#loader {
  position: fixed;
  inset: 0;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  z-index: 9999;
  transition: opacity 0.3s ease;
}

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