.loader {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 1;
  width: 120px;
  height: 120px;
  margin: -76px 0 0 -76px;
  border: 16px solid #f3f3f3;
  border-radius: 50%;
  border-top: 16px solid #3498db;
  border: 16px solid #f3f3f3; /* Light grey */
  border-top: 16px solid #fab432; /* ODB Yellow */
  border-radius: 50%;
  animation: spin 0.4s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}