import { Placement } from '@floating-ui/dom';
import { LitElement, PropertyValues, TemplateResult, CSSResult } from 'lit';
declare global {
    interface HTMLElementTagNameMap {
        'forge-ai-overlay': ForgeAiOverlayComponent;
    }
    interface HTMLElementEventMap {
        'forge-ai-overlay-toggle': CustomEvent<{
            open: boolean;
            newState: string;
            oldState: string;
        }>;
    }
}
export type OverlayPlacement = Placement;
export type OverlayOffset = number | {
    mainAxis?: number;
    crossAxis?: number;
    alignmentAxis?: number;
};
/**
 * @summary A low-level overlay component for internal use within AI components.
 *
 * @slot - The default slot for overlay content.
 */
export declare class ForgeAiOverlayComponent extends LitElement {
    static styles: CSSResult;
    /**
     * The anchor element to position the overlay relative to.
     */
    anchor: Element | null;
    /**
     * The placement of the overlay relative to the anchor.
     */
    placement: OverlayPlacement;
    /**
     * Whether the overlay should flip to the opposite side when there's no space.
     */
    flip: boolean;
    /**
     * Whether the overlay should shift to stay in view.
     */
    shift: boolean;
    /**
     * Whether the overlay is open.
     */
    open: boolean;
    /**
     * The arrow element to position relative to the overlay.
     */
    arrowElement: HTMLElement | null;
    /**
     * The offset of the overlay from the anchor element.
     * Can be a number (main axis offset) or an object with mainAxis, crossAxis, and alignmentAxis properties.
     */
    offset: OverlayOffset | undefined;
    /**
     * The dismiss mode for the overlay.
     * - 'auto': Automatically closes on outside clicks and Escape key
     * - 'manual': Requires manual control to close
     */
    dismissMode: 'auto' | 'manual';
    private _overlayElement;
    private _cleanupAutoUpdate;
    disconnectedCallback(): void;
    updated(changedProperties: PropertyValues<this>): void;
    private _handleOpenChange;
    private _showOverlay;
    private _hideOverlay;
    private _updatePosition;
    private _computePosition;
    private _roundByDPR;
    private _cleanup;
    private _onToggle;
    render(): TemplateResult;
}