body {
    background-color: #f0f0f0;
    font-family: Arial, sans-serif;
  }
  .container {
    margin-top: 30px;
  }
  .file-input-wrapper {
    text-align: center;
  }
  #fileInput {
    display: none;
  }
  .custom-file-upload {
    border: 2px solid #4caf50;
    display: inline-block;
    padding: 10px 20px;
    cursor: pointer;
    background-color: #4caf50;
    color: #fff;
    border-radius: 25px;
    transition: background-color 0.3s ease-in-out;
  }
  .custom-file-upload:hover {
    background-color: #388e3c;
  }
  .file-list {
    margin-top: 20px;
  }
  .file-item {
    background-color: #fff;
    border: 1px solid #ddd;
    padding: 10px;
    border-radius: 10px;
    margin-bottom: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  }
  .file-name {
    font-weight: bold;
    color: #4caf50;
  }
  .btn-zip {
    background-color: #4caf50;
    border-color: #4caf50;
    border-radius: 25px;
    transition: background-color 0.3s ease-in-out, border-color 0.3s ease-in-out;
  }
  .btn-zip:hover {
    background-color: #388e3c;
    border-color: #388e3c;
  }
  .btn-clear {
    background-color: #f44336;
    border-color: #f44336;
    border-radius: 25px;
    transition: background-color 0.3s ease-in-out, border-color 0.3s ease-in-out;
  }
  .btn-clear:hover {
    background-color: #d32f2f;
    border-color: #d32f2f;
  }
  .loading-container {
    margin-top: 20px;
    text-align: center;
  }
  .loading-spinner {
    margin-top: 10px;
  }