tailwind 설치yarn add tailwindcss postcss autoprefixernpx tailwindcss init -p tailwind.config.js 변경/** @type {import('tailwindcss').Config} */export default { content: [ "./index.html", "./src/**/*.{js,ts,jsx,tsx}", ], theme: { extend: {}, }, plugins: [],} index.css 변경// src/index.css@tailwind base;@tailwind components;@tailwind utilities;