import { LitElement } from 'lit';
/**
 * Button Group — groups buttons together with shared borders and border-radius.
 * Use `ui-split-button` for a primary-action + dropdown combo.
 *
 * @slot - Default slot; place `ui-button`, `<button>`, or `<a>` elements inside.
 *
 * @csspart group - The container element
 */
export declare class UIButtonGroup extends LitElement {
    static styles: import("lit").CSSResult;
    /** Vertical layout */
    vertical: boolean;
    /** ARIA label */
    ariaLabel: string;
    render(): import("lit-html").TemplateResult<1>;
}
/**
 * Split Button — combines a primary action button with an attached dropdown trigger.
 *
 * @slot       - Primary button content
 * @slot menu  - Dropdown items (place `ui-menu` or list items here)
 *
 * @fires split-click    - Fired when the primary button is clicked
 * @fires split-open     - Fired when dropdown opens
 * @fires split-close    - Fired when dropdown closes
 *
 * @csspart primary  - The primary action button
 * @csspart toggle   - The dropdown arrow button
 * @csspart dropdown - The dropdown panel
 */
export declare class UISplitButton extends LitElement {
    static styles: import("lit").CSSResult;
    /** Button variant */
    variant: 'primary' | 'secondary' | 'danger';
    /** Disabled state */
    disabled: boolean;
    private _open;
    connectedCallback(): void;
    disconnectedCallback(): void;
    private _closeDropdown;
    private _handleKeydown;
    private _onPrimaryClick;
    private _onToggle;
    render(): import("lit-html").TemplateResult<1>;
}
declare global {
    interface HTMLElementTagNameMap {
        'ui-button-group': UIButtonGroup;
        'ui-split-button': UISplitButton;
    }
}
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