.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.8);
  gap: 1rem;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  display: none;
  transition: opacity 0.3s, visibility 0.3s;
}
.loading-spinner {
  width: 50px;
  height: 50px;
  border: 5px solid #fff;
  border-top: 5px solid #D50000;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}