body {
  background-color: #F9F8F6; 
  font-family: Arial, sans-serif;
}

.calculator-col {
  background-color: #FCF8F8;   
  border: 4px solid #F9DFDF;   
  border-radius: 15px;
  padding: 30px;
}


button {
  background-color: #EFE9E3;
  border: 2px solidEFE9E3#999;
  padding: 10px 20px;
}

#prod {
  background-color: #273F4F; 
  color: #ffffff;            
  font-weight: bold;
  padding: 10px 20px;
  border-radius: 5px;
  display: inline-block;
  margin-top: 15px;
}