main {
width: 940px;
margin: 0 auto;
}
form{
margin: 40px 0;
}
form label {
display: block;
font-size: 20px;
margin: 0 0 10px;
}
form input {
display: block;
margin: 0 0 20px;
padding: 10px 25px;
}
html
<main>
<form>
<label for="namesurname">Name </label>
<input type="text"id="namesurname">
<label for="email">Email</label>
<input type="text" id="email">
<label for="phone">Phone Number</label>
<input type="text" id="phone">
<input type="submit" value="Send">
</form>
</main>