export declare type ZIndexLevel = 'normal' | 'middle' | 'important';
interface ZIndexScope {
    min: number;
    max: number;
}
declare class ZIndexManager {
    private value;
    readonly scope: Record<ZIndexLevel, ZIndexScope>;
    constructor();
    next(level: ZIndexLevel): number;
}
declare const _default: ZIndexManager;
export default _default;