import { HTMLAttributes } from 'react';
export interface WindowTitleProps extends HTMLAttributes<HTMLDivElement> {
    /** Primary title — rendered in bold. */
    title: string;
    /** Secondary subtitle — rendered smaller and dimmed below the title. */
    subtitle?: string;
}
/**
 * Two-line title + subtitle widget for use inside a `HeaderBar`.
 *
 * Pass as the `title` prop of `HeaderBar` to get a centred two-line header
 * that shows an app name and current document/view name.
 *
 * Mirrors `AdwWindowTitle`.
 *
 * @example
 * ```tsx
 * <HeaderBar title={<WindowTitle title="Files" subtitle="/home/user/Documents" />} />
 * ```
 *
 * @see https://gnome.pages.gitlab.gnome.org/libadwaita/doc/main/class.WindowTitle.html
 */
export declare function WindowTitle({ title, subtitle, className, ...props }: WindowTitleProps): import("react/jsx-runtime").JSX.Element;
