/* Container for all catalog tiles */
.catalog-tile-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  grid-auto-rows: masonry;   /* experimental masonry rows */
  gap: 1rem;                 /* spacing between tiles */
  justify-content: center;   /* center grid in wide containers */
  padding: 10px;
}

/* Each individual tile */
.catalog-tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  cursor: pointer;
  break-inside: avoid; /* prevent tiles from splitting in masonry */
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.catalog-tile:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

/* Tile thumbnail image */
.catalog-tile img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* Tile info (id, name, grade) */
.catalog-info {
  padding: 10px;
  text-align: center;
  font-size: 1.1rem;
  font-weight: 500;
  color: #222;
}

/* Popup overlay for fullscreen images */
.catalog-popup {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.catalog-popup-content img {
  max-width: 90%;
  max-height: 90%;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.catalog-popup .caption {
  margin-top: 12px;
  color: #fff;
  text-align: center;
  font-size: 1.3rem;
}