body {
  background: #f8f9fa;
}

.card {
  border-radius: 15px;
}

/* Drag & Drop Zone */
.drop-zone {
  border: 2px dashed #0d6efd;
  border-radius: 10px;
  padding: 30px;
  background: #fdfdff;
  transition: background 0.3s, border-color 0.3s;
  cursor: pointer;
}

.drop-zone.dragover {
  background: #e9f3ff;
  border-color: #0b5ed7;
}

#output a {
  margin-top: 10px;
  display: inline-block;
}