import { LitElement } from 'lit';
/**
 * @element ui-countdown
 * @description A countdown timer component that counts down to a target date
 *
 * @cssprop --countdown-bg - Background color
 * @cssprop --countdown-color - Text color
 * @cssprop --countdown-font-size - Main number font size
 * @cssprop --countdown-label-size - Label font size
 * @cssprop --countdown-label-color - Label text color
 * @cssprop --countdown-gap - Gap between time units
 * @cssprop --countdown-unit-bg - Individual unit background
 * @cssprop --countdown-unit-padding - Unit padding
 * @cssprop --countdown-unit-radius - Unit border radius
 * @cssprop --countdown-separator-color - Separator color
 *
 * @csspart container - The main container
 * @csspart unit - Each time unit block
 * @csspart value - The numeric value
 * @csspart label - The text label
 * @csspart separator - The separator between units
 *
 * @fires ui-complete - Fired when the countdown reaches zero
 *
 * @example
 * ```html
 * <ui-countdown
 *   targetDate="2026-12-31T23:59:59"
 *   variant="flip"
 *   showLabels
 * ></ui-countdown>
 * ```
 */
export declare class UICountdown extends LitElement {
    static styles: import("lit").CSSResult;
    /** Target date in ISO 8601 format */
    targetDate: string;
    /** Visual variant */
    variant: 'default' | 'compact' | 'flip' | 'minimal';
    /** Size */
    size: 'sm' | 'md' | 'lg';
    /** Whether to show unit labels */
    showLabels: boolean;
    /** Separator character */
    separator: string;
    /** Whether to start the timer automatically */
    autoStart: boolean;
    private _timeLeft;
    private _completed;
    private _intervalId;
    connectedCallback(): void;
    disconnectedCallback(): void;
    updated(changedProperties: Map<string, unknown>): void;
    /** Start the countdown */
    start(): void;
    /** Stop the countdown */
    stop(): void;
    private _tick;
    private _pad;
    render(): import("lit-html").TemplateResult<1>;
}
declare global {
    interface HTMLElementTagNameMap {
        'ui-countdown': UICountdown;
    }
}
//# sourceMappingURL=countdown.d.ts.map