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

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #04050c;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 42%, #0b1030 0%, #05060f 62%, #020309 100%);
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
}

#stage {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

canvas#game {
  display: block;
  touch-action: none;
  box-shadow: 0 0 80px rgba(70, 130, 255, 0.18);
}