.transaction-card {
      margin-bottom: 15px;
      border-left: 5px solid;
    }
    .credit {
      border-color: #28a745;
    }
    .debit {
      border-color: #dc3545;
    }
    .invest {
      border-color: orange;
    }
    .transaction-amount {
      font-size: 1.25rem;
      font-weight: 700;
    }
    .transaction-type {
      font-size: 0.85rem;
      text-transform: uppercase;
      font-weight: bold;
    }