/**
 * Motion policy.
 *
 * `prefers-reduced-motion` is honoured globally and by default, degrading to
 * instant state changes rather than to broken layouts. The sibling Apex products
 * already behave this way, so ApexMaps inherits the rule rather than inventing a
 * different one.
 *
 * @module utils/motion
 */
/**
 * True when the user has asked for reduced motion, or when there is no window to
 * ask (SSR), where animation is meaningless anyway.
 */
export declare function prefersReducedMotion(): boolean;
/**
 * A `chart.animations.speed` value in milliseconds.
 *
 * The keywords exist because "350 or 700?" is a design decision most callers
 * should not have to make: `'normal'` is the felt-as-instant range for a data
 * update, `'slow'` is presentation pace, `'fast'` acknowledges the change
 * without asking the reader to watch it.
 */
export declare function resolveSpeed(speed: 'slow' | 'normal' | 'fast' | 'instant' | number | undefined): number;
/**
 * Routes past which a flow layer is painted but not animated.
 *
 * A flow cannot ride the mark budget below, because it is not a transition that
 * ends: it is a repaint of every dashed geodesic on the map, every frame, for as
 * long as the page is open. So it gets a ceiling of its own, an order of
 * magnitude lower, and above it the beads stay where they are. A dotted route
 * still reads as a route, which is a better failure than a map that drops frames
 * forever.
 */
export declare const FLOW_BUDGET = 600;
export interface MotionBudget {
    animate: boolean;
    properties: 'all' | 'cheap';
    reason?: string;
}
/**
 * A motion budget: above a mark threshold, animate only cheap properties
 * (opacity, fill) and skip per-vertex work. Degrading *which* properties animate
 * is preferable to dropping frames, because dropped frames read as a bug while a
 * simpler transition just reads as restraint.
 */
export declare function motionBudget(markCount: number, { fullBudget, reducedBudget, }?: {
    fullBudget?: number;
    reducedBudget?: number;
}): MotionBudget;
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