html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #04070c;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  user-select: none;
  overscroll-behavior: none;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: none;
  font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}

#stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 50% 45%, #0b1524 0%, #04070c 70%);
}

#game {
  display: block;
  touch-action: none;
  cursor: pointer;
  box-shadow: 0 0 80px rgba(30, 120, 190, 0.18);
  border-radius: 4px;
}