html.irid-stale::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  height: 8px;
  width: 100%;
  z-index: 99999;
  background: linear-gradient(90deg, transparent, var(--irid-stale-color, #0d6efd) 50%, transparent);
  animation: irid-progress 1.2s ease-in-out infinite;
}

@keyframes irid-progress {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}
