.portfolio-grid.skeleton-mode {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}
.portfolio-skeleton {
  background: #f8f8f8;
  border-radius: 6px;
  padding: 12px;
  animation: pulse 1.6s infinite ease-in-out;
  box-shadow: 0 0 3px rgba(0,0,0,0.05);
}
.portfolio-skeleton .thumb {
  width: 100%;
  height: 180px;
  background: #e0e0e0;
  border-radius: 4px;
  margin-bottom: 12px;
}
.portfolio-skeleton .title {
  width: 60%;
  height: 16px;
  background: #d2d2d2;
  border-radius: 4px;
}

@keyframes pulse {
  0% { opacity: 1; }
  50% { opacity: 0.4; }
  100% { opacity: 1; }
}