/**
 * Spacing System - Golden Ratio (φ = 1.618)
 *
 * All spatial rhythm follows the golden ratio for mathematical elegance.
 *
 * @see /STANDARDS.md - Section 1.3 Spacing System
 */
export declare const spacing: {
    readonly xs: "0.5rem";
    readonly sm: "1rem";
    readonly md: "1.618rem";
    readonly lg: "2.618rem";
    readonly xl: "4.236rem";
    readonly '2xl': "6.854rem";
    readonly '3xl': "11.089rem";
};
export type SpacingKey = keyof typeof spacing;
/**
 * Get spacing value by key
 */
export declare function getSpacing(key: SpacingKey): string;
/**
 * CSS custom property names for spacing
 */
export declare const spacingVars: {
    readonly xs: "--space-xs";
    readonly sm: "--space-sm";
    readonly md: "--space-md";
    readonly lg: "--space-lg";
    readonly xl: "--space-xl";
    readonly '2xl': "--space-2xl";
    readonly '3xl': "--space-3xl";
};
/**
 * Generate CSS custom properties string
 */
export declare function generateSpacingCSS(): string;