18F/web-design-standards

<div class="usa-sign-up">
  <h3 class="usa-sign-up__heading">Sign up</h3>
  <form class="usa-form">
    <label class="usa-label" for="email" id="">Your email address</label>
    <input class="usa-input" id="email" name="email" type="email" />
    <button class="usa-button" type="submit">Sign up</button>
  </form>
</div>