import { ReactNode } from "react";
/**
 * Provides a portal target for descendants.
 * Add at app root and inside an overlay to handle stacking contexts.
 */
export declare function PortalHost({ children }: {
    children: ReactNode;
}): import("react").JSX.Element;
/**
 * THE NEAREST HOST'S MOUNT NODE, for an overlay that does not portal through
 * {@link Portal} — Base UI's own `Portal` takes a container ELEMENT rather than
 * rendering into one.
 *
 * It is the same rule this module already states, reached by the other door: an
 * overlay opened from inside a host belongs in that host's DOM tree. `null`
 * where there is no host, which is Base UI's own default — the document.
 */
export declare function useOverlayHost(): HTMLElement | null;
/**
 * Renders children into the nearest `PortalHost`, and NOTHING until there is
 * one — the host mounts its container on its first commit, so an overlay opened
 * in that same commit re-renders into it rather than escaping to `document.body`
 * and out of the dialog whose focus trap owns it.
 */
export declare function Portal({ children }: {
    children: ReactNode;
}): import("react").ReactPortal | null;