html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #05070f;
}

body {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(120% 90% at 50% 10%, #131c34 0%, #080c18 55%, #04060d 100%);
  touch-action: none;
  overscroll-behavior: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

#stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

canvas#game {
  display: block;
  touch-action: none;
  box-shadow: 0 0 90px rgba(255, 150, 70, 0.10), 0 0 24px rgba(0, 0, 0, 0.8);
  border-radius: 6px;
}