import Document, { DocumentContext } from 'next/document'; import { ServerStyles, createStylesServer } from '@mantine/next'; const stylesServer = createStylesServer(); export default class _Document extends Document { static async getInitialProps(ctx: DocumentContext) { const initialProps = await Document.getInitialProps(ctx); // Add your app specific logic here return { ...initialProps, styles: ( <> {initialProps.styles} ), }; } }