import React from "react";
export interface AppearProps {
    children: React.ReactNode;
    /** Step index at which this element appears (1-based). Defaults to auto-assigned. */
    stepIndex?: number;
    /** Style applied when visible */
    activeStyle?: React.CSSProperties;
    /** Style applied when hidden */
    inactiveStyle?: React.CSSProperties;
}
/**
 * Appear component — shows children at a given step.
 *
 * Registers one step with the deck. Children are hidden (opacity 0)
 * until the step is reached, then fade in.
 */
export declare function Appear({ children, activeStyle, inactiveStyle, }: AppearProps): import("react/jsx-runtime").JSX.Element;