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

body {
  width: 100%;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #1a1a1a;
  font-family: Arial, sans-serif;
  overflow: hidden;
}

canvas {
  border: 2px solid #333;
  background: #f5f5f5;
  display: block;
  max-width: 100%;
  max-height: 100%;
  image-rendering: pixelated;
  touch-action: none;
}