* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0a0512;
}

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: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(180deg, #0f0819 0%, #2b1140 42%, #6b2a48 76%, #241026 100%);
}

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

canvas {
  display: block;
  touch-action: none;
  background: #0b0614;
  box-shadow: 0 0 70px rgba(140, 70, 200, 0.22);
  border-radius: 3px;
}