/**
 * Internal dependencies
 */
import type { Keyframes } from '../types';
type CSSProperty = string | number | null | undefined;
interface CSSVariables {
    [key: `--${string}`]: CSSProperty;
}
/**
 * Get a key-value pair of custom CSS properties based on keyframes.
 *
 * The styles are used in the output's style[amp-custom].
 *
 * @param keyframes Keyframes.
 * @return Key value pair of initial styles.
 */
declare function getInitialStyleFromKeyframes(keyframes: Keyframes): CSSVariables;
export default getInitialStyleFromKeyframes;
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