* {
	margin: 0;
	padding: 0;
}
html {
	height: 100%;
}
article, aside, details, figcaption, figure, footer, header, hgroup, main, nav, section, summary {
	display: block;
}
body {
	font: 12px/18px Arial, sans-serif;
	width: 100%;
	height: 100%;
	background: #e0daf4 url(../images/background_5k.jpg) no-repeat;
	background-size:cover;
}
img { /* для IE8+ */
	position: absolute;  /* подробнее про position: absolute; */
	top: 0;
	left: 0;
	bottom: 0;
	right: 0;
	margin: auto;
	max-width: 100%;
	max-height: 100%;
	border: none;
}
@media only screen and (-Webkit-min-device-pixel-ratio: 1.5),
only screen and (-moz-min-device-pixel-ratio: 1.5),
only screen and (-o-min-device-pixel-ratio: 3/2),
only screen and (min-device-pixel-ratio: 1.5),
only screen and (min--moz-device-pixel-ratio: 1.5), 
only screen and (min-resolution: 1.5dppx){
	#sprite_user {
  	background-image: url(../images/background.jpg);
  }