/**
 * CSS Variables Theme Provider
 * Implements theming using CSS custom properties
 */
import type { IThemeProvider } from '../../spi/index.js';
import type { ThemeMode, ThemeConfig } from '../../api/index.js';
export declare class CSSVariablesThemeProvider implements IThemeProvider {
    private mediaQuery?;
    private listeners;
    applyTheme(mode: ThemeMode, config: ThemeConfig): void;
    getSystemPreference(): 'light' | 'dark';
    onSystemThemeChange(callback: (theme: 'light' | 'dark') => void): () => void;
    destroy(): void;
    private handleMediaQueryChange;
}
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