body {
    font-family: "Poppins", sans-serif; 
    background-color: #202020;
    justify-content: center;
    align-items: center;
    display: flex;
  }
  
  .calculator {
    margin: 50px auto;
    width: 250px;
    border: 1px solid #333;
    padding: 10px;
    border-radius: 10px;
    background-color: #222;
    box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.15);
    position: absolute;
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
  }
  
  .display {
    text-align: right;
    margin-bottom: 10px;
  }
  
  .button-row {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    margin-bottom: 10px;
  }
  
  .button {
    width: 50px;
    height: 50px;
    font-size: 24px;
    border-radius: 5px;
    background-color: #333;
    border: 1px solid #444;
    cursor: pointer;
    color: #fff;
    font-family: "Poppins", sans-serif; 
  }
  
  .button:hover {
    background-color: #444;
  }
  
  #result {
    width: 100%;
    height: 70px;
    font-size: 36px;
    text-align: right;
    border-radius: 5px;
    border: none;
    background-color: #333;
    color: #fff;
    font-family: "Poppins", sans-serif; 
  }
  
  .calculator p {
    position: absolute;
    top: 132%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
  }