#drop-area {
      border: 2px dashed #aaa;
      padding: 20px;
      width: 100%;
      margin: 20px auto;
      text-align: center;
      cursor: pointer; /* クリック可能に見せるために追加 */
    }
    #fileElem {
      display: none;
    }
    /*
    #fileSelectBtn {
      margin-top: 10px;
      padding: 10px 15px;
      background: #007BFF;
      color: white;
      border: none;
      cursor: pointer;
    }
*/
    .file-entry {
      margin: 10px auto;
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-family: sans-serif;
    }
    .delete-btn {
      background: #dc3545;
      color: white;
      border: none;
      padding: 5px 10px;
      cursor: pointer;
    }