import React from 'react';
import type { BackdropProps } from './types';
/**
 * Backdrop — full-screen Portal-rendered scrim.
 *
 * Fades in/out over 200 ms (motion short2). Mounted via Portal so it always
 * appears above the full view tree. Respects reduce-motion.
 */
export declare function Backdrop(rawProps: BackdropProps): React.ReactElement | null;
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