.glider{position:absolute;box-shadow:0 0 6px #fff9;border-radius:50px;background:#fff}.planet{position:absolute;top:400px;left:200px;width:50px;height:50px;border-radius:50px;opacity:0;transform:scale(.6);transition:opacity .3s ease-out,transform .3s ease-out}.planet-shadow{filter:drop-shadow(0 0 4px rgba(255,255,255,.35))}