import { type PanelOptions } from './sidebar';
import type { Zine } from '../zine';
/**
 * A rail of page thumbnails beside the book.
 *
 * Rows mirror the book's own spread model, so a `double` book shows two pages per row and a
 * `single` book one — including the responsive fallback that forces single-page on a narrow
 * container. A book that mixes the two (`cover`, `book`) keeps two columns so pairs line up, and
 * centres its lone first/last page between them. Clicking a row turns to that spread.
 *
 * Pages are drawn only as they scroll into view: a long PDF would otherwise decode every page at
 * once the moment the rail opened.
 */
export declare class Thumbnails {
    #private;
    /** The panel's themed root, so the toolbar can stamp its colour scheme. */
    readonly root: HTMLElement;
    constructor(zine: Zine, container: HTMLElement, options?: PanelOptions);
    destroy(): void;
}