/**
 * WP2 — Layout engine. Layout tree → nested CSS-grid DOM.
 *
 * Takes a fully-expanded `LayoutNode` (the parser has already expanded any
 * preset alias), so this module depends only on ./types — nothing else.
 * Pure string building; no DOM API.
 *
 * See BUILD-PLAN.md WP2 and docs/dom-contract.md ("Layout grid (WP2 output)").
 */
import type { LayoutNode, GridRender } from './types.js';
/**
 * Render a layout tree to nested grid DOM with empty region cells.
 * Returns the inner HTML for `.orz-content` and the region names in order.
 */
export declare function renderLayout(node: LayoutNode): GridRender;