/**
 * Creates an isolated Shadow DOM host attached to document.body.
 * All SDK UI lives inside this shadow root so partner CSS cannot
 * bleed in and SDK CSS cannot bleed out.
 */
export declare function createShadowHost(id: string): {
    host: HTMLElement;
    root: ShadowRoot;
};
/**
 * Creates a shadow host inserted immediately after `anchorEl` in the DOM.
 * Used for the inline paywall panel so it flows naturally below the content.
 */
export declare function createInlineShadowHost(id: string, anchorEl: HTMLElement): {
    host: HTMLElement;
    root: ShadowRoot;
};
export declare function removeShadowHost(id: string): void;
/** Inject a <style> tag into a shadow root */
export declare function injectStyles(root: ShadowRoot, css: string): void;