/**
 * The **Toast Container** — owns the fixed, viewport-level layer and the six
 * per-position stacking regions that toasts mount into. Regions are created
 * lazily (a page that only ever shows bottom-right toasts allocates one region)
 * and the layer itself is `pointer-events: none` so it never blocks the app;
 * only the individual toasts re-enable pointer events.
 *
 * Insertion order places the newest toast nearest its docked edge (top regions
 * grow downward, bottom regions grow upward), configurable via `newestOnTop`.
 * All positioning/spacing is theme-driven CSS (`toast.css.ts`); this class only
 * sets the gap custom property.
 *
 * @packageDocumentation
 */
import { ToastPosition } from './toast.types';
/** Manages the toast layer and its per-position regions. */
export declare class ToastContainer {
    private readonly host;
    private gap;
    private newestOnTop;
    private layerEl;
    private readonly regions;
    /**
     * @param host        - The element the layer is appended to (default `document.body`).
     * @param gap         - Gap between stacked toasts, in px.
     * @param newestOnTop - Render the newest toast nearest its docked edge.
     */
    constructor(host: HTMLElement, gap: number, newestOnTop: boolean);
    /** Updates the inter-toast gap (applied via a CSS custom property). */
    setGap(gap: number): void;
    /** Updates the newest-on-top ordering policy for subsequent mounts. */
    setNewestOnTop(value: boolean): void;
    /** Lazily creates the viewport layer. */
    private ensureLayer;
    /** Lazily creates the region for a position. */
    private ensureRegion;
    /**
     * Mounts a toast element at a position, ordered so the newest sits nearest the
     * docked edge.
     *
     * @param position - The docked position.
     * @param el       - The toast root element.
     */
    mount(position: ToastPosition, el: HTMLElement): void;
    /**
     * Removes a toast element from the DOM.
     *
     * @param el - The toast root element.
     */
    unmount(el: HTMLElement): void;
    /** Removes the layer and all regions. */
    destroy(): void;
}
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