import { PropsWithChildren } from 'react';
export declare function Head({ children }: PropsWithChildren<{}>): null;
interface SEOProps {
    title: string;
    description: string;
    keywords: string;
    image?: string;
    url?: string;
}
export declare function SEO({ title, description, keywords, url, image }: SEOProps): JSX.Element;
interface ViewportProps {
    width: number | 'device-width';
    height?: number | 'device-height';
    initialScale?: number;
    minimumScale?: number;
    maximumScale?: number;
    userScalable?: boolean;
    targetDensitydpi?: number | 'device-dpi' | 'low-dpi' | 'medium-dpi' | 'high-dpi';
}
export declare function Viewport(props: ViewportProps): JSX.Element;
export {};