.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid #fff;
  border-top: 2px solid transparent;
  border-radius: 50%;
  display: inline-block;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}
#newsletter-message {
  color: #fff !important;
  font-size: 14px;
}
#newsletter-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}