#drop-zone {
    width: 100%;
    height: 200px;
    border: 2px dashed #0078d4;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #555;
  }
  #drop-zone.hover {
    border-color: #005bb5;
    background-color: #f0f8ff;
  }