.siatac-modal {
  display: none;
  position: fixed;
  z-index: 9999;
  inset: 0;

  background-color: rgba(0,0,0,0.35);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);

  opacity: 0;
  transition: opacity 0.4s ease;

  align-items: center;
  justify-content: center;
}

.siatac-modal.show {
  display: flex;
  opacity: 1;
}

.siatac-modal-content {
  background: #f9f9f9;
  padding: 30px 25px;
  border-radius: 25px;
  max-width: 90%;
  width: 600px;
  text-align: center;

  box-shadow: 8px 8px 20px rgba(0, 0, 0, 0.25),
              -8px -8px 20px rgba(255, 255, 255, 0.6);

  transform: scale(0.8);
  opacity: 0;
  transition: transform 0.4s ease, opacity 0.4s ease;
}

.siatac-modal.show .siatac-modal-content {
  transform: scale(1);
  opacity: 1;
}

#siatac-close {
  position: absolute;
  top: 15px;
  right: 15px;
  width: 28px;
  height: 28px;
  line-height: 28px;
  text-align: center;
  background: #f1f1f1;
  border-radius: 50%;
  border: 1px solid #ccc;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  color: #333;
  transition: all 0.2s ease;
}

#siatac-close:hover {
  background: #e60000;
  color: #fff;
  border-color: #e60000;
  transform: scale(1.1);
}

@media (max-width: 480px) {
  .siatac-modal-content {
    width: 95%;
    padding: 20px 15px;
    border-radius: 15px;
  }
  #siatac-close {
    font-size: 22px;
    top: 10px;
    right: 15px;
  }
}

body.modal-open {
  overflow: hidden;
}