import { NmiTheme, LayoutSpacing, TextSize, RadiusSize, Appearance } from '../types';
/**
 * Flattens a nested NmiTheme object into CSS custom properties
 *
 * @param theme The nested theme object
 * @returns A flattened object with CSS custom property keys (--nmi-path-to-value)
 *
 * Example:
 * Input: { layout: { radius: { small: '4px' } } }
 * Output: { '--nmi-layout-radius-small': '4px' }
 */
export declare const flattenTheme: (theme: NmiTheme) => Record<string, string>;
/**
 * Recursively merges two theme objects, with the second theme taking precedence
 *
 * @param baseTheme The base theme object
 * @param overrideTheme The override theme object with higher priority
 * @returns A new theme object with merged values
 */
export declare const mergeThemes: (baseTheme: NmiTheme, overrideTheme: Partial<NmiTheme>) => NmiTheme;
/**
 * Resolves a theme object with optional overrides
 *
 * @param theme The base theme to use
 * @param overrides Optional overrides to apply on top of the theme
 * @returns The flattened theme with overrides applied
 */
export declare const resolveTheme: (theme: NmiTheme, overrides?: Record<string, string>) => Record<string, string>;
/**
 * Apply scaling to theme based on layout spacing, text size, and radius size
 */
export declare const applyScalingToTheme: (theme: NmiTheme, layoutSpacing?: LayoutSpacing, textSize?: TextSize, radiusSize?: RadiusSize) => NmiTheme;
/**
 * Apply radius size scaling to a theme
 */
export declare const applyRadiusScaling: (theme: NmiTheme, radiusSize?: RadiusSize) => NmiTheme;
/**
 * Processes an appearance object into CSS variables for styling components
 * Combines theme selection, scaling, merging, and flattening into a single utility
 *
 * @param appearance The appearance configuration object
 * @returns A flattened object with CSS custom property keys and values
 */
export declare const processAppearanceToCssVars: (appearance?: Appearance) => Record<string, string>;