/**
 * Branding Resolution
 *
 * Resolves branding config with defaults and generates CSS variables.
 *
 * @module @kya-os/consent/resolution/resolve-branding
 */
import type { ConsentBranding, ResolvedConsentBranding, ConsentCSSVars } from "../types/branding.types.js";
/**
 * Validate hex color format
 *
 * @param color - Color string to validate
 * @returns True if valid hex color
 */
export declare function isValidHexColor(color: string | undefined): color is string;
/**
 * Sanitize a color value, returning default if invalid
 *
 * @param color - Color to sanitize
 * @param defaultColor - Default if invalid
 * @returns Valid hex color
 */
export declare function sanitizeColor(color: string | undefined, defaultColor: string): string;
/**
 * Validate URL format
 *
 * @param url - URL string to validate
 * @returns True if valid http/https URL
 */
export declare function isValidUrl(url: string | undefined): url is string;
/**
 * Sanitize a URL value, returning undefined if invalid
 *
 * @param url - URL to sanitize
 * @returns Valid URL or undefined
 */
export declare function sanitizeUrl(url: string | undefined): string | undefined;
/**
 * Generate CSS variables from branding
 *
 * @param branding - Resolved branding config
 * @returns CSS variable object
 */
export declare function generateBrandingCSSVars(branding: {
    primaryColor: string;
    secondaryColor: string;
}): ConsentCSSVars;
/**
 * Resolve branding config with defaults and validation
 *
 * @param branding - Partial branding config
 * @returns Fully resolved branding with CSS variables
 */
export declare function resolveConsentBranding(branding?: ConsentBranding): ResolvedConsentBranding;
/**
 * Check if branding has custom values (non-default)
 *
 * @param branding - Branding config
 * @returns True if any custom values are set
 */
export declare function hasCustomBranding(branding?: ConsentBranding): boolean;
/**
 * Merge branding configs (later values override earlier)
 *
 * @param base - Base branding config
 * @param override - Override values
 * @returns Merged branding
 */
export declare function mergeBranding(base: ConsentBranding, override?: ConsentBranding): ConsentBranding;
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