import type { Gradient, PPTElementOutline, PPTElementShadow, Slide, SlideBackground, SlideType } from '../types/slides';
/** Default accent swatches: 8 hues so Color + None + neutrals + custom fill a 7×2 grid. */
export declare const DEFAULT_THEME_COLORS: string[];
export interface PresetTheme {
    id?: string;
    name?: string;
    background: string;
    fontColor: string;
    featureFontColor?: string;
    /** Retain pale panels and accent roles when restyling host-authored decks. */
    preserveColorRoles?: boolean;
    fontname: string;
    colors: string[];
    /** Series palette when `colors` includes near-background swatches (Ink #171717). */
    chartColors?: string[];
    borderColor?: string;
    outline?: PPTElementOutline;
    shadow?: PPTElementShadow;
    contentBackground?: SlideBackground;
    featureBackground?: SlideBackground;
    altBackground?: SlideBackground;
    /** Matching vibe gradients. Layouts cycle these instead of light variants. */
    backgrounds?: SlideBackground[];
}
/** Unstyled deck: white slide, default accents. Not in the Themes grid. */
export declare const DEFAULT_PRESET_THEME: PresetTheme;
export declare const gradientToCss: (gradient: Gradient) => string;
export declare const slideBackgroundToStyle: (background?: SlideBackground, fallback?: string) => Record<string, string>;
export declare const FEATURE_SLIDE_TYPES: SlideType[];
export declare const isFeatureSlide: (type?: SlideType) => boolean;
/**
 * Duplicating the title slide copies `type: 'cover'` onto every copy, so theme
 * apply cannot trust cover/end after the first. Re-infer from position + layout.
 * Keep explicit `contents` / `transition` types.
 */
export declare const inferThemeSlideType: (slide: Slide, index: number, count: number) => SlideType;
export declare const themeBackgroundCycle: (theme: PresetTheme) => SlideBackground[];
export declare const resolvePresetBackground: (theme: PresetTheme, slideType?: SlideType, index?: number) => SlideBackground;
export declare const resolvePresetFontColor: (theme: PresetTheme, _slideType?: SlideType) => string;
export declare const themeChartColors: (theme: Pick<PresetTheme, 'colors' | 'chartColors'>) => string[];
export declare const matchPresetTheme: (themeColors: string[], presets?: readonly PresetTheme[]) => PresetTheme | undefined;
/** Paint a layout preview/insert with the active preset's type-specific background and type. */
export declare const applyPresetToLayoutSlide: (slide: Slide, theme: PresetTheme, index?: number) => void;
export declare const sameSlideBackground: (a?: SlideBackground, b?: SlideBackground) => boolean;
export declare const matchThemeBackgroundIndex: (theme: PresetTheme, background?: SlideBackground) => number;
export declare const PRESET_THEMES: PresetTheme[];