.portfolio-section {
  margin: 64px 0;
}

.portfolio-section-title {
  margin: 0 0 28px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 1.5rem;
  color: var(--color-accent);
}

.collage {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.collage-item {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  /* width and height set by JS at runtime */
}

.collage-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.collage-item:hover img {
  transform: scale(1.05);
}

.collage-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  text-align: center;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.collage-overlay span {
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.04em;
  line-height: 1.4;
}

.collage-item:hover .collage-overlay {
  opacity: 1;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
}

.lightbox.open {
  display: flex;
}

.lightbox-stage {
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.lightbox-image {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  display: block;
  border-radius: 4px;
}

.lightbox-caption {
  display: flex;
  align-items: center;
  gap: 16px;
  color: #fff;
  font-size: 0.95rem;
}

.lightbox-title {
  font-weight: 600;
}

.lightbox-counter {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.85rem;
}

.lightbox-close,
.lightbox-arrow {
  position: absolute;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}

.lightbox-close:hover,
.lightbox-arrow:hover {
  background: rgba(255, 255, 255, 0.2);
}

.lightbox-close {
  top: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  font-size: 1.6rem;
  line-height: 1;
}

.lightbox-arrow {
  top: 50%;
  transform: translateY(-50%);
  width: 56px;
  height: 56px;
  font-size: 2rem;
  line-height: 1;
}

.lightbox-prev { left: 24px; }
.lightbox-next { right: 24px; }

/* Responsive */
@media (max-width: 900px) {
  .lightbox-arrow {
    width: 44px;
    height: 44px;
    font-size: 1.5rem;
  }
  .lightbox-prev { left: 12px; }
  .lightbox-next { right: 12px; }
  .lightbox-close { top: 12px; right: 12px; }
}