JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<head>
        <meta charset="utf-8">
        <title>...</title>
        <style>
                p {
                    margin: 0;
                    border: red 1px solid;
                }
                
                h1 {margin: 0}
        </style>
</head>
<body>
        <div>
            <h1>h1</h1>
            <p>text</p>
        </div>
</body>
</html>