import { RefObject } from 'react';
/**
 * The distance from the viewport top that sticky content must leave free for
 * the sticky chrome above it. The stylesheet seeds it (0, or the topbar height
 * when the topbar is sticky); a sticky stack republishes it for its siblings.
 */
export declare const STICKY_OFFSET_VAR = "--lt-sticky-offset";
/**
 * The offset a sticky stack itself pins to. It is frozen per element because
 * the stack overrides the shared variable on its parent, which would otherwise
 * feed back into its own `top`.
 */
export declare const STICKY_OWN_TOP_VAR = "--lt-sticky-own-top";
/**
 * Pins an element below the sticky chrome above it and publishes the element's
 * own height, added to that chrome, as the sticky offset for its siblings.
 */
export declare function useStickyOffsetPublisher(enabled: boolean): RefObject<HTMLDivElement | null>;