.drop-active {
  border-color: #3b82f6 !important;
  background-color: #eff6ff !important;
}
.image-card {
  transition: box-shadow 0.2s;
}
.image-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.picking-color {
  cursor: crosshair;
  outline: 3px solid #7c3aed;
}