import { LitElement } from 'lit';
/**
 * Tab Group allows multiple panels to be contained within a single window,
 * using tabs as a navigational element.
 *
 * @status ready
 * @category navigation
 * @slot - The element which contains the content to be revealed.
 * @slot tab - The element which contains all tabs to reveal tabbed content.
 *
 * @cssprop [--n-tab-group-padding=0] - Controls the padding around the tab group (including the tab list), using our [spacing tokens](/tokens/#space).
 */
export default class TabGroup extends LitElement {
    static styles: import("lit").CSSResult[];
    private direction;
    private observer?;
    private static observerOptions;
    /**
     * Unique ID for each tab group component present.
     */
    private tabGroupId;
    /**
     * Adds an accessible label to the tab list container.
     */
    label: string;
    /**
     * Controls the padding of the tab group component.
     */
    padding?: 'm' | 'l' | 'none';
    /**
     * Whether the tab list sticks to the top of the tab group as you scroll.
     */
    sticky: boolean;
    /**
     * The current tab node selected in the tab group.
     */
    private selectedTab;
    render(): import("lit").TemplateResult<1>;
    connectedCallback(): void;
    firstUpdated(): void;
    private updateSlots;
    disconnectedCallback(): void;
    private setupObserver;
    /**
     * If the selected tab is selected programmatically update all the tabs.
     */
    private handleMutation;
    /**
     * Get the selected tab button, or the first tab button.
     */
    private get initialSelectedTab();
    /**
     * Apply accessible attributes and values to the tab buttons.
     */
    private setupTabs;
    /**
     * Apply accessible attributes and values to the tab panels.
     */
    private setupPanels;
    private handleTabChange;
    /**
     * Get the previous tab button in the tab group
     */
    private previousTab;
    /**
     * Handle keyboard accessible controls.
     */
    private handleKeydown;
    /**
     * Update the selected tab button with attributes and values.
     * Update the tab group state.
     */
    private updateSelectedTab;
}
declare global {
    interface HTMLElementTagNameMap {
        'nord-tab-group': TabGroup;
    }
}