import * as React from "react";
export interface OverlayPortalProviderProps {
    /**
     * The element overlays are rendered into. Pass the shadow root, or any element inside it.
     * `undefined` restores the default, so a subtree can opt back out.
     */
    container: Element | undefined;
    children: React.ReactNode;
}
export declare function OverlayPortalProvider({ container, children }: OverlayPortalProviderProps): React.JSX.Element;
export interface ThemeScopeProps extends React.HTMLAttributes<HTMLDivElement> {
    children: React.ReactNode;
}
/**
 * A themed region whose overlays keep the region's tokens.
 *
 * Put the theme on it — `style={tenantTheme(hex).vars}`, `data-tenant="acme"`, `className="dark"`
 * — or on any ancestor, or in a stylesheet that never mentions React at all. The scope is read
 * from the DOM, not from props, so all three paths behave the same.
 *
 * The element itself is `display: contents` by default, so dropping it into an existing flex or
 * grid row changes no layout; pass `style={{ display: "block" }}` if you want a box.
 */
export declare function ThemeScope({ children, style, ...props }: ThemeScopeProps): React.JSX.Element;
/**
 * The container this overlay should render into. An explicit prop wins, so one panel can be placed
 * elsewhere without unmounting the provider around it.
 *
 * Not exported from the public barrel: this is a contract between the provider and the overlays
 * this library ships, not a knob for consumers — a consumer that needs the value has a provider.
 *
 * The effect re-reads the enclosing `ThemeScope` when an overlay mounts. A `MutationObserver`
 * covers a theme changed by an attribute; this covers the rest — a stylesheet added late, a
 * `@media` or `@supports` branch that flipped since the snapshot was taken. It costs one enumerate
 * + diff (1.2ms median over 2087 properties, measured in Chromium) per overlay mount and NOTHING
 * when no `ThemeScope` is above, because the context is then `undefined`.
 */
export declare function useOverlayPortalContainer(override?: Element): Element | undefined;