* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0b0f1a;
  color: #e5e7eb;
  font-family: monospace;
}

canvas {
  display: block;
  margin: 0 auto;
  background: #111827;
  border: 2px solid #1f2937;
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}