export declare const STICKY_HEADER_CELL = ".fc-scrollgrid-section-header.fc-scrollgrid-section-sticky > *";
/** The kit Calendar's create, Move and Copy banner. */
export declare const MODE_BANNER = "[data-calendar-mode-banner]";
/** The box `position: sticky` resolves against: the nearest ancestor that
 *  is a scroll container (`clip` is not one), or null for the viewport. */
export declare function stickyScrollport(el: Element): Element | null;
/** How far the header sits below its natural `top: 0` to clear the nav. The
 *  kit resets `.fc-view` and its table; any other host scroll container
 *  still yields 0, as an offset there covers the all-day lane. */
export declare function stickyHeaderOffset(navigation: HTMLElement, header: Element | null): number;
export interface StickyOffsets {
    /** `--inc1-nav-offset`: the nav alone, as the header sees it. */
    nav: number;
    /** `--inc1-banner-top`: where the mode banner parks. */
    bannerTop: number;
    /** `--inc1-header-offset`: the nav plus a banner in the header's scrollport. */
    header: number;
    /** `--inc1-pinned-block-size`: everything pinned above the grid's events. */
    pinned: number;
}
/** Every sticky offset the surface needs, from one measurement. */
export declare function stickyOffsets(navigation: HTMLElement, header: Element | null, banner: Element | null): StickyOffsets;
/** Keeps the sticky offsets on `surface` current; re-measures on resize and
 *  when the header or banner is inserted or replaced. A runtime `overflow`
 *  change with no resize is not seen: remount. Returns the cleanup. */
export declare function trackStickyHeaderOffset(navigation: HTMLElement, surface: HTMLElement): () => void;
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