actuel-inactuel/site/snippets/footer.php

    <footer id="main-footer">
      <ul id="links">
        <li 
          id="subscribe-btn-wrapper"
        >
          <button id="subscribe-btn" class="plus">
            s'inscrire
          </button>
          <form id="subscribe-form" class="hidden">
            <label for="email">
              <input type="email" name="email" id="email" placeholder="votre e-mail">
              <button type="submit" onclick="subscribe(event)">→</button>
            </label>
          </form>
        </li>
        <li>
          <a href="<?= $site->find('a-propos')->url() ?>">
            à propos
          </a>
        </li>
      </ul>
    </footer>
  </body>
</html>