html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #05060f;
  overscroll-behavior: none;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  font-family: "Trebuchet MS", "Segoe UI", system-ui, sans-serif;
}

#stage {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 50% 8%, #1b2350 0%, #0a0c1e 55%, #05060f 100%);
}

canvas#game {
  display: block;
  touch-action: none;
  outline: none;
  border-radius: 0;
  box-shadow: 0 0 60px rgba(80, 220, 200, 0.10);
  background: #0a0e24;
}