/**
 * animation — FPS-independent tweens (they use real dt), easing, and a keyed
 * clock that survives a re-render. The basis of spinner/progress/fade/typing/pulse.
 */
export type Easing = (t: number) => number;
export declare const Easing: {
    readonly linear: Easing;
    readonly easeIn: Easing;
    readonly easeOut: Easing;
    readonly easeInOut: Easing;
    readonly spring: Easing;
};
export interface TweenOptions {
    readonly from: number;
    readonly to: number;
    readonly duration: number;
    readonly easing?: Easing;
    readonly loop?: boolean | 'pingpong';
}
export interface Tween {
    readonly value: number;
    readonly done: boolean;
    update(dtMs: number): void;
    reset(): void;
}
export declare function tween(options: TweenOptions): Tween;
export interface AnimationClock {
    register(key: string, tween: Tween): void;
    has(key: string): boolean;
    phase(key: string): number;
    remove(key: string): void;
    tick(dtMs: number): void;
    readonly active: boolean;
}
export declare function createAnimationClock(): AnimationClock;
/** Frames de spinner nomeados (dots, line, arc, bounce, pulse). */
export declare const spinnerFrames: Readonly<Record<string, readonly string[]>>;
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