html,body{margin:0;height:100%;overflow:hidden;background:#000}
#fpsWorld{position:fixed;inset:0;background:radial-gradient(circle,#14294a,#000);color:white;perspective:1200px}
#crosshair{position:absolute;left:50%;top:50%;font-size:35px;color:#0ff}
#hud{position:absolute;top:20px;left:20px}
.shop3d-product{position:absolute;padding:20px;border:2px solid #0ff;background:#ffffff22;transition:.5s}
.shop3d-product.target{transform:scale(1.4);box-shadow:0 0 80px #f0f}