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

body {
  overflow: hidden;
  background: #000;
}

canvas {
  display: block;
}

#speedometer {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font: bold 18px monospace;
  padding: 10px 16px;
  border: 1px solid #555;
  z-index: 10;
  pointer-events: none;
}