html,body{background:#0f1020;width:100%;height:100%;margin:0;padding:0;font-family:Arial,Helvetica,sans-serif;overflow:hidden}#app{justify-content:center;align-items:center;width:100vw;height:100vh;display:flex}canvas{border:2px solid #3f4266;border-radius:16px;box-shadow:0 0 30px #0009}