Hi everyone!
I am new at coding, it is my first time doing a survey form, so I would like to ask you for some feedback to improve my code and my skills. Thank you! 
HTML
<!DOCTYPE html>
<html lang="eng">
<head>
<meta charset="UTF-8">
<title>Survey Form</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<h1 id="title">FreeCodeCamp Survey Form</h1>
<p id="description">Thank you for taking the time to help us improve the platform</p>
<div class="form">
<form id="survey-form">
<fieldset>
<label id="name-label">Name
<input id="name" name="name" type="text" placeholder="Enter your name" required></input>
</label>
<label id="email-label">Email
<input id="email" name="email" type="email" placeholder="Enter you email" required></input>
</label>
<label id="number-label"> Age (optional)<input id="number" name="number" type="number" min="13" max="100" placeholder="Age">
</label></fieldset>
<fieldset><label for="dropdown">Which option best describes your current role?
<select id="dropdown" name="dropdown">
<option value="">(Select your current role)</option>
<option value="1">Student</option>
<option value="2">Full time job</option>
<option value="3">Full time learner</option>
<option value="4">Prefer not to say</option>
<option value="5">Other</option>
</select></label></fieldset>
<fieldset>
<p> Would you recommend freeCodeCamp to a friend?</p>
<label for="Definitely"><input id="Definitely" type="radio" name="recommend" value="definitely" class="inline" checked> Definitely</label>
<label for="Maybe"> <input id="Maybe" type="radio" name="recommend" value="Maybe" class="inline" checked> Maybe </label>
<label for="Not sure"> <input id="Not sure" type="radio" name="recommend" value="Not sure" class="inline" checked> Not sure </label>
</fieldset>
<fieldset>
<label>What is your favorite feature of freeCodeCamp?
<select id="feature" name="feature">
<option value="">(Select one)</option>
<option value="1">Challenges</option>
<option value="2">Projects</option>
<option value="3">Community</option>
<option value="4">Open Source</option>
</select></label>
</fieldset>
<fieldset>
<p>What would you like to see improved? (Check all that apply)</p>
<label for="Front-end Projects"> <input id="Front-end Projects" type="checkbox" name="improvements" value="Front-end Projects" class="inline" checked> Front-end Projects
<label for="Front-end Projects"> <input id="Front-end Projects" type="checkbox" name="improvements" value="Front-end Projects" class="inline"> Front-end Projects </label>
<label for="Back-end Projcts"> <input id="Back-end Projects" type="checkbox" name="improvements" value="Back-end Projects" class="inline"> Back-end Projects </label>
<label for="Data Visualizations"> <input id="Data Visualizations" type="checkbox" name="improvements" value="Data Visualization" class="inline"> Data Visualization </label>
<label for="Challenges"> <input id="Challenges" type="checkbox" name="improvements" value="Challenges" class="inline"> Challenges </label>
<label for="Open Source Community"> <input id="Open Source Community" type="checkbox" name="improvements" value="Open Source Community" class="inline"> Open Source Community </label>
<label for="Gitter help rooms"> <input id="Gitter help rooms" type="checkbox" name="improvements" value="Gitter help rooms" class="inline"> Gitter help rooms </label>
<label for="Videos"> <input id="Videos" type="checkbox" name="improvements" value="Videos" class="inline"> Videos </label>
<label for="City Meetups"> <input id="City Meetups" type="checkbox" name="improvements" value="City Meetups" class="inline"> City Meetups </label>
<label for="Wiki"> <input id="Wiki" type="checkbox" name="improvements" value="Wiki" class="inline"> Wiki </label>
<label for="Forum"> <input id="Forum" type="checkbox" name="improvements" value="Forum" class="inline"> Forum </label>
<label for="Additional Courses"> <input id="Additional Courses" type="checkbox" name="improvements" value="Additional Courses" class="inline"> Additional Courses </label>
</label></fieldset>
<fieldset>
<label for="Comments">Any comment?
<textarea id="comments" name="comments" rows="5" cols="50" placeholder="Enter your comment here..."></textarea>
</label>
</fieldset>
<input id="submit" type="submit" value="Submit">
</form>
</div>
</body>
</html>
CSS
body{
background-image: url(https://t3n.de/news/wp-content/uploads/2018/06/shutterstock-1107121655.jpg);
width:100%;
height: 100vh;
margin: 0;
color: #f3f3f3;
font-family: poppins, sans-serif;
font-size:18px;
padding: 30px;
background-size: cover;
}
h1, p {
margin: 1em auto;
text-align: center;
}
form{
width: 50vw;
max-width: 400px;
min-width: 100px;
margin: 1em auto;
padding-bottom: 3em;
}
fieldset {
border: none;
padding: 0.5rem 0;
}
label {
display: block;
margin: 1rem 0;
}
input, select, textarea {
margin: 5px 0 0 0;
width: 100%;
min-height: 2em;
}
input, textarea {
background-color: white;
border: 1px solid white;
color: #ffff;
}
input[type="radio"] {
width: unset;
height: 1em;
margin: 0 0.5 0 0;
display: inline-block;
vertical-align: middle;
}
input[type="checkbox"] {
width: unset;
height: 1em;
margin: 0 0.5em 0 0;
display: inline-block;
vertical-align: middle;
}
input[type="Submit"] {
display: block;
width: 60%;
margin: 1em auto;
height: 2em;
font-size: 1.1rem;
background-color: red;
border-color: red;
min-width: 300px;
}
.form{
background-color: black;
width: 50%;
margin-left: auto;
margin-right: auto;
padding: 20px;
max-width: 500px;
min-width: 100px;
}
.inline {
width: unset;
margin: 0 0 0 0;
vertical-align: middle;
}