.calculator{
	width: fit-content;
	box-sizing: border-box;
	font-family: verdana;
    border-radius:10px;
    background: rgba(255,107,107,0.5);
}
.calculator .form-control{
	height: 60px;
}
.calculator .form-group{
	margin-bottom: 0;
}
.calculator input[type=text]{
	font-size: 1.5rem;
	color:#333;
}
.calculator .btn {
	font-size: 1.5rem;
	color:#333;
	width: 58px;
}
.calculator .btn-op {
	background-color: #337ab7;
    color:white;
}