Learn Basic CSS by Building a Cafe Menu - Step 21

Tell us what’s happening:
Describe your issue in detail here.
i don’t know how to create a new type selector in the style sheet that will give the div element the width of 300px please help me out…
Your code so far

<!-- file: index.html -->
<!DOCTYPE html>
<html lang="en">
  <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"/>
  </head>
  <body>
    <div>
      <main>
        <h1>CAMPER CAFE</h1>
        <p>Est. 2020</p>
        <section>
          <h2>Coffee</h2>
        </section>
      </main>
    </div>
  </body>
</html>
/* file: styles.css */
body {
  background-color: burlywood;
}

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

Your browser information:

User Agent is: Mozilla/5.0 (X11; CrOS aarch64 14469.59.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.94 Safari/537.36

Challenge: Learn Basic CSS by Building a Cafe Menu - Step 21

Link to the challenge:

Welcome to our community!
The ‘div’ element is a selector in this case:

element {
  property: value;
}

‘width’ is a property, and the ‘value’ is given in pixels.