import { Renderable, Value } from '@tempots/dom';
export type StylePortalOptions = {
    id?: Value<string>;
    css: Value<string>;
};
/**
 * Injects a <style> tag with the provided CSS into <head> via Portal.
 * Ensures declarative, SSR/SSG-friendly styling without imperative DOM APIs.
 */
export declare const StylePortal: ({ id, css }: StylePortalOptions) => Renderable;
