import { LitElement } from 'lit';
/**
 * Framed panel surface for grouped controls, documents, and sidebar content.
 *
 * @slot - Panel content.
 * @slot header - Optional panel heading or controls.
 * @slot footer - Optional panel footer.
 * @csspart chrome - The outer panel frame.
 * @csspart header - The header slot wrapper.
 * @csspart content - The content wrapper.
 * @csspart footer - The footer slot wrapper.
 */
export declare class W1cPanel extends LitElement {
    variant: 'raised' | 'sunken' | 'flat';
    private hasHeader;
    private hasFooter;
    render(): import("lit").TemplateResult<1>;
    private handleHeaderSlotChange;
    private handleFooterSlotChange;
    private hasAssignedContent;
    static styles: import("lit").CSSResult;
}
declare global {
    interface HTMLElementTagNameMap {
        'w1c-panel': W1cPanel;
    }
}