.polaris-container-mask {
  position: absolute;
  z-index: 99;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(217, 217, 217, 0.7);
  display: none;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  font-size: 18px;
  color: rgba(0, 0, 0, 0.85);
}
.polaris-container-mask.visible {
  display: flex;
}