<form>
  <h1>Welcome, who are you?</h1>
  <label for="name">name:&nbsp;</label><input type="text" id="name">
</form>

form {
  background-color: pink;
  text-align: center;
  width: min(600px, 90vw);
  margin: auto;
  padding: 10px;
}

h1 {
    font-size: max(1rem, 10vh);
}