#ctl-loader {
  position: fixed;
  z-index: 999999;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  background-color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
}
#ctl-loader .spinner {
  width: 100px;
  height: 100px;
  background-image: url("logo.png");
  background-size: contain;
  background-repeat: no-repeat;
  animation: spin 2s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}