/**
 * Format a date
 */
export declare function formatDate(date: Date | number | string, style?: DateStyle | DateFormatOptions, locale?: string): string;
/**
 * Format a time
 */
export declare function formatTime(date: Date | number | string, style?: TimeStyle | DateFormatOptions, locale?: string): string;
/**
 * Format a date and time
 */
export declare function formatDateTime(date: Date | number | string, dateStyle?: DateStyle, timeStyle?: TimeStyle, locale?: string): string;
/**
 * Format relative time (e.g., "2 days ago", "in 3 hours")
 */
export declare function formatRelativeTime(date: Date | number | string, baseDate?: Date | number | string, style?: 'long' | 'short' | 'narrow', locale?: string): string;
/**
 * Format a number
 */
export declare function formatNumber(value: number, options?: NumberFormatOptions, locale?: string): string;
/**
 * Format a currency value
 */
export declare function formatCurrency(value: number, currency?: string, options?: Omit<NumberFormatOptions, 'style' | 'currency'>, locale?: string): string;
/**
 * Format a percentage
 */
export declare function formatPercent(value: number, options?: Omit<NumberFormatOptions, 'style'>, locale?: string): string;
/**
 * Format a number with units (e.g., "5 kilograms", "10 miles")
 */
export declare function formatUnit(value: number, unit: string, unitDisplay?: 'long' | 'short' | 'narrow', locale?: string): string;
/**
 * Format bytes to human-readable format
 */
export declare function formatBytes(bytes: number, decimals?: number, locale?: string): string;
/**
 * Format a list of items
 */
export declare function formatList(items: string[], type?: ListType, style?: ListStyle, locale?: string): string;
/**
 * Get the plural category for a number
 */
export declare function formatPlural(value: number, locale?: string): Intl.LDMLPluralRule;
/**
 * Select from plural options based on a number
 */
export declare function selectPlural<T>(value: number, options: Partial<Record<Intl.LDMLPluralRule, T>> & { other: T }, locale?: string): T;
/**
 * Get display name for a code
 */
export declare function getDisplayName(code: string, type?: DisplayNameType, style?: 'long' | 'short' | 'narrow', locale?: string): string | undefined;
/**
 * Get language name
 */
export declare function getLanguageName(languageCode: string, locale?: string): string | undefined;
/**
 * Get region/country name
 */
export declare function getRegionName(regionCode: string, locale?: string): string | undefined;
/**
 * Get currency name
 */
export declare function getCurrencyName(currencyCode: string, locale?: string): string | undefined;
/**
 * Compare strings in a locale-aware manner
 */
export declare function compareStrings(a: string, b: string, options?: Intl.CollatorOptions, locale?: string): number;
/**
 * Sort an array of strings in locale-aware order
 */
export declare function sortStrings(strings: string[], options?: Intl.CollatorOptions, locale?: string): string[];
/**
 * Get the text direction for a locale
 */
export declare function getTextDirection(locale?: string): 'ltr' | 'rtl';
/**
 * Check if a locale uses RTL text direction
 */
export declare function isRTL(locale?: string): boolean;
export declare interface DateFormatOptions extends Intl.DateTimeFormatOptions {
  dateStyle?: DateStyle
  timeStyle?: TimeStyle
}
// =============================================================================
// Number Formatting
// =============================================================================
export declare interface NumberFormatOptions extends Intl.NumberFormatOptions {
  compact?: boolean
  precision?: number
}
// =============================================================================
// Date Formatting
// =============================================================================
export type DateStyle = 'full' | 'long' | 'medium' | 'short';
export type TimeStyle = 'full' | 'long' | 'medium' | 'short';
// =============================================================================
// List Formatting
// =============================================================================
export type ListType = 'conjunction' | 'disjunction' | 'unit';
export type ListStyle = 'long' | 'short' | 'narrow';
// =============================================================================
// Display Names
// =============================================================================
export type DisplayNameType = 'language' | 'region' | 'script' | 'currency' | 'calendar' | 'dateTimeField';