/**
 * Copyright Aquera Inc 2023
 *
 * This source code is licensed under the BSD-3-Clause license found in the
 * LICENSE file in the root directory of this source tree.
 */
import { CSSResultArray, TemplateResult } from 'lit';
import NileElement from '../internal/nile-element';
/**
 * @summary The shell's left region — the navigation track; mirrors the shell's rail state so nav content can style against it.
 *
 * @status stable
 * @since 2.0
 *
 * @tag nile-app-shell-side-nav
 *
 * @dependency nile-app-shell
 *
 * @slot - The nav body. Scrolls.
 * @slot header - Pinned above the scroll region — a wordmark or product switcher.
 * @slot footer - Pinned below it — an account row or help link.
 *
 * @csspart header - The pinned header.
 * @csspart body - The scrolling nav body.
 * @csspart footer - The pinned footer.
 *
 * @cssproperty [--nile-app-shell-side-nav-padding=12px] - Body inset.
 * @cssproperty [--nile-app-shell-side-nav-bg=transparent] - Surface behind the nav; transparent so the nav and page share one.
 */
export declare class NileAppShellSideNav extends NileElement {
    static get styles(): CSSResultArray;
    private shellLink;
    /** Mirrors the shell's effective rail state. Set by the shell; treat it as read-only and style against it (`nile-app-shell-side-nav[collapsed] .label`). */
    collapsed: boolean;
    /** Id of the shell to follow. Defaults to the nearest ancestor. */
    shell?: string;
    connectedCallback(): void;
    protected willUpdate(): void;
    render(): TemplateResult;
}
export default NileAppShellSideNav;
declare global {
    interface HTMLElementTagNameMap {
        'nile-app-shell-side-nav': NileAppShellSideNav;
    }
}