.image-skeleton,
.video-skeleton,
.canvas-skeleton,
.model-skeleton {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(110deg, rgba(255, 255, 255, 0.04) 8%, rgba(255, 255, 255, 0.12) 18%, rgba(255, 255, 255, 0.04) 33%),
    linear-gradient(180deg, rgba(18, 18, 20, 0.92), rgba(34, 35, 40, 0.88));
  background-size: 220% 100%, 100% 100%;
  border-radius: 14px;
  isolation: isolate;
}

.image-skeleton::after,
.video-skeleton::after,
.canvas-skeleton::after,
.model-skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.14), transparent);
  transform: translateX(-100%);
  animation: performance-skeleton-shimmer 1.5s ease-in-out infinite;
  pointer-events: none;
}

.image-skeleton {
  aspect-ratio: 4 / 3;
}

.video-skeleton {
  aspect-ratio: 16 / 9;
}

.canvas-skeleton,
.model-skeleton {
  aspect-ratio: 1 / 1;
}

.fade-upgrade {
  transition: opacity 220ms ease, filter 220ms ease, transform 220ms ease;
  will-change: opacity, filter, transform;
}

.fade-upgrade.is-upgrading {
  opacity: 0.92;
  filter: saturate(0.96) contrast(0.98);
}

.media-preview-blocked {
  position: relative;
}

.media-preview-blocked::before {
  content: "Preview paused";
  position: absolute;
  left: 0.75rem;
  bottom: 0.75rem;
  z-index: 2;
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  background: rgba(10, 10, 12, 0.72);
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  pointer-events: none;
}

@keyframes performance-skeleton-shimmer {
  100% {
    transform: translateX(100%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .image-skeleton::after,
  .video-skeleton::after,
  .canvas-skeleton::after,
  .model-skeleton::after {
    animation: none;
    opacity: 0.32;
    transform: none;
  }

  .fade-upgrade {
    transition: none;
  }
}