/*!
 * Copyright (c) 2026-present, Okta, Inc. and/or its affiliates. All rights reserved.
 * The Okta software accompanied by this notice is provided pursuant to the Apache License, Version 2.0 (the "License.")
 *
 * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0.
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *
 * See the License for the specific language governing permissions and limitations under the License.
 */
import { type BackdropStack } from "./backdropStack.js";
export type UseStackedBackdropPropsArgs = {
    /**
     * The stack this backdrop joins.
     * @default defaultBackdropStack
     */
    backdropStack?: BackdropStack;
    /**
     * If `true`, the overlay is open and its backdrop joins the stack.
     */
    isOpen: boolean;
    /**
     * The z-index the overlay renders at, such as `theme.zIndex.modal`.
     */
    layer: number;
};
export type StackedBackdropProps = {
    invisible: boolean;
    transitionDuration?: number;
};
/**
 * Get the backdrop props that keep stacked overlays from darkening the page more than once. Only the top-most open backdrop paints.
 */
export declare const useStackedBackdropProps: ({ backdropStack, isOpen, layer, }: UseStackedBackdropPropsArgs) => StackedBackdropProps;
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