body {
    font-family: Arial, sans-serif;
    background-color:#fff;
  }
  .calculator-container {
    max-width: 400px;
    margin: 50px auto;
    padding: 50px;
    background-color:black;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  }
  .calculator-button {
    width: 50px;
    height: 50px;
    margin: 10px ;
    font-size: 18px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    color:black;
  }
  .calculator-display {
    height: 65px;
    font-size: 24px;
    text-align: right;
    padding: 5px 10px;
    margin-bottom: 15px;
    border: 1px solid #ced4da;
    border-radius: 5px;
    background-color: #fff;
  }