import { LitElement } from 'lit';
export type ThemeAppearance = 'light' | 'dark' | 'system';
export type ThemeMotion = 'full' | 'reduced' | 'system';
export declare class WebUiTheme extends LitElement {
    static styles: import('lit').CSSResult;
    get appearance(): ThemeAppearance | undefined;
    set appearance(v: string | undefined);
    private _appearance?;
    get motion(): ThemeMotion;
    set motion(v: string);
    private _motion;
    private _warned;
    connectedCallback(): void;
    protected updated(): void;
    getOverlayRoot(): HTMLElement | undefined;
    isReducedMotion(): boolean;
    render(): import('lit').TemplateResult<1>;
    firstUpdated(): void;
    private _hasAppearance;
    private _warnWhenAppearanceIsMissing;
}
declare global {
    interface HTMLElementTagNameMap {
        'web-ui-theme': WebUiTheme;
    }
}