export interface KeyframeDefinition {
    [offset: string]: Keyframe;
}
export interface TimelineOptions {
    duration?: number;
    easing?: string;
    delay?: number;
    fill?: FillMode;
}
export declare class AnimationTimeline {
    private animations;
    add(element: Element, keyframes: Keyframe[] | KeyframeDefinition, options?: TimelineOptions): this;
    play(): void;
    pause(): void;
    cancel(): void;
}
/**
 * Attach a scroll-linked timeline if supported (view-timeline). Falls back to no-op.
 */
export declare function attachScrollTimeline(element: HTMLElement, name?: string, axis?: 'block' | 'inline'): void;
/**
 * Prefer reduced motion: helper to disable ongoing animations
 */
export declare function respectReducedMotion(animations: Array<Animation>): void;
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