/* ── Lightbox overlay ────────────────────────────────────────────────────── */

#lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
}

#lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lb-img {
  max-width: min(90vw, 1200px);
  max-height: 90vh;
  object-fit: contain;
  user-select: none;
  cursor: default;
  display: block;
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */

.lb-close,
.lb-prev,
.lb-next {
  position: absolute;
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
  line-height: 1;
  opacity: 0.75;
  padding: 0.5rem;
  transition: opacity 0.15s;
}

.lb-close:hover,
.lb-prev:hover,
.lb-next:hover {
  opacity: 1;
}

.lb-close {
  top: 1rem;
  right: 1rem;
  font-size: 1.75rem;
}

.lb-prev,
.lb-next {
  top: 50%;
  transform: translateY(-50%);
  font-size: 3.5rem;
}

.lb-prev { left: 0.75rem; }
.lb-next { right: 0.75rem; }

/* ── Counter ─────────────────────────────────────────────────────────────── */

.lb-counter {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.875rem;
  pointer-events: none;
  white-space: nowrap;
}

/* ── Skeleton placeholder ────────────────────────────────────────────────── */

.lb-skeleton {
  display: none;
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.lb-skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.06) 50%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: lb-shimmer 1.4s ease-in-out infinite;
}

#lightbox.lb-loading .lb-skeleton {
  display: block;
}

#lightbox.lb-loading .lb-img {
  display: none;
}

@keyframes lb-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Clickable gallery images ────────────────────────────────────────────── */

.lb-trigger {
  cursor: pointer;
}