* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 20px 0;
  background: linear-gradient(180deg, #000011 0%, #000033 50%, #000022 100%);
  min-height: 100vh;
  overflow-x: hidden;
  font-family: 'Courier New', monospace;
  touch-action: none;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}

canvas {
  cursor: none;
  touch-action: none;
}

@media (max-width: 820px) {
  body {
    padding: 10px 0;
  }
  
  canvas {
    max-width: 100%;
    height: auto;
  }
}