body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: #f0f8ed;
    font-family: Arial, sans-serif;
  }
  
  .calculator {
    background: #222;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 0px 10px #00000088;
  }
  
  #display {
    width: 290px;
    height: 50px;
    font-size: 24px;
    text-align: right;
    padding: 10px;
    border: none;
    border-radius: 5px;
    margin-bottom: 15px;
    background-color: #e0d6d6;
  }
  
  .buttons {
    display: grid;
    grid-template-columns: repeat(4, 70px);
    gap: 10px;
  }
  
  button {
    height: 60px;
    font-size: 20px;
    border: none;
    border-radius: 5px;
    background: #444;
    color: rgb(221, 213, 213);
    cursor: pointer;
    box-shadow: 0px 0px 5px rgb(255, 255, 255);
    transition: background 0.2s;

  }
  
  button:hover {
    background: #666;
  }
  button:active {
    background-color: #444;
    opacity: 0s;
  }
  
  button.equals {
    grid-row: span 2;
    background: #f39c12;
  }
  button.dot {
    grid-row: span;
    margin-left: 80px;
    margin-right: -80px;

  }
  
  button.equals:hover {
    background: #e67e22;
  }
  
  button.zero {
    grid-column: span 2;
    width: 230px;
    
  }
.class{
  height: 60px;
  font-size: 20px;
  border: none;
  border-radius: 5px;
  background: #444;
  color: rgb(221, 213, 213);
  cursor: pointer;
  transition: background 0.2s;
}
.class:hover {
  background: #666;
}
.class:active {
  background-color: #444;
  opacity: 0s;
}