I’m weak in the frontend, so I don’t understand what I’m doing wrong, I think I’m creating a div, a span and an a to it, adding a div to the notification container and they are layered on top of each other, help me please.
css:

.notification-block {
    position: fixed;
    bottom: 20px;
    left: 20px;
    width: 300px;
    background-color: #007bff;
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 10px; /* Add margin between notifications */
}
.notification-block a {
    color: white;
    text-decoration: none;
    flex-grow: 1;
}
.notification-block .close-btn {
    color: white;
    font-size: 1.2em;
    cursor: pointer;
}

    socketNotif.onmessage = function(event) {
        const data = JSON.parse(event.data);
        console.log('Notification received:', data);
        showNotification(data)
    };
    function showNotification(message) {
      const notificationContainer = document.getElementById('notificationContainer');
      const notificationElement = document.createElement('div');
      notificationElement.className = 'notification-block';
      
      const aLink = document.createElement('a');
      aLink.setAttribute('href', `/chat/${message.chat_id}`);
      aLink.textContent = message.message;

      const spanMessage = document.createElement('span');
      spanMessage.className = 'close-btn';
      spanMessage.innerHTML = '×';

      spanMessage.addEventListener('click', function() {
          notificationContainer.removeChild(notificationElement);
      });

      notificationElement.appendChild(aLink);
      notificationElement.appendChild(spanMessage);
      notificationContainer.appendChild(notificationElement);
  }

  document.getElementById('notificationLink').addEventListener('click', function(event) {
      event.preventDefault();
      window.location.href = "/chat";  // Adjust the URL as needed
  });

problem.png

I tried to do a lot of things, but I can’t explain how and why, since I’m weak at the front, so I’m slowly figuring it out. Thank you very much!