import { NestedCSSProperties } from 'typestyle/lib/types';
export interface IBreakpoints {
    sm: number;
    md: number;
    lg: number;
    xl: number;
}
declare type BreakpointSize = keyof IBreakpoints;
export declare function setBreakpointSizes(breakpointSizes: IBreakpoints): void;
export declare function widthDown(size: BreakpointSize, styles: NestedCSSProperties): NestedCSSProperties;
export declare function widthUp(size: BreakpointSize, styles: NestedCSSProperties): NestedCSSProperties;
export {};