/**
 * Hover hosts need `position: relative` + `overflow: hidden` so the injected
 * background/curve sits inside the element's box and is clipped to it, and
 * `isolation: isolate` so the injected element's `z-index: -1` resolves
 * inside the host's stacking context — placing it behind the host's own
 * content without falling through to the page background. We only touch
 * styles the host doesn't already provide, and remember what we set so
 * `restoreHost()` can put it back exactly on dispose.
 */
export interface HostRestore {
    position?: string;
    overflow?: string;
    isolation?: string;
}
export declare function prepareHost(host: HTMLElement): HostRestore;
export declare function restoreHost(host: HTMLElement, restore: HostRestore): void;
/**
 * Like `prepareHost` but only ensures a positioning context, never touches
 * overflow. Also forces `isolation: isolate` so the host owns its stacking
 * context — letting the injected underline bar use `z-index: -1` to paint
 * behind the host's own text without falling through to the page background.
 * Used by effects that inject absolutely-positioned children but must coexist
 * with the author's own overflow value (e.g. underline bars inside hosts that
 * may already use overflow for other reasons).
 */
export declare function ensurePositioned(host: HTMLElement): HostRestore;
//# sourceMappingURL=host.d.ts.map