/**
 * Parse a CSS custom property value as a pixel number.
 * @param element - The element to read the computed style from
 * @param propertyName - The CSS custom property name (e.g., '--my-var')
 * @param fallback - Fallback value if parsing fails
 * @returns The parsed pixel value or fallback
 */
export declare function getCssPixelVar(element: HTMLElement, propertyName: string, fallback: number): number;