import { AlertOptions, AlertVariant } from './alert.types';
/**
 * Headless alert/callout controller. Sets the appropriate ARIA live semantics
 * for the variant, reflects `data-variant` / `data-state`, and (when a
 * `[data-c42-alert-dismiss]` element is present) wires dismissal. It never
 * applies visual styles — variant colors live in CSS keyed off `data-variant`.
 *
 * Markup:
 * ```html
 * <div data-c42-alert data-variant="warning">
 *   <span data-c42-alert-icon aria-hidden="true">⚠</span>
 *   <div data-c42-alert-content>
 *     <strong data-c42-alert-title>Heads up</strong>
 *     <p data-c42-alert-description>Your trial ends soon.</p>
 *   </div>
 *   <button data-c42-alert-dismiss aria-label="Dismiss">×</button>
 * </div>
 * ```
 */
export declare class Alert {
    private readonly root;
    private readonly dismissBtn;
    private variant;
    private readonly roleOverride;
    private dismissed;
    private cleanups;
    constructor(root: HTMLElement, options?: AlertOptions);
    private normalizeVariant;
    private applyVariant;
    /** Change the variant; updates `data-variant` and ARIA live semantics. */
    setVariant(variant: AlertVariant): void;
    get currentVariant(): AlertVariant;
    /** Hide the alert and emit `alert:dismiss`. No-op if already dismissed. */
    dismiss(): void;
    /** Re-show a dismissed alert. */
    show(): void;
    /** Subscribe to a DOM event on the root element. Returns an unsubscribe fn. */
    on<E extends Event = Event>(event: string, handler: (event: E) => void): () => void;
    destroy(): void;
}