html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #05070d;
  color: #e8f7ff;
  font-family: Consolas, Monaco, 'Courier New', monospace;
  touch-action: none;
  user-select: none;
}
canvas {
  display: block;
  width: 100vw;
  height: 100vh;
  outline: none;
  cursor: crosshair;
  image-rendering: auto;
  background: #05070d;
}
* { box-sizing: border-box; }