/* ══════════════════════════════════════════════════════════════════
   Skeleton loader для <img> и <video>.
   Работает автоматически: JS ставит контейнерам класс .mzg-skel-wrap,
   пока медиа не загрузилось — виден шиммер.

   Дизайн: пиксель-грид на фоне мягкого движущегося градиента
   (в духе PixelCard, но без canvas — чисто CSS).
   ══════════════════════════════════════════════════════════════════ */

.mzg-skel-wrap {
  position: relative;
  overflow: hidden;
  background: #131313;
}
.mzg-skel-wrap::before {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(110deg,
      rgba(255,255,255,0)     20%,
      rgba(255,255,255,0.06)  40%,
      rgba(255,255,255,0.10)  50%,
      rgba(255,255,255,0.06)  60%,
      rgba(255,255,255,0)     80%
    ),
    linear-gradient(135deg, #171717 0%, #0f0f0f 100%);
  background-size: 200% 100%, 100% 100%;
  animation: mzg-skel-shimmer 1.8s linear infinite;
  z-index: 0;
}
.mzg-skel-wrap::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(0deg, rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 6px 6px, 6px 6px;
  mix-blend-mode: overlay;
  opacity: .8;
  z-index: 1;
  pointer-events: none;
}

/* Медиа поверх скелетона, невидимо пока не загружено */
.mzg-skel-wrap > img,
.mzg-skel-wrap > video {
  position: relative;
  z-index: 2;
  opacity: 0;
  transition: opacity .3s ease;
}
.mzg-skel-wrap.mzg-skel-done > img,
.mzg-skel-wrap.mzg-skel-done > video {
  opacity: 1;
}
.mzg-skel-wrap.mzg-skel-done::before,
.mzg-skel-wrap.mzg-skel-done::after {
  opacity: 0;
  transition: opacity .3s ease;
}

/* Error: показать иконку сломанного медиа вместо шиммера */
.mzg-skel-wrap.mzg-skel-fail::before {
  animation: none;
  background:
    linear-gradient(135deg, #1a1414 0%, #0f0a0a 100%);
}
.mzg-skel-wrap.mzg-skel-fail::after {
  content: "";
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23ffffff44' stroke-width='1.5'><rect x='3' y='4' width='18' height='16' rx='2'/><path d='M3 16l5-5 4 4 3-3 6 6'/><circle cx='9' cy='9' r='1.5' fill='%23ffffff44'/></svg>");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 32px;
  opacity: 1;
  mix-blend-mode: normal;
}

@keyframes mzg-skel-shimmer {
  0%   { background-position: -100% 0, 0 0; }
  100% { background-position:  100% 0, 0 0; }
}

@media (prefers-reduced-motion: reduce) {
  .mzg-skel-wrap::before { animation: none; }
}