html {
                    min-height: 100% !important;
                    background-image: url("https://www.bing.com/th?id=OHR.DanteDay_IT-IT4553177654_1920x1080.jpg&rf=LaDigue_1920x1080.jpg&pid=hp") !important;
                    background-size: cover !important;
                    background-repeat: no-repeat !important;
                    background-position: center center !important;
                    -webkit - background - size: cover !important;
                    -moz-background-size: cover !important;
                    -o-background-size: cover !important;
                    background-size: cover !important;
                }
                body {
                    background-color:transparent !important;
                    border: none !important;
                }
                #wall-descr:before { 
                    content: "Cattedrale Santa Maria del Fiore, Firenze, Toscana (© Lindrik/iStock/Getty Images Plus)" !important;
                }