/* Spinner circular */
.circular-spinner {
  border: 4px solid #eee;
  border-top: 4px solid #3498db;
  border-radius: 50%;
  width: 28px;
  height: 28px;
  animation: circular-spin 0.8s linear infinite;
  margin: 10px auto;
  will-change: transform; /* ✅ optimización */
}

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