Im stuck can someone tell me the mistake

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

   **Your code so far**
/* file: index.html */
<!DOCTYPE html>
<html>
 <head>
   <title>Registration Form</title>
	  <link rel="stylesheet" type="text/css" href="styles.css" />
 </head>
 <body>
   <h1>Registration Form</h1>
   <p>Please fill out this form with the required information</p>
   <form action='https://register-demo.freecodecamp.org'>
     <fieldset>
       <label>Enter Your First Name: <input type="text" name="first-name" required /></label>
       <label>Enter Your Last Name: <input type="text" name="last-name" required /></label>
       <label>Enter Your Email: <input type="email" name="email" required /></label>
       <label>Create a New Password: <input type="password" name="password" pattern="[a-z0-5]{8,}" required /></label>
     </fieldset>
     <fieldset>
       <label><input type="radio" name="account-type" class="inline" /> Personal Account</label>
       <label><input type="radio" name="account-type" class="inline" /> Business Account</label>
       <label>
         <input type="checkbox" name="terms" class="inline" required /> I accept the <a href="https://www.freecodecamp.org/news/terms-of-service/">terms and conditions</a>
			  </label>
     </fieldset>
     <fieldset>
       <label>Upload a profile picture: <input type="file" name="file" /></label>
       <label>Input your age (years): <input type="number" name="age" min="13" max="120" />
			  </label>
       <label>How did you hear about us?
         <select 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>Provide a bio:
         <textarea 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;
}

fieldset {
 border: none;
	padding: 2rem 0;
}

fieldset:not(:last-of-type) {
 border-bottom: 3px solid #3b3b4f;
}

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

input,
textarea,
select {
 margin: 10px 0 0 0;
	width: 100%;
 min-height: 2em;
}

input, textarea {
 background-color: #0a0a23;
 border: 1px solid #0a0a23;
 color: #ffffff;
}

.inline {
 width: unset;
 margin: 0 0.5em 0 0;
 vertical-align: middle;
}

input[type="submit"] {
 display: block;
 width: 60%;
 margin: 1em 1em;
 height: 2em;
 font-size: 1.1rem;
 background-color: #3b3b4f;
 border-color: white;
 min-width: 300px;

}

   **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 54

Link to the challenge:

Right now you’re giving the margin 1em to all sides, you only want to apply 1em to the top and bottom. How would you do that?

but isnt the first two values for top and bottom

margin: top right bottom left

With four values, every value represents a side, like I’ve written here.

margin: first-value second-value

But with only two value, the first-value represents top and bottom, while the second-value represents right-left.

Example: margin: 16px 32px will set a 16px top, 16px bottom, 32 px left and 32px right.

ah right! thank you so much

It is still polite and an important skill to practice actually describing what you need help with…