#spinner {
  position: fixed;
  left: 50%;
  top: 50%;
  z-index: 999;
  transform: translate(-50%, -50%);
  width: 68px;
  height: 68px;
  border-radius: 50%;
  border-top: 3px solid #FFF;
  border-right: 3px solid transparent;
  box-sizing: border-box;
  animation: rotation 1s linear infinite;
}

@keyframes rotation {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
/* Shown, but not yet revealed: blocks clicks without flickering on fast page loads. */
#content-overlay.dNDT-spinner-pending,
#spinner.dNDT-spinner-pending {
  opacity: 0 !important;
  cursor: progress;
}

/* While loading, cover the fixed header, menus and dialogs; the sidebar overlay keeps its own layer. */
#content-overlay.dNDT-spinner-active {
  z-index: 10200;
}
#spinner.dNDT-spinner-active {
  z-index: 10201;
}