/**
 * Extract font names from a CSS font-family string
 *
 * @param fontStack - CSS font-family value
 * @returns Array of individual font names
 */
export declare function parseFontStack(fontStack: string): string[];
/**
 * Identify which fonts in a font stack are likely custom fonts
 *
 * @param parsedFonts - Array of font names
 * @returns Array of potential custom fonts
 */
export declare function identifyCustomFonts(parsedFonts: string[]): string[];
/**
 * Check if a font file exists in the fonts directory
 * This is a simplified implementation for client-side
 *
 * @param fontName - Name of the font to check
 * @param extensions - File extensions to try
 * @returns Path to the font file if found, null otherwise
 */
export declare function findFontFile(fontName: string, extensions?: string[]): Promise<string | null>;
/**
 * Load custom fonts for use with Pixi.js
 *
 * @param fontStack - CSS font-family value
 * @returns Promise resolving to an array of successfully loaded font paths
 */
export declare function loadCustomFonts(fontStack: string): Promise<string[]>;
/**
 * Create @font-face CSS rules for custom fonts
 * This is needed for proper text rendering in Pixi.js
 *
 * @param fontPaths - Array of paths to font files
 * @returns CSS string with @font-face rules
 */
export declare function createFontFaceCSS(fontPaths: string[]): string;
/**
 * Add @font-face rules to the document head
 *
 * @param css - CSS string with @font-face rules
 */
export declare function injectFontFaceCSS(css: string): void;
/**
 * Main function to handle custom font loading for KineticSlider
 *
 * @param titleFontStack - Title font-family value
 * @param subtitleFontStack - Subtitle font-family value
 * @returns Promise resolving when fonts are loaded
 */
export declare function setupCustomFonts(titleFontStack?: string, subtitleFontStack?: string): Promise<void>;