#wallet {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      margin: 20px 0;
    }

    .money {
      width: 80px;
      margin: 5px;
    }
    .billet{height: 60px; width:90px}

    input[type="number"] {
      padding: 8px;
      font-size: 18px;
      width: 100px;
    }

    button {
      padding: 10px 20px;
      font-size: 16px;
      margin: 10px;
      cursor: pointer;
    }

    #feedback {
      font-size: 18px;
      margin-top: 15px;
    }

    #score {
      font-weight: bold;
      margin-top: 10px;
    }

    @media (max-width: 600px) {
      .money {
        width: 60px;
      }

      input[type="number"] {
        font-size: 16px;
        width: 80px;
      }
    }