html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: #142038 radial-gradient(circle at 50% 30%, #1e3054 0%, #142038 70%);
  font-family: "Segoe UI", "Trebuchet MS", sans-serif;
}

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

#game {
  width: min(100vw, calc(100vh * (16 / 9)));
  height: min(100vh, calc(100vw * (9 / 16)));
  border-radius: 10px;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.55);
  background: #000;
  touch-action: none;
}