I need help with step 13 please!

HTML-CSS
#1

Tell us what’s happening:
It tells me to use a selector list to center the h1, h2, and p elements. I’ve tried adding it within the style element, and it says I should only have one selector in my style element. I have also tried adding it after the style element but it says that I should have a single type selector for each element.

  **Your code so far**

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8" />
  <title>Cafe Menu</title>
  <style>
    h1 {
      text-align: center;
    }
    h2 {
      text-align: center;
    }
    p {
      text-align: center;
    }
    h1, h2, p {
      text-align: center;
    }
  </style>
  
</head>
<body>
  <header>
    <h1>CAMPER CAFE</h1>
    <p>Est. 2020</p>
  </header>
  <main>
    <section>
      <h2>Coffee</h2>
    </section>
  </main>
</body>
<html>

  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36

Challenge: Step 14

Link to the challenge:

#2

Please Check This
https://forum.freecodecamp.org/t/i-need-help-with-step-13-please/516602/2?u=atdilshan0127

#3