<form action="">
  <fieldset disabled>
   <label for="email">email</label>
  <input name="email" id="email" type="email">
    <label for="age">age</label>
  <input name="age" id="age" type="number">
  <button>Submit</button>
    </fieldset>
</form>

fieldset {
 display: contents;
}

form {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-width: 400px;
  background-color: black;
  color: white;
  padding: 24px;
  border-radius: 8px;
  margin-inline: auto;
  margin-top: 40px;
}

button {
  background-color: green;
  color: white;
  border: 0;
  padding: 8px;
  border-radius: 4px;
  margin-top: 16px;
}

body {
  font-family: system-ui;
}