<form method="post" action="/sms-opt-in">
  <label>Full Name</label>
  <input type="text" name="full_name" required>

  <label>Mobile Phone Number</label>
  <input type="tel" name="phone" placeholder="(555) 555-5555" required>

  <label>Email Address (optional)</label>
  <input type="email" name="email">

  <label style="margin-top:15px;">
    <input type="checkbox" name="sms_consent" required>
    By checking this box, I agree to receive text messages from Classic Cruise Rentals related to bookings, tour reminders, customer support, and occasional promotional messages. Message frequency varies. Message & data rates may apply. Reply STOP to opt out, HELP for help. Consent is not a condition of purchase.
  </label>

  <p style="font-size:12px;">
    <a href="/terms-of-service">Terms of Service</a> |
    <a href="/privacy-policy">Privacy Policy</a>
  </p>

  <button type="submit">Sign Up for Text Updates</button>
</form>