/**
 * Media Query Utilities
 * ---------------------
 * Unified helpers for observing media queries, with syntactic sugar for the
 * registered breakpoints.
 */
type Listener = (matches: boolean) => void;
export declare function watchMediaQuery(query: string, listener: Listener): () => void;
export declare function watchBreakpoint(name: string, comparison: "min" | "max" | undefined, listener: Listener): () => void;
export declare const MQ: {
    readonly prefersReducedMotion: "(prefers-reduced-motion: reduce)";
    readonly prefersMoreContrast: "(prefers-contrast: more)";
    readonly prefersLessContrast: "(prefers-contrast: less)";
    readonly colorSchemeDark: "(prefers-color-scheme: dark)";
    readonly colorSchemeLight: "(prefers-color-scheme: light)";
    readonly dynamicRangeHigh: "(dynamic-range: high)";
};
export declare function watchPrefersReducedMotion(listener: Listener): () => void;
export declare function watchPrefersContrast(listener: Listener): () => void;
export declare function watchColorScheme(listener: (scheme: 'dark' | 'light' | 'no-preference') => void): () => void;
export declare function watchDynamicRange(listener: Listener): () => void;
export {};
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