/**
 * Resolve a custom font's `@font-face` sources: an explicit `styles` array
 * wins; a bare `url` becomes one normal/normal face. Emission (CSS string,
 * CSSStyleSheet rule, data-URL embedding) stays with the caller — this only
 * normalizes WHAT faces exist.
 */
export interface FontFaceStyle {
    src: string;
    fontStyle: string;
    fontWeight: string;
}
export declare function resolveFontFaceStyles(font: {
    url?: string;
    styles?: Array<{
        src: string;
        fontStyle?: string;
        fontWeight?: string;
    }>;
}): FontFaceStyle[];