body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #111;
  color: white;
  font-family: monospace;
}

canvas {
  background: #1d2b53;
  border-radius: 12px;
}