import type { Slide, SlideTheme } from '../../types/slides';
import { type FikaStylePreset } from './styles';
export declare const INHERITED_STYLE_ID = "inherited";
/** True when the deck has authored content worth inheriting from. */
export declare function deckHasAuthoredStyle(slides: Slide[]): boolean;
/**
 * Derive a preset from the slides that already exist. Returns `undefined`
 * when there is too little authored content to read a style from.
 *
 * `canvasWidth` is the deck's viewport width; the returned scale is expressed
 * in the layout engine's 1000px reference so `buildLayoutSlide` can rescale it
 * for the actual canvas together with the built-in presets.
 */
export declare function inferStylePresetFromDeck(slides: Slide[], theme: Partial<SlideTheme> | undefined, canvasWidth: number): FikaStylePreset | undefined;