/**
 * CSS Custom Properties Generator
 *
 * Converts a ThemeInterface into a flat map of CSS custom properties.
 * Enables theme values to be consumed via var(--theme-*) in plain CSS,
 * CSS modules, or non-styled-components contexts.
 */
import type { ThemeInterface } from '../types/ThemeInterface';
/**
 * Flatten a ThemeInterface into a Record of CSS custom property names to values.
 *
 * @param theme - The theme adapter to flatten
 * @param prefix - CSS var prefix (default: 'theme')
 * @returns Record mapping `--{prefix}-{section}-{path}` to string values
 *
 * @example
 * ```typescript
 * const vars = flattenThemeToCssVars(cyberpunkAdapter)
 * // vars['--theme-color-primary-main'] === '#ff00ff'
 * // vars['--theme-spacing-md'] === '1rem'
 * // vars['--theme-type-font-family-heading'] === '"Courier New", ...'
 * ```
 */
export declare function flattenThemeToCssVars(theme: ThemeInterface, prefix?: string): Record<string, string>;
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