JSFiddle - React, Tailwind, and code Playground

HTML

<head>
  <link rel="stylesheet" type="text/css" href="style.css">
</head>

<body>
<div class="header">
  <ul class="menu">
      <li>
        <a href="index.html">Главная</a>
      </li>
      <li>
        <a href="catalog.html">Каталог</a>
      </li>
      <li>
        <a href="contacts.html">Контакты</a>
      </li>
    </ul>
</div>
    <hr>
    <center>
      <h1>Оценка Вещей</h1>
      <h2>Приветствую гость!</h2>
    </center>
    <hr>
</body>

CSS

.menu li a {
    color: darkgreen;
    text-decoration: none;
    font-family: "Times New Roman", sans-serif, Verdana;
    font-style: normal;
    font-weight: bolder;
}

.menu li {
    list-style-type: none;
}