import { LitElement } from "lit";
import type { ShwTone } from "../shw-tone";
import "./shw-markdown";
/**
 * Highlights a short Markdown message.
 *
 * @element shw-callout
 */
export declare class ShwCallout extends LitElement {
    #private;
    static properties: {
        heading: {
            type: StringConstructor;
        };
        tone: {
            type: StringConstructor;
            reflect: boolean;
        };
    };
    static styles: import("lit").CSSResult[];
    /** Optional callout heading. */
    heading: string;
    /** Visual meaning of the callout. */
    tone: ShwTone;
    protected render(): import("lit").TemplateResult<1>;
}
declare global {
    interface HTMLElementTagNameMap {
        "shw-callout": ShwCallout;
    }
}