JSFiddle - React, Tailwind, and code Playground

HTML

<head>

  <head>
    <title>Сергей - оф. сайт</title>
    <style type="text/css">
      html,
      body {
        height: 100%;
      }

      body {
        font-family: sans-serif;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-direction: column;
      }

      h1,
      h2 {
        text-align: center;
        color: #b31d1d;
      }

    </style>
  </head>

<body>
  <h1>Сергей</h1>
  <h2>Техник 2 кат.</h2>

  </h2>
</body>

</html>