import type { Plugin } from "vite";
/**
 * Vite plugin that injects compiled theme CSS as a global constant.
 *
 * Equivalent of the webpack `injectThemeCss` export from `@webiny/website-builder-nextjs/webpack`,
 * but targeting Vite / Nuxt projects.
 *
 * The plugin reads `entry` (a CSS file), inlines all `@import` statements via PostCSS, then
 * exposes the result as the constant `variableName` (default: `__THEME_CSS__`). Use it in your
 * theme definition:
 *
 * ```ts
 * // src/theme/theme.ts
 * declare const __THEME_CSS__: string;
 * export const theme = createTheme({ css: __THEME_CSS__, fonts: [...], ... });
 * ```
 *
 * Register in `nuxt.config.ts`:
 *
 * ```ts
 * import { injectThemeCss } from "@webiny/website-builder-nuxt/vite";
 *
 * export default defineNuxtConfig({
 *   vite: {
 *     plugins: [await injectThemeCss("./src/theme/theme.css")]
 *   }
 * });
 * ```
 *
 * In development mode the plugin watches the entry file and restarts the Vite dev server
 * automatically when the CSS changes (required because Vite evaluates `define` replacements
 * at server startup rather than on every request).
 */
export declare const injectThemeCss: (entry: string, variableName?: string) => Promise<Plugin>;