.site-lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: clamp(1rem, 4vw, 2rem);
  background: rgba(8, 10, 18, 0.92);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 260ms ease, visibility 260ms ease;
}

.site-lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.site-lightbox__stage {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: min(92vw, 1200px);
  max-height: 78vh;
  transition: transform 420ms cubic-bezier(0.22, 1, 0.36, 1), opacity 320ms ease;
  will-change: transform, opacity;
}

.site-lightbox__stage.is-zooming {
  transition: transform 380ms cubic-bezier(0.22, 1, 0.36, 1), opacity 280ms ease;
}

.site-lightbox__img {
  max-width: 100%;
  max-height: 78vh;
  border-radius: 12px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
}

.site-lightbox__caption {
  margin: 0.85rem 0 0;
  max-width: min(92vw, 720px);
  text-align: center;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(0.9rem, 2vw, 1rem);
  line-height: 1.5;
}

.site-lightbox__btn {
  position: absolute;
  border: 0;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 1.5rem;
  line-height: 1;
  display: grid;
  place-items: center;
  transition: background 180ms ease, transform 180ms ease;
}

.site-lightbox__btn:hover {
  background: rgba(255, 255, 255, 0.22);
  transform: scale(1.04);
}

.site-lightbox__close { top: 1rem; right: 1rem; }
.site-lightbox__prev { left: 1rem; top: 50%; transform: translateY(-50%); }
.site-lightbox__next { right: 1rem; top: 50%; transform: translateY(-50%); }

[data-lightbox] { cursor: zoom-in; }

@media (prefers-reduced-motion: reduce) {
  .site-lightbox,
  .site-lightbox__stage,
  .site-lightbox__btn {
    transition: none;
  }
}