main{
  text-align: center;
  padding:20%;
}
.btn{
	line-height: 1.25;
  text-decoration:none;
	font-weight:bold;
	background:#8dc21f;
	color:#fff !important;
	border-radius:.5em;
	padding:1em 4em;
	text-align: center;
	position: relative;
  transition:.3s;
}

.btn:after{
	content:"";
	position:absolute;
	top:0;
	bottom:.1em;
	right:5%;
	margin:auto;
	width: .3em;
	height: .3em;
	border-top: .05em solid #fff;
	border-right: .05em solid #fff;
	transform: rotate(45deg);
	transition:.3s;
}
a:hover{
	opacity:.75;
}