import { LitElement } from 'lit';
import { TABLE_CELL_ALIGN } from './defs';
/**
 * `kyn-th-group` Web Component.
 * Represents a stacked/grouped header that spans multiple columns.
 * Uses `display: contents` so it is invisible to the CSS table layout,
 * allowing its child `kyn-th` elements to participate directly as table-cells.
 * The group label is passed to children, which render it above their content.
 *
 * @slot unnamed - Slot for child `kyn-th` elements that belong to this group.
 */
export declare class TableHeaderGroup extends LitElement {
    static styles: import("lit").CSSResult;
    /** The label/title displayed in the stacked (parent) header row. */
    accessor label: string;
    /**
     * Specifies the alignment of the group header label.
     * Options: 'left', 'center', 'right'
     */
    accessor align: TABLE_CELL_ALIGN;
    /**
     * Marks slotted kyn-th children with stacked-child attributes
     * and passes group label and position information.
     * @internal
     */
    private _handleSlotChange;
    updated(changedProps: any): void;
    render(): import("lit-html").TemplateResult<1>;
}
declare global {
    interface HTMLElementTagNameMap {
        'kyn-th-group': TableHeaderGroup;
    }
}
//# sourceMappingURL=table-header-group.d.ts.map