.loader-backdrop {
  position: fixed;
  inset: 0;
  background: #fff; /* match your site's background */
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.4s ease;
}

.loader-backdrop.hidden {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 5px solid #eee;
  border-top: 5px solid var(--primary-color); /* your brand color */
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}