/**
 * Breakpoint design tokens for BeatUI.
 *
 * Defines responsive breakpoint values that are converted to CSS custom properties
 * and media queries at build time. Breakpoints use `rem` units for accessibility
 * and follow a mobile-first approach.
 *
 * @module
 */
/**
 * Breakpoint size definitions mapping size names to their `rem` values.
 *
 * | Name | Value   | Pixels |
 * |------|---------|--------|
 * | sm   | 40rem   | 640px  |
 * | md   | 48rem   | 768px  |
 * | lg   | 64rem   | 1024px |
 * | xl   | 80rem   | 1280px |
 * | 2xl  | 96rem   | 1536px |
 */
export declare const breakpoints: {
    readonly sm: "40rem";
    readonly md: "48rem";
    readonly lg: "64rem";
    readonly xl: "80rem";
    readonly '2xl': "96rem";
};
/**
 * Union type of all available breakpoint size names.
 */
export type BreakpointName = keyof typeof breakpoints;
/**
 * Returns the CSS custom property name for a breakpoint size.
 *
 * @param size - The breakpoint size name
 * @returns The CSS variable name (e.g., `'--breakpoint-md'`)
 *
 * @example
 * ```ts
 * getBreakpointVarName('md') // '--breakpoint-md'
 * ```
 */
export declare function getBreakpointVarName(size: BreakpointName): string;
/**
 * Returns a CSS `var()` expression referencing the breakpoint custom property.
 *
 * @param size - The breakpoint size name
 * @returns A CSS `var()` string (e.g., `'var(--breakpoint-md)'`)
 *
 * @example
 * ```ts
 * getBreakpointVar('md') // 'var(--breakpoint-md)'
 * ```
 */
export declare function getBreakpointVar(size: BreakpointName): string;
/**
 * Returns a CSS media query string for a minimum-width breakpoint.
 *
 * @param size - The breakpoint size name
 * @returns A media query string (e.g., `'@media (width >= 48rem)'`)
 *
 * @example
 * ```ts
 * getBreakpointMediaQuery('md') // '@media (width >= 48rem)'
 * ```
 */
export declare function getBreakpointMediaQuery(size: BreakpointName): string;
/**
 * Generates CSS custom property declarations for all breakpoint tokens.
 *
 * @returns A record mapping CSS variable names to their breakpoint values
 *
 * @example
 * ```ts
 * const vars = generateBreakpointVariables()
 * // vars['--breakpoint-md'] === '48rem'
 * ```
 */
export declare function generateBreakpointVariables(): Record<string, string>;