import type { ThemeTokens } from '../types/theme.types';
/** CSS custom-property prefix for every Photon design token. */
export declare const TOKEN_PREFIX = "--pg";
/** Converts a camelCase token key to kebab-case (`headerBackground` → `header-background`). */
export declare function toKebab(str: string): string;
/**
 * Recursively flattens a (possibly nested) token object into a map of full
 * CSS-variable names → string values, e.g. `{ colors: { headerBackground } }`
 * → `--pg-colors-header-background`. Exported so the AI Theme Registry derives
 * the exact same real variable names the injector produces.
 */
export declare function flattenTokens(obj: Record<string, unknown>, prefix: string, result: Map<string, string>): void;
/** Flattens a full {@link ThemeTokens} tree into a `--pg-*` → value map. */
export declare function flattenThemeTokens(tokens: ThemeTokens): Map<string, string>;
export declare class CssVarInjector {
    private styleEl;
    private scopeEl;
    inject(tokens: ThemeTokens, scopeEl?: HTMLElement): void;
    injectAsStylesheet(tokens: ThemeTokens, selector?: string): void;
    remove(): void;
    getVar(tokenPath: string): string;
}
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