body{margin:0;background:linear-gradient(135deg,#0f0c29,#302b63,#24243e);display:flex;justify-content:center;align-items:center;height:100vh;overflow:hidden}canvas{border:3px solid rgba(167,139,250,.3);border-radius:16px;box-shadow:0 0 60px rgba(167,139,250,.2)}