/**
 * Hosts a drop's markup and CSS, byte-identical, inside a stage's host element.
 *
 * The `html`/`css` strings are the DESIGN'S OWN vendored bytes (imported at build
 * time, e.g. vite `?raw`) — injecting them verbatim is the point, not a hole in
 * the vocabulary: this module renders design-owned code, it never writes
 * integration data. Data enters only through the seam's applier.
 *
 * `shadow: true` (default) isolates the drop's CSS from the shell skin.
 */
/**
 * @param {object} options
 * @param {Element} [options.host]
 * @param {string} options.html
 * @param {readonly string[]} [options.css]
 * @param {boolean} [options.shadow]
 * @returns {{ root: ParentNode & Element | ShadowRoot, dispose(): void }}
 */
export function mountDropFragment({ host, html, css, shadow }: {
    host?: Element | undefined;
    html: string;
    css?: readonly string[] | undefined;
    shadow?: boolean | undefined;
}): {
    root: (ParentNode & Element) | ShadowRoot;
    dispose(): void;
};