/**
 * @license
 *
 * Copyright IBM Corp. 2026
 *
 * This source code is licensed under the Apache-2.0 license found in the
 * LICENSE file in the root directory of this source tree.
 */
import { LitElement, PropertyValues } from 'lit';
import '@carbon/web-components/es/components/modal/index.js';
import '@carbon/web-components/es/components/icon-button/index.js';
import '../truncated-text';
declare const CDSTearsheetHeaderContent_base: {
    new (...args: any[]): {
        _handles: Set<import("@carbon/web-components/es/globals/internal/handle").default>;
        connectedCallback(): void;
        disconnectedCallback(): void;
    };
    _hostListeners: {
        [listenerName: string]: {
            [type: string]: {
                options?: boolean | AddEventListenerOptions;
            };
        };
    };
} & typeof LitElement & (new (...args: any[]) => import("@lit-labs/signals").SignalWatcherApi);
/**
 * Tearsheet Header Content component - Contains the title, description, and decorative elements.
 *
 * @element c4p-tearsheet-header-content
 * @slot label - Optional label text above the title
 * @slot title-start - Content before the title (e.g., icons)
 * @slot title-end - Content after the title (e.g., badges, tags)
 * @slot description - Custom description content below the title
 * @slot decorator - AI label or other decorative elements
 */
declare class CDSTearsheetHeaderContent extends CDSTearsheetHeaderContent_base {
    slot: string;
    /**
     *  The main title of the tearsheet.
     */
    title: string;
    /**
     * Internal ID for the title element (auto-generated, used for aria-labelledby on the modal)
     */
    private _titleId;
    /**
     * Public getter for the title ID (used by parent tearsheet for aria-labelledby)
     */
    get titleId(): string;
    private _titleStartSlot?;
    private _titleEndSlot?;
    private _decoratorSlot?;
    private _hasTitleStart;
    private _hasTitleEnd;
    private _hasDecorator;
    private _hasAILabel;
    private _isMobileOrNarrow;
    private mdMediaQuery;
    private isMobileDevice;
    private get isNarrowVariant();
    /**
     * Returns the first focusable element in the header for the focus trap.
     
     * Priority by screen size:
     *   Large (desktop): header-actions button → close button → AI label
     *   Small (mobile):  AI label → close button → header-actions button
     */
    getFirstFocusable(): HTMLElement | null;
    protected firstUpdated(_changedProperties: PropertyValues): void;
    protected updated(_changedProperties: PropertyValues): void;
    /**
     * Applies `inert` to collapsed header regions so they are removed from
     * the tab order and AT tree. CSS alone (opacity:0 / max-block-size:0)
     * does not prevent keyboard focus on hidden elements.
     *
     * Collapsed regions:
     *   - Everything in header-content except the title wrapper
     *     (description, label, extra slot content, "Read more" button)
     *   - Header-actions on small/narrow screens
     */
    private _updateInertState;
    private _checkSlots;
    private _handleSlotChange;
    private _handleDecoratorChange;
    private _updateDecoratorSize;
    private _updateHeaderOffset;
    render(): import("lit-html").TemplateResult<1>;
    static styles: any;
}
export default CDSTearsheetHeaderContent;
//# sourceMappingURL=tearsheet-header-content.d.ts.map