/**
 * Marker geometry: page-absolute scroll positions for an element's travel
 * and, for pinned elements, its pin stretch. Pure functions, no DOM: a
 * reimplementation of the driver's own enter/exit and pin-span math
 * (src/core/driver.ts computeView/pinSpan), kept independent on purpose
 * (debug is a separate entry, never imports core). Ponytail: this mirrors
 * the two edges the driver's default 75%/25% live band actually crosses,
 * not the full continuous -1..1 curve; enough to place ScrollTrigger-style
 * guide lines.
 */
export interface TravelGeo {
    top: number;
    bottom: number;
}
export interface TravelLines {
    /** Page Y where --sv-view first reaches 0 (the element goes live). */
    enter: number;
    /** Page Y where --sv-view reaches 1 (the element has fully exited). */
    exit: number;
}
export declare function readBand(raw: string | undefined, fallback: number): number;
export declare function travelLines(geo: TravelGeo, scrollY: number, vp: number, enter?: number, exit?: number): TravelLines;
export interface PinGeo {
    wrapperTop: number;
    wrapperHeight: number;
    stageHeight: number;
}
export interface PinLines {
    start: number;
    end: number;
}
/** Pin stretch start/end in page coordinates. Starts when the wrapper's top
 * reaches the pin offset; ends when the wrapper's bottom meets the stage's
 * border box (CLAUDE.md's pin-span rule: span = wrapper height minus stage
 * height, the offset already folded into the stage's own height). `origin`
 * is the stage's normal-flow offset the driver reads with readStageOrigin
 * (a heading or padding before the stage): the driver's own pin starts one
 * origin later and its span shortens by the same amount (driver.ts
 * pinSpan/computePin), so markers with no origin were off by exactly that
 * much whenever the stage was not the pinned element's first child
 * (ADU-354 item 10). */
export declare function pinLines(geo: PinGeo, scrollY: number, offset?: number, origin?: number): PinLines;