a-scene{z-index:3}.vr360-app-main__online-stream__bottom,.vr360-app-main__online-stream__header{z-index:4}.back{position:fixed;top:20px;left:40px;z-index:9999;color:#fff}a-scene.fullscreen{position:fixed;top:0;left:0}a-scene.fullscreen .back{width:100%!important;height:100%!important;top:0!important;left:0!important;right:0!important;bottom:0!important;position:fixed!important}