body {
	background-color: #0606aa;
}
.top_button {
	height: 100vh;
	display: flex;
	justify-content: center;
	align-items: center;
	flex-direction: column;
}
.top_button a:hover img {
 	opacity: 0.7;
 	filter: alpha(opacity=70);
  	-moz-opacity: 0.7;
  	-webkit-transition: 0.3s ease-in-out;
 	-moz-transition: 0.3s ease-in-out;
  	-o-transition: 0.3s ease-in-out;
  	transition: 0.3s ease-in-out;
}
.top_button h1 {
	color: #ffffff;
}