.calculator {
    max-width: 500px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
  }
  
  h1 {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 20px;
  }
  
  label {
    display: block;
    margin-bottom: 10px;
  }
  
  input {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 20px;
    align-items: center;
  }
  
  button {
    padding: 10px;
    border-radius: 5px;
    border: none;
    background-color: #4CAF50;
    color: white;
    font-weight: bold;
    cursor: pointer;
    margin-bottom: 20px;
  }
  
  button:hover {
    background-color: #3E8E41;
  }
  
  #results {
    display: none;
    margin-top: 20px;
  }
  
  #results p {
    font-weight: bold;
    margin-bottom: 10px;
  }