import { ReactiveController, ReactiveControllerHost } from 'lit';
import { THeaderPosition, THeaderScrollBehavior } from './types';
export interface HeaderChromeOptions {
    mobileBreakpoint: number;
    tabletBreakpoint: number;
    position: THeaderPosition;
    scrollBehavior: THeaderScrollBehavior;
}
/**
 * Shared header shell logic for `pkt-header-service` and `pkt-header-global`:
 * responsive width measurement (ResizeObserver → `isMobile`/`isTablet`),
 * scroll-to-hide (`isHidden`), body scroll-lock, and focus return when a menu
 * closes.
 *
 * The menu state machine, click-outside handling and the scroll-lock
 * *condition* stay in each element since they differ between the variants.
 */
export declare class HeaderChromeController implements ReactiveController {
    private host;
    private getOptions;
    isMobile: boolean;
    isTablet: boolean;
    isHidden: boolean;
    /** When true, scroll-to-hide is paused (e.g. while a menu/overlay is open). */
    pauseScrollHide: boolean;
    private componentWidth;
    private resizeObserver?;
    private lastScrollPosition;
    private scrollLockToken;
    private lastFocusedElement;
    private shouldRestoreFocus;
    constructor(host: ReactiveControllerHost, getOptions: () => HeaderChromeOptions);
    hostConnected(): void;
    hostDisconnected(): void;
    /** Start measuring the header element's width. Call from `firstUpdated`. */
    observe(element: HTMLElement | undefined): void;
    /** Recompute `isMobile`/`isTablet` (e.g. when the breakpoints change). */
    refreshBreakpoints(): void;
    private handleScroll;
    setScrollLock(shouldLock: boolean): void;
    captureFocus(): void;
    flagRestoreFocus(): void;
    restoreFocus(): void;
}