.modal-container {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  display: none;
  opacity: 0;
}

.modal-container.open { display: block; }

.modal-inner {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 1;
}

.modal-bg {
  position: absolute;
  left: 0;
  top: 0;
  background-color: #000;
  opacity: 0.7;
  width: 100%;
  height: 100%;
}