.spinner {
  width: 50px;
  height: 50px;
  border: 5px solid #b8b8b8;
  border-top-color: #0078d7;
  border-radius: 50%;
  animation: spinner 1s linear infinite;
}

@keyframes spinner {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}