import { ReactNode } from "react";
export interface PortalHostProps {
    /** The host stands for a screen of its own — a frame drawn at a stated size inside a larger window: a
     *  dialog opened within covers that screen and takes its form (a phone's sheet), never the window's. */
    screen?: boolean;
    children: ReactNode;
}
export declare function PortalHost({ screen, children }: PortalHostProps): import("react").JSX.Element;
/** The nearest host's node for an overlay that does not use {@link Portal}, since Base UI's `Portal` takes
 *  a container element. `null` without a host, Base UI's default (the document). */
export declare function useOverlayHost(): HTMLElement | null;
/** The nearest screen's host (`PortalHost screen`) — a dialog covers the screen it opened on, and at a
 *  phone's width it is that screen's sheet. `null` without one: the document, the window's screen. */
export declare function useScreenHost(): HTMLElement | null;
/** Renders nothing until a host exists: the host mounts on its first commit, so an overlay opened then
 *  re-renders into it instead of escaping to `document.body` and out of the focus trap. */
export declare function Portal({ children }: {
    children: ReactNode;
}): import("react").ReactPortal | null;