import { PropertyValues } from 'lit';
import { BaseButton, BpTypeButton } from '@blueprintui/components/internals';
/**
 * Accordion Header
 *
 * @element bp-accordion-header
 * @since 1.0.0
 * @slot - slot for header content
 * @cssprop --background
 * @cssprop --color
 * @cssprop --font-size
 * @cssprop --padding
 */
export declare class BpAccordionHeader extends BaseButton implements Pick<BpTypeButton, keyof BpAccordionHeader> {
    /** @private */
    accessor expanded: boolean;
    static styles: CSSStyleSheet[];
    render(): import("lit").TemplateResult<1>;
    connectedCallback(): void;
    updated(props: PropertyValues<this>): void;
}