body{
    background-color: rgba(222, 134, 134, 0.2);
    width:100%;
}
.calculator{
    position:absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 20px;
    border-radius: 20px;
    box-shadow: 0px 8px 20px rgba(0, 0, 0, 0.2);
    background-color: #f9f9f9;
}
#display{
    height: 50px;
    margin-bottom: 15px;
    font-size: 1.5rem;
    text-align: right;
    padding: 10px;
    border: 2px solid #ccc;
    border-radius: 10px;
    width:250px;
    color: black;
    border: solid;
    border-width: 1px;
  }
  .buttons {
    display: grid;
    grid-template-columns: repeat(4,60px);
    grid-template-rows: repeat(5, 40px); 
    gap: 10px;
  }
  button{
    cursor: pointer;
    color: black;
    border: solid;
    border-width: 1px;
  }
  .equal{
    grid-column: span  3;
  }
  @media (max-width: 600px) {
    .calculator{
      padding: 30px;
      width: 70%;
  }
  #display{
      width:94%;
      height:100px;
      margin-bottom: 30px;
      font-size: 3rem;
    }
    .buttons {
      padding:3px;
      grid-template-columns: repeat(4,1fr);
      width:100%;
        }
    button{
      font-size: 1.5rem;
      box-sizing: border-box; 
    }
  }