html.presentation-bg,html.presentation-bg body,html.presentation-bg .app{background:#fff!important}html.presentation-bg,html.presentation-bg body{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}html.presentation-bg img,html.presentation-bg video{-webkit-user-drag:none;-khtml-user-drag:none;-moz-user-drag:none;-o-user-drag:none;user-drag:none;pointer-events:auto}@media print{html.presentation-bg,html.presentation-bg body{visibility:hidden!important;background:#fff!important}html.presentation-bg body:before{content:"Printing of this presentation is disabled.";visibility:visible;text-align:center;color:#555;font-family:system-ui,sans-serif;font-size:14px;display:block;position:fixed;top:40%;left:0;right:0}}