import { LitElement, type PropertyValueMap } from 'lit';
/**
 * Container for header navigation links.
 * @slot unnamed - This element has a slot.
 * @fires on-nav-toggle - Fires when the nav menu opens or closes. Detail: `{ open }`.
 * @cssprop [--kyn-global-switcher-max-height=calc(100vh - var(--kd-header-reserved-space) - 16px)] - Max height for global-switcher flyout panels, including categorical nav wrappers.
 */
export declare class HeaderNav extends LitElement {
    static styles: import("lit").CSSResult;
    /** Small screen header nav visibility.
     * @ignore
     */
    accessor menuOpen: boolean;
    /** Force correct slot
     * @internal
     */
    accessor slot: string;
    /** Controls which flyout (if any) auto-opens when the nav renders.
     * - '' (empty, default): original behavior — flyouts auto-collapse on mouse leave, nothing auto-opens.
     * - 'default': auto-open the first categorical flyout; flyouts stay open on mouse leave.
     * - '<id>': auto-open the flyout whose kyn-header-link id matches; flyouts stay open on mouse leave.
     */
    accessor autoOpenFlyout: string;
    /** When true, all links in flyouts will truncate long text with ellipsis.
     * This cascades to all nested kyn-header-link components via CSS custom property.
     */
    accessor truncateLinks: boolean;
    /** Boolean value reflecting whether the navigation has categories.
     * @internal
     */
    accessor hasCategories: boolean;
    /** Mutation observer for attribute changes.
     * @internal
     */
    private _attrObserver?;
    /** Tracks whether auto-open has already been triggered to prevent multiple triggers.
     * @internal
     */
    private _autoOpenTriggered;
    /** Bound document click handler to allow proper add/remove of listener
     * @internal
     */
    private _boundHandleClickOut;
    /** @internal */
    private get _isDesktop();
    render(): import("lit-html").TemplateResult<1>;
    private _toggleMenuOpen;
    private _updateCategoriesVisibility;
    private _handleSlotChange;
    private _handleClickOut;
    protected firstUpdated(_changed: PropertyValueMap<this>): void;
    willUpdate(changedProps: PropertyValueMap<this>): void;
    /** Auto-open the first header link that contains categorical nav
     * @internal
     */
    private _autoOpenFirstCategoricalLink;
    updated(changedProps: PropertyValueMap<this>): void;
    connectedCallback(): void;
    disconnectedCallback(): void;
}
declare global {
    interface HTMLElementTagNameMap {
        'kyn-header-nav': HeaderNav;
    }
}
//# sourceMappingURL=headerNav.d.ts.map