document.addEventListener("DOMContentLoaded", function () {
      const messageElement = document.getElementById('content');
      let messageVisible = false;
      const card = document.querySelector('.card');

      card.addEventListener('click', function () {
        if (!messageVisible) {
          messageElement.style.display = 'block';
          messageVisible = true;
        } else {
          messageElement.style.display = 'none';
          messageVisible = false;
        }
        setTimeout(function () {
          document.getElementById('content').classList.add('show');
        }, 3000);
      });
    });