Tailwindcss not working with next.js; what is wrong with the configuration?

For some reason, tailwind is not rendering properly in next.js.

I'm wondering if something is wrong with my settings?

Styles folder - tailwind.css

@tailwind base;

/* Write your own custom base styles here */

/* Start purging... */
@tailwind components;
/* Stop purging. */

/* Write you own custom component styles here */
.btn-blue {
  @apply bg-blue-500 text-white font-bold py-2 px-4 rounded;
}

/* Start purging... */
@tailwind utilities;
/* Stop purging. */

/* Your own custom utilities */

....

_app.js

import React from "react";
// import "styles/global.scss";


import 'styles/tailwind.css'


import NavbarCustom from "components/Layout/NavbarCustom";
import Footer from "components/Layout/Footer";
import "util/analytics.js";
import { ProvideAuth } from "util/auth.js";

function MyApp({ Component, pageProps }) {
  return (
    <ProvideAuth>
      <>
        <NavbarCustom
          bg="white"
          variant="light"
          expand="md"
          logo="icons/Logo_512px.png"
        />

        <Component {...pageProps} />

What am I doing wrong? so confused, usually this sort of setup is fine.

This is the site btw - https://moodmap.app/ .

using the information below, made changes and still same issue weirdly.

https://moodmap.app/ is the site example.

tailwind.config.js

module.exports = {
  future: {
    removeDeprecatedGapUtilities: true,
  },
  purge: ['./components/**/*.{js,ts,jsx,tsx}', './pages/**/*.{js,ts,jsx,tsx}'],
  theme: {
    extend: {
      colors: {
        'accent-1': '#333',
      },
    },
  },
  variants: {},
  plugins: [],
}

postcss.config.js

module.exports = {
    plugins: [
      'tailwindcss',
      'postcss-flexbugs-fixes',
      [
        'postcss-preset-env',
        {
          autoprefixer: {
            flexbox: 'no-2009',
          },
          stage: 3,
          features: {
            'custom-properties': false,
          },
        },
      ],
    ],
  }

{
  "name": "MoodMap",
  "version": "0.1.0",
  "private": true,
  "keywords": [
    "MoodMap"
  ],
  "dependencies": {
    "@analytics/google-analytics": "0.2.2",
    "@stripe/stripe-js": "^1.5.0",
    "analytics": "0.3.1",
    "fake-auth": "0.1.7",
    "mailchimp-api-v3": "1.13.1",
    "next": "9.5.3",
    "query-string": "6.9.0",
    "raw-body": "^2.4.1",
    "rc-year-calendar": "^1.0.2",
    "react": "16.12.0",
    "react-dom": "16.12.0",
    "react-hook-form": "4.10.1",
    "react-query": "2.12.1",
    "react-transition-group": "^4.4.1",
    "stripe": "^8.52.0"
  },
  "scripts": {
    "dev": "next dev",
    "build": "next build",
    "start": "next start",
    "stripe-webhook": "stripe listen --forward-to localhost:3000/api/stripe-webhook"
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  },
  "devDependencies": {
    "postcss-flexbugs-fixes": "^4.2.1",
    "postcss-preset-env": "^6.7.0",
    "stylelint": "^13.7.1",
    "stylelint-config-standard": "^20.0.0",
    "tailwindcss": "^1.8.9"
  }
}

Thanks!

I think your setup is too big. You can achieve this with much simpler stuff nowdays.

First, I don't think CSS needs to be loaded into nextjs anymore and modules are supported natively. (So you can delete this withCSS stuff)

Second, tailwind doesn't need such elaborate setup anymore, if you are using the newer versions.

So you will need to install postcss-preset-env, but it does remove the need for big config now.

Check out this example https://github.com/vercel/next.js/tree/canary/examples/with-tailwindcss