HTML 및 CSS를 사용한 구독 양식

<main>
   <div class="subscribe-card">
   <h2>Stay up to date!</h2>
   <p>Subscribe to our weekly newsletter for <br />
      the latest news and tips.
   </p>
    <form class="form-email">
    <input type="email" aria-label="Email to subscribe" placeholder="email@example.com" class="input-email" required>          <p role="alert" class="error-message">*Please enter a valid email address!</p>
    <button type="submit" class="send-button">
     Subscribe now
    </button>
    </form>
  </div>
</main>