*{
	box-sizing:border-box;
}
body{
	background:#272727; 
  	-webkit-background-size: 50%;
  	-moz-background-size: 50%;
  	-o-background-size: 50%;
  	background-size: 50%;
}
.logo{
	width:25%;
	margin: 15% auto;
}
@media  (max-width:414px){
	body{
		background:#272727; 
		-webkit-background-size: cover;
		-moz-background-size: cover;
		-o-background-size: cover;
		background-size: cover;
	}
	.logo{
		width:50%;
		margin: 50% auto;
	}
}