body.login {
	background-image: url('https://picsum.photos/2000/1550/?image=1044');
	background-position: center center;
	background-repeat: no-repeat;
	background-size: cover;
   background-color: rgba(0, 0, 0, .2);
}
@media screen and (min-width: 640px){
	body.login {
		background-image: url('https://picsum.photos/960/960/?image=1044');
		
	}
}	
@media screen and (min-width: 960px){
	body.login {
		background-image: url('https://picsum.photos/1200/1200/?image=1044');
	}
}	
@media screen and (min-width: 1200px){
	body.login {
		background-image: url('https://picsum.photos/1600/1250/?image=1044');
	}
}	
@media screen and (min-width: 1600px){
	body.login {
		background-image: url('https://picsum.photos/2000/1550/?image=1044');
	}
}