body {
	display: block;
	position: relative;
	margin: auto;
	font-family: 'arial', sans serif;
	width: 500px;
}

.wrapper {
	display: block;
	position: relative;
	margin: 0 auto;
	width: 500px;
}

select {
	display: block;
	background-color: #e3e3e3;
	color: black;
	font-size: 18px;
	font-weight: 200;
	border-radius: 10px;
	padding: 3px 30px;
	background-position: center;
}

.btn-result {
	display: block;
	margin: auto;
	margin-top: 20px;
	background-color: green;
	color: white;
	font-weight: bold;
	font-size: 30px;
	padding: 10px 50px;
	border: none;
}