Learn HTML Forms by Building a Registration Form - Step 45

I have tried all I could but nothing is working .
Created class type to remove border from each fieldset but the code didnt pass

<!-- file: index.html -->
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>Registration Form</title>
    <link rel="stylesheet" href="styles.css" />
  </head>
  <body>
    <h1>Registration Form</h1>
    <p>Please fill out this form with the required information</p>
    <form method="post" action='https://register-demo.freecodecamp.org'>
      <fieldset class="set1">
        <label for="first-name">Enter Your First Name: <input id="first-name" name="first-name" type="text" required /></label>
        <label for="last-name">Enter Your Last Name: <input id="last-name" name="last-name" type="text" required /></label>
        <label for="email">Enter Your Email: <input id="email" name="email" type="email" required /></label>
        <label for="new-password">Create a New Password: <input id="new-password" name="new-password" type="password" pattern="[a-z0-5]{8,}" required /></label>
      </fieldset>
      <fieldset class="set2">
        <label for="personal-account"><input id="personal-account" type="radio" name="account-type" /> Personal Account</label>
        <label for="business-account"><input id="business-account" type="radio" name="account-type" /> Business Account</label>
        <label for="terms-and-conditions">
          <input id="terms-and-conditions" type="checkbox" required name="terms-and-conditions" /> I accept the <a href="https://www.freecodecamp.org/news/terms-of-service/">terms and conditions</a>
        </label>
      </fieldset>
      <fieldset class="set3">
        <label for="profile-picture">Upload a profile picture: <input id="profile-picture" type="file" name="file" /></label>
        <label for="age">Input your age (years): <input id="age" type="number" name="age" min="13" max="120" /></label>
        <label for="referrer">How did you hear about us?
          <select id="referrer" name="referrer">
            <option value="">(select one)</option>
            <option value="1">freeCodeCamp News</option>
            <option value="2">freeCodeCamp YouTube Channel</option>
            <option value="3">freeCodeCamp Forum</option>
            <option value="4">Other</option>
          </select>
        </label>
        <label for="bio">Provide a bio:
          <textarea id="bio" name="bio" rows="3" cols="30" placeholder="I like coding on the beach..."></textarea>
        </label>
      </fieldset>
      <input type="submit" value="Submit" />
    </form>
  </body>
</html>
/* file: styles.css */
body {
  width: 100%;
  height: 100vh;
  margin: 0;
  background-color: #1b1b32;
  color: #f5f6f7;
  font-family: Tahoma;
  font-size: 16px;
}

h1, p {
  margin: 1em auto;
  text-align: center;
}

form {
  width: 60vw;
  max-width: 500px;
  min-width: 300px;
  margin: 0 auto;
}


/* User Editable Region */

.set1{
  border:0;
  padding : 2rem 0rem 2rem 0rem;
}
.set2{
  border:0;
  padding: 2rem 0rem 2rem 0rem;
}
.set3{
  border:0;
  padding:2rem 0rem 2rem 0rem;
}

/* User Editable Region */


label {
  display: block;
  margin: 0.5rem 0;
}

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Challenge: Learn HTML Forms by Building a Registration Form - Step 45

Link to the challenge:

Im confused on where or how you came up with all this code? There is no direction to add the classes set1 set2 or set3 in your html so im not sure how you came up with that

The directions asked

Remove the border , and add 2rem of padding only to the top and bottom of each fieldset . Be sure to remove the padding from the left and right.

You should not be adding any new css. You need to make the changes the directions tell you to the fieldset