/**
 * Theme utility functions
 */
/**
 * Normalizes a theme value to ensure it's always 'light' | 'dark'
 * @param theme - Theme value (may be 'light' | 'dark' | string | undefined)
 * @returns Normalized 'light' | 'dark' theme (defaults to 'light')
 */
export declare const normalizeTheme: (theme?: string | null) => "light" | "dark";
/**
 * Normalizes a color scheme value to ensure it's always 'light' or 'dark'
 * Handles null/undefined cases with proper fallback chain
 *
 * @param colorScheme - The color scheme from useColorScheme() hook (may be null/undefined)
 * @param theme - Optional theme prop as fallback
 * @returns Normalized 'light' | 'dark' color scheme
 *
 * @example
 * ```ts
 * const colorScheme = normalizeColorScheme(useColorScheme(), theme);
 * ```
 */
export declare const normalizeColorScheme: (colorScheme?: string | null, theme?: string) => "light" | "dark";
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