.scene-bg{background:linear-gradient(180deg,#000000,#0a1a2a);width:100%;height:100%;position:relative;overflow:hidden}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.scene-bg>div:last-child{animation:fadeIn .3s ease-out forwards}