Hello Everyone, I'm stuck. How should i go about this? Please Help

Tell us what’s happening:
Describe your issue in detail here.

  **Your code so far**
/* file: index.html */
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Cafe Menu</title>
  <link href="styles.css" rel="stylesheet" type="text/css" />
</head>
<body>
  <div .menu{}>
    <header>
      <h1>CAMPER CAFE</h1>
      <p>Est. 2020</p>
    </header>
    <main>
      <section>
        <h2>Coffee</h2>
      </section>
    </main>
  </div>
</body>
<html>
/* file: styles.css */
body {
/*
background-color: burlywood;
*/
}

h1, h2, p {
text-align: center;
}

.menu {
width: 80%;
background-color: burlywood;
margin-left: auto;
margin-right: auto;
}
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 6.1; rv:101.0) Gecko/20100101 Firefox/101.0

Challenge: Step 28

Link to the challenge: