.bntn1 {
    box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
	border:0px;
	-webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
	padding: 10px 24px;
	font-size:16px;
}

.bntn1:hover {
    box-shadow: 0 12px 16px 0 rgba(0,0,0,0.24), 0 17px 50px 0 rgba(0,0,0,0.19);
	 background-color: black;
    color: white;
}