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

html,
body {
  width: 100%;
  height: 100%;
  background: #05060f;
  overflow: hidden;
  font-family: 'SF Pro Display', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}

#stage {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  background:
    radial-gradient(120% 90% at 50% 0%, #0b1030 0%, #05060f 60%, #03040a 100%);
}

#game {
  display: block;
  box-shadow: 0 0 60px rgba(80, 100, 255, 0.25), 0 0 160px rgba(255, 45, 120, 0.12);
  border: 1px solid rgba(120, 140, 255, 0.22);
  border-radius: 6px;
}