.spinner {
  box-sizing: border-box;
  width: 80px;
  height: 80px;
  border-radius: 100%;
  border: 10px solid rgba(103, 103, 103, 0.2);
  border-top-color: #232323;
  animation: spin 1s infinite linear;
}
@keyframes spin {
  100% {
    transform: rotate(360deg);
  }
}