.masonry {
  column-count: 4;
  column-gap: 16px;
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: 16px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.masonry-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.masonry-item img {
  width: 100%;
  height: auto;
  display: block;
  transition: opacity 400ms ease;
}

.masonry-item img.lazy {
  opacity: 0;
}

.masonry-item img.lazy-loaded {
  opacity: 1;
}

.masonry-item-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0, 0, 0, 0.45));
  opacity: 0;
  transition: opacity var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 16px;
}

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

.masonry-item-card {
  position: relative;
}

.masonry-item-title {
  color: #fff;
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1.3;
}

.masonry-item-category {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.72rem;
  margin-top: 4px;
}

.progressive-placeholder {
  position: absolute;
  inset: 0;
  background: var(--color-border);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.7; }
}

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 20px;
  color: var(--color-text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.empty-state p {
  font-size: 1rem;
}

@media (max-width: 1200px) {
  .masonry {
    column-count: 3;
  }
}

@media (max-width: 900px) {
  .masonry {
    column-count: 2;
    column-gap: 12px;
  }
  .masonry-item {
    margin-bottom: 12px;
  }
}

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