html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: #05070d;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Segoe UI", system-ui, sans-serif;
}

#game {
  display: block;
  background: #05070d;
  box-shadow: 0 0 60px rgba(80, 120, 255, 0.18);
  border-radius: 4px;
}