.win7-only{display:none}body.win7-mode .win7-only{display:block}body.win7-mode .normal-only{display:none}body.win7-mode{background:teal}body.win7-mode .win7-shell{max-width:1000px;margin:2rem auto}body.win7-mode .window{margin-bottom:1.5rem}body.win7-mode .title-bar-text{font-weight:600}body.win7-mode .window-body{padding:1rem}body.win7-mode{background:url('/assets/img/win7-wallpaper.jpg') center/cover no-repeat fixed}