export type TOverlayPlacement = "center" | "top" | "bottom" | "left" | "right" | "top-left" | "top-right" | "bottom-left" | "bottom-right";
export type TOverlayRect = Readonly<{
    x: number;
    y: number;
    w: number;
    h: number;
}>;
export type TOverlayPlacementOptions = Readonly<{
    viewport: Pick<TOverlayRect, "w" | "h">;
    size: Pick<TOverlayRect, "w" | "h">;
    placement?: TOverlayPlacement;
    offsetX?: number;
    offsetY?: number;
    anchor?: TOverlayRect;
    shift?: boolean;
}>;
export declare function resolveOverlayPlacement(opts: TOverlayPlacementOptions): {
    x: number;
    y: number;
};
export type TOverlayFocusStack = {
    push: (id: string | null) => void;
    pop: () => string | null;
    peek: () => string | null;
    clear: () => void;
};
export declare function createOverlayFocusStack(): TOverlayFocusStack;