body {
  margin: 0;
  padding: 0;
  background: #000;
  font-family: Helvetica, Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

#canvas-container {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 0 25px rgba(0, 255, 119, 0.35);
}