html,body{height:100%;margin:0;padding:0;background:#000}body{width:100vw;height:100vh;overflow:hidden;display:flex;align-items:center;justify-content:center}#app{position:relative;width:100vw;height:100vh}img.fullscreen-image,video.fullscreen-image{position:absolute;top:0;left:0;width:100vw;height:100vh;object-fit:contain;display:block;background:#000;opacity:1;transition:opacity .3s ease-in-out}.fullscreen-image.fade-out{opacity:0}.fullscreen-image.fade-in{opacity:0;animation:fadeIn .3s ease-in-out forwards}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}