/** Minimal identity and availability used by card selection. */
export interface GridIdentity {
    id: string;
    disabled?: boolean | undefined;
}
/** Supported modes for selectable and ordinary card lists. */
export type GridSelectionMode = 'none' | 'single' | 'multiple';
/** Normalize invalid track counts to the documented default. */
export declare function gridColumns(value: number): number;
/** Resolve one enabled tab stop after collection changes. */
export declare function gridActive(items: readonly GridIdentity[], focused: string | null, selected: readonly string[]): string | undefined;
/** Remove stale duplicate keys and enforce selection cardinality. */
export declare function gridSelection(items: readonly GridIdentity[], keys: readonly string[], mode: GridSelectionMode): string[];
/** Toggle one enabled item without retaining stale selections. */
export declare function gridSelect(items: readonly GridIdentity[], keys: readonly string[], mode: GridSelectionMode, id: string): string[];
/** Measure actual rendered tracks before each vertical keyboard movement. */
export declare function gridRenderedColumns(nodes: readonly HTMLElement[], fallback: number): number;
/** Find the next enabled card without changing selection. */
export declare function gridDestination(items: readonly GridIdentity[], index: number, key: string, columns: number, rtl: boolean): number | undefined;