body{
	font-size: 20px;
background-color: #fff;
background-image: url(bg.jpg);
}

h1{
	color: white;
	text-align: center;
}

.calculator{
	/*border: 2px solid black;*/
	padding-left: 50px;
	padding: 10px;
	margin: auto;
	width: 50%;
	background-color: #c7c8d7;
	border-radius: 20px;
}


#demo{
	color: black;
	font-size: 22px;
}


input[type=button] {
  background-color: #3c839b;
  border: none;
  color: white;
  padding: 16px 32px;
  text-decoration: none;
  margin: 12px 2px 4px 2px;
  cursor: pointer;
}

input[type=button]:hover {
  background-color: darkblue;
  color: white;
  font-size: 22px;
}