#adminmenu .toplevel_page_amazon-web-services {
    div.wp-menu-image {
        background: url("../img/icon16.png") no-repeat 7px 5px;
    }
    
    &.wp-has-current-submenu, &.current, &:hover {
        div.wp-menu-image {
            background-position: 7px -79px;
        }
    }
    
    img {
        display: none;
    }

	@media only screen and (-webkit-min-device-pixel-ratio: 2),
	    only screen and (-moz-min-device-pixel-ratio: 2),
	    only screen and (-o-min-device-pixel-ratio: 2/1),
	    only screen and (min-device-pixel-ratio: 2) {

	    div.wp-menu-image {
	        background-image: url("../img/icon16@2x.png");
	        background-size: 16px 100px;
	    }
	}
}

#icon-amazon-web-services {
    background: url(../img/icon32.png) no-repeat;

    @media only screen and (-webkit-min-device-pixel-ratio: 2),
        only screen and (-moz-min-device-pixel-ratio: 2),
        only screen and (-o-min-device-pixel-ratio: 2/1),
        only screen and (min-device-pixel-ratio: 2) {

        background: url(../img/icon32@2x.png) no-repeat;
        background-size: 32px 32px;
    }
}