/**
 * Typography Scales
 * -----------------
 * Maintains a registry of type scales sourced from defaults and design tokens.
 */
export interface TypographyScaleDefinition {
    fontSize: string;
    lineHeight: string;
    letterSpacing?: string;
    fontWeight?: string | number;
    fontFamily?: string;
}
export type TypographyScaleName = string;
export declare function registerScale(name: TypographyScaleName, definition: TypographyScaleDefinition): void;
export declare function extendScales(partial: Record<TypographyScaleName, Partial<TypographyScaleDefinition>>): void;
export declare function getScale(name: TypographyScaleName): TypographyScaleDefinition;
export declare function getScaleNames(): TypographyScaleName[];
export declare function onScalesChange(listener: (name: TypographyScaleName, definition: TypographyScaleDefinition) => void): () => void;
export declare function hasTokenDrivenScales(): boolean;
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