import { type EntranceStyle, type RowRole } from '../official/chatDom.js';
/**
 * Entrance keyframes, duration, and easing per style. Opacity always arrives on
 * the shorter side and travel or scale on the longer one, which reads as the row
 * settling rather than sliding to a stop.
 *
 * Durations follow the motion-tokens scale by intent: a transient row is
 * `standard` (280–350ms), a full welcome surface is `medium` (400–500ms), and an
 * opacity-only fade is `fast` (150–200ms). Travel and scale styles land on
 * EASE_SETTLE (3% overshoot), sideways travel and the large welcome surface stay
 * on EASE_GLIDE, and opacity-only work uses EASE_FADE.
 */
export declare const ENTRANCE: Record<EntranceStyle, {
    frames: Keyframe[];
    durationMs: number;
    easing: string;
}>;
/**
 * Pure: the entrance spec (keyframes, duration, easing) for a transcript style.
 *
 * Exported so the settings page can play the very same entrance in its preview
 * instead of keeping a second copy of the keyframes — a preview that drifts from
 * the engine is worse than no preview, because it teaches the wrong thing.
 */
export declare function entranceSpec(style: EntranceStyle): {
    frames: Keyframe[];
    durationMs: number;
    easing: string;
};
/**
 * Role entrances. The user's message travels sideways on the glide curve (280ms,
 * `standard` band): it reads as having been sent from the composer, and sideways
 * travel is too directional for the 3% overshoot of EASE_SETTLE. Process rows
 * get the lightest arrival in the set — 3px of travel on an opacity-only curve
 * (200ms, `fast` band) — because a busy turn mounts several of them and anything
 * stronger turns the transcript into a slideshow.
 */
export declare const ROLE_ENTRANCE: Record<RowRole, {
    frames: Keyframe[];
    durationMs: number;
    easing: string;
    cls: string;
}>;
/** Transcript-column entrance; the column stays mounted across switches. */
export declare const PANEL_FRAMES: readonly Keyframe[];
export declare const PANEL_DURATION_MS = 320;