/* Gallery grid + lightbox viewer. */

.gallery-page {
  padding: 80px 0 100px;
}

.gallery-empty {
  text-align: center;
}

.gallery-grid {
  column-count: 3;
  column-gap: 16px;
  margin-top: 40px;
}

.gallery-item {
  display: block;
  width: 100%;
  margin: 0 0 16px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  break-inside: avoid;
  cursor: zoom-in;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.gallery-item:hover,
.gallery-item:focus-visible {
  transform: translateY(-4px);
  border-color: var(--accent-glow);
  box-shadow: 0 12px 28px rgba(0, 59, 153, 0.35);
}

.gallery-item img {
  width: 100%;
  display: block;
}

@media (max-width: 900px) {
  .gallery-grid {
    column-count: 2;
  }
}

@media (max-width: 560px) {
  .gallery-grid {
    column-count: 1;
  }
}

/* ---------- lightbox ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(2, 4, 8, 0.94);
  opacity: 0;
  visibility: hidden;
  transition: opacity 250ms ease;
}

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

.lightbox-image {
  max-width: 90vw;
  max-height: 88vh;
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  transform: scale(0.96);
  opacity: 0;
  transition: transform 250ms ease, opacity 250ms ease;
}

.lightbox.is-open .lightbox-image {
  transform: scale(1);
  opacity: 1;
}

.lightbox-close,
.lightbox-nav {
  position: absolute;
  background: rgba(16, 21, 29, 0.7);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.lightbox-close:hover,
.lightbox-nav:hover {
  border-color: var(--accent-glow);
  color: var(--accent-glow);
}

.lightbox-close {
  top: 24px;
  right: 24px;
}

.lightbox-nav {
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-prev {
  left: 24px;
}

.lightbox-next {
  right: 24px;
}

@media (max-width: 640px) {
  .lightbox-close {
    top: 12px;
    right: 12px;
  }

  .lightbox-prev {
    left: 8px;
  }

  .lightbox-next {
    right: 8px;
  }

  .lightbox-nav {
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }
}