.calculator {
    width: 300px;
    margin: 0 auto;
    text-align: center;
    background-color: #fea8e3;
    border-radius: 10px;
    padding: 20px;
  }
  
  #result {
    width: 100%;
    margin-bottom: 10px;
    background-color: #aaeffa;
    border: none;
    padding: 10px;
    font-size: 24px;
    border-radius: 5px;
  }
  
  .buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 10px;
  }
  
  button {
    padding: 15px;
    font-size: 20px;
    background-color: #9f00ff;
    border: none;
    color: #fff;
    border-radius: 5px;
  }
  
  button:hover {
    background-color: #f840c7;
  }