body {
      margin: 0;
      padding: 0;
    }

    h1 {
      text-align: center;
      font-weight: bold;
      font-size: 2.5rem;
      color: white;
      font-family: 'Times New Roman', Times, serif;
      margin-bottom: 30px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    form {
      background-color: rgba(0, 0, 0, 0.7);
      border-radius: 30px;
      padding: 30px;
      color: white;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.8);
    }

    .form-label {
      color: #ffffff;
      font-weight: 500;
    }

    .form-control::placeholder {
      text-align: center;
    }

    .btn-success {
      width: 100%;
      border-radius: 30px;
      padding: 10px;
      font-weight: bold;
    }

    .btn-success:hover {
      background-color: #218838;
      color: white;
    }

    .select2-container--default .select2-selection--multiple {
      background-color: #fff;
      border: 1px solid #ced4da;
      border-radius: 0.375rem;
      min-height: 38px;
    }

    @media (max-width: 768px) {
      h1 {
        font-size: 1.8rem;
      }

      form {
        padding: 20px;
      }
    }

    .nested-dropdown {
      display: none;
    }

    .nested-dropdown select {
      margin-top: 10px;
    }