import { LitElement } from 'lit';
/**
 * A container component for the card's header section.
 * Displays header content including an optional thumbnail, title, subtitle, and additional content.
 *
 * @element igc-card-header
 *
 * @slot thumbnail - Renders header media such as an icon or small image.
 * @slot title - Renders the card title (typically a heading element).
 * @slot subtitle - Renders the card subtitle (typically a smaller heading or text).
 * @slot - Renders additional content displayed next to the title area.
 *
 * @csspart header - The card header text container.
 * @csspart title - The title slot wrapper.
 * @csspart subtitle - The subtitle slot wrapper.
 *
 * @example
 * ```html
 * <igc-card-header>
 *   <igc-avatar slot="thumbnail" initials="AB"></igc-avatar>
 *   <h3 slot="title">Card Title</h3>
 *   <h5 slot="subtitle">Card Subtitle</h5>
 * </igc-card-header>
 * ```
 */
export default class IgcCardHeaderComponent extends LitElement {
    static readonly tagName = "igc-card-header";
    static styles: import("lit").CSSResult[];
    static register(): void;
    constructor();
    protected render(): import("lit-html").TemplateResult<1>;
}
declare global {
    interface HTMLElementTagNameMap {
        'igc-card-header': IgcCardHeaderComponent;
    }
}