.drop-zone {
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.drop-zone.drag-over {
  border-color: #3b82f6;
  background-color: #eff6ff;
}

.btn-blue {
  background-color: #2563eb;
}
.btn-blue:hover {
  background-color: #1d4ed8;
}

.btn-amber {
  background-color: #f59e0b;
}
.btn-amber:hover {
  background-color: #d97706;
}