Tell us what’s happening:
Hola a todos, no se porque razón el código del “border-bottom” no me pasa. He tratado de todas formas, buscando el google y en las respuestas del foro, pero en lo tengo igual que el de otros usuarios que han compartido el mismo (paso 47). Espero alguien pueda ayudarme ya que llevo un par de dias estancado en este paso. Gracias 
Your code so far
<!-- 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>
<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>
<legend>Account type (required)</legend>
<label for="personal-account"><input id="personal-account" type="radio" name="account-type" checked /> Personal</label>
<label for="business-account"><input id="business-account" type="radio" name="account-type" /> Business</label>
</fieldset>
<fieldset>
<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>
<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>
<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 */
fieldset {
border-bottom: 3px solid #3b3b4f;
border: none;
padding: 2rem 0;
}
/* User Editable Region */
label {
display: block;
margin: 0.5rem 0;
}
Your browser information:
El agente de usuario es: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36
Challenge Information:
Aprende formularios HTML construyendo un formulario de registro - Paso 47