export declare const MARKDOWN_HEADING_SELECTOR = "h1, h2, h3";
export declare const MARKDOWN_HEADING_ID_PREFIX = "toruk-artifact-heading";
export declare const SCROLL_SPY_OFFSET_PX = 24;
export declare const HEADING_SCROLL_MARGIN_PX = 16;
export declare const SCROLL_BOTTOM_TOLERANCE_PX = 24;
export declare const REDUCED_MOTION_QUERY = "(prefers-reduced-motion: reduce)";
export declare const USER_SCROLL_INTENT_EVENTS: readonly ["wheel", "touchmove", "keydown", "pointerdown"];
export type TocItem = {
    id: string;
    text: string;
    level: number;
};
export declare function findScrollContainer(element: Element | null | undefined): HTMLElement | null;
export declare function getScrollViewportHeight(container: HTMLElement | null, view?: Window): number;
export declare function prepareHeadings(root: Element | null | undefined, prefix: string): HTMLElement[];
export declare function toTocItems(headings: readonly HTMLElement[]): TocItem[];
export declare function sameTocItems(a: readonly TocItem[], b: readonly TocItem[]): boolean;
export declare function isScrolledToEnd(container: HTMLElement | null, doc?: Document): boolean;
export declare function resolveActiveHeadingId(headings: readonly HTMLElement[], container: HTMLElement | null, doc?: Document): string | null;
export declare const tocIndentRem: (level: number) => number;
export declare function prefersReducedMotion(view?: Window): boolean;
export declare function scrollHeadingIntoView(heading: HTMLElement, view?: Window): void;