/** A situation group within one section. Declaration order is lane order. */
export interface ScreenLaneDef {
    /** Unique within its section. */
    id: string;
    /** Human-readable, in the host's language — drawn as the lane caption. */
    label: string;
    /** The section this lane belongs to, matched against `page.section`. */
    section: string;
    /** Caption rule colour. Defaults to the neutral caption colour. */
    accent?: string;
}
export interface ScreenLaneDiagnostic {
    severity: 'error' | 'warning';
    laneId: string;
    message: string;
}
export declare const LANE_CAPTION_STYLE: {
    /** Rule width and the gap between rule and text. */
    readonly ruleWidth: 4;
    readonly gap: 10;
    /** Caption band height, and the space between caption and the first label. */
    readonly height: 26;
    readonly marginBottom: 14;
    readonly fontSize: 17;
    readonly fontWeight: 700;
    readonly color: "#6b6b76";
    readonly accent: "#b8b8c2";
    readonly countColor: "#a1a1b3";
    readonly countSize: 14;
};
/**
 * Lane layout constants. `maxFramesPerRow` is what a designer can take in
 * without panning at overview zoom — six 1280px screens is about one viewport
 * — so a longer lane wraps into continuation rows rather than running off.
 */
export declare const LANE_LAYOUT: {
    readonly gap: 80;
    readonly laneGap: 210;
    readonly maxFramesPerRow: 6;
};
/** The implicit lane that collects frames no declaration placed. */
export declare const UNDECLARED_LANE_ID = "";
export declare function validateScreenLanes(lanes: readonly ScreenLaneDef[], context?: {
    sections?: readonly string[];
}): ScreenLaneDiagnostic[];
/** One editor's declared screen lanes. */
export declare function createFrameLanes(): {
    setScreenLanes: (lanes: readonly ScreenLaneDef[] | undefined) => void;
    getScreenLanes: () => readonly ScreenLaneDef[];
    lanesForSection: (section: string) => ScreenLaneDef[];
    laneCaptionFor: (section: string, laneId: string) => ScreenLaneDef | null;
    groupByLane: <T extends {
        lane?: string;
    }>(section: string, frames: readonly T[]) => {
        laneId: string;
        frames: T[];
    }[];
};
export type FrameLanes = ReturnType<typeof createFrameLanes>;