.popup {
  visibility: hidden;
  position: fixed;
  top: 70px; /* Adjust based on your navbar height */
  left: 50%;
  transform: translateX(-50%);
  background-color: #fff; /* theme blue */
  color: #0d6efd;
  border: 3px solid #0d6efd;
  
  padding: 10px 20px;
  border-radius: 8px;
  z-index: 9999;
  opacity: 0;
  transition: opacity 0.4s ease, top 0.3s ease;
  font-weight: 600;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.25);
}

.popup.show {
  visibility: visible;
  opacity: 1;
  top: 60px; /* slight slide animation upwards */
}