.w3-btnfin{
    border: solid 2px white;
    width: 40%;
    margin: 10% 30%;
    font-size: 1.6vw;
    padding: 2%;
	text-align:center;
	text-decoration: none;
}
@media only screen and (max-width: 768px) {
	.w3-btnfin{ font-size: 3vw;
	width: 70%;
	margin-left:15%;
}