameters
 * @param mobileColumns - Number of columns for mobile
 * @param tabletColumns - Number of columns for tablet
 * @throws ResponsiveValidationError if validation fails
 */
export declare const validateGridColumns: (mobileColumns?: number, tabletColumns?: number) => void;
/**
 * Clamps a value between min and max bounds
 * @param value - Value to clamp
 * @param min - Minimum value
 * @param max - Maximum value
 * @returns Clamped value
 */
export declare const clamp: (value: number, min: number, max: number) => number;
/**
 * Safely calculates a percentage of a value
 * @param value - Base value
 * @param percentage - Percentage (0-1)
 * @returns Calculated percentage
 */
export declare const safePercentage: (value: number, percentage: number) => number;