#loading-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: #e0f7fa; /* light sea blue */
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s;
}
.spin {
  animation: spin 0.6s linear infinite;
}
.zoomout {
  animation: zoomout 1.2s linear forwards;
}
.zoomout-slow {
  animation: zoomout 3s linear forwards;
}
.zoomout-fast {
  animation: zoomout 0.7s linear forwards;
}
.zoomout-spin {
  animation: zoomout-spin 0.7s linear forwards;
}
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}
@keyframes zoomout {
  0% { transform: scale(1); }
  80% { transform: scale(1.1); }
  100% { transform: scale(3); opacity: 0; }
}
@keyframes zoomout-spin {
  0% { transform: scale(1) rotate(0deg); opacity: 1; }
  80% { transform: scale(1.1) rotate(288deg); opacity: 1; }
  100% { transform: scale(3) rotate(720deg); opacity: 0; }
}