<!DOCTYPE html> <html lang="ja"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width" /> <title>Tailwind CSS Demo</title> <link rel="stylesheet" href="./style.css" /> </head> <body class="bg-black text-white max-w-5xl mx-auto my-16"> <h1 class="my-16 text-8xl font-bold">こんにちは</h1> <p class="m-2 text-4xl">こんにちは、ようこそ</p> </body> </html>