:root {
  /* Game-tuned CRT defaults; can be adjusted live via shared controls */
  --crt-radius: 12px;
  --crt-scanline-spacing: 2px;
  --crt-scanline-thickness: 1px;
  --crt-scanline-alpha: 0.12;
  --crt-scanline-opacity: 0.55;
  --crt-aperture-opacity: 0.16;
  --crt-vignette-gradient: radial-gradient(ellipse at center, rgba(255,255,255,0.03) 0%, rgba(0,0,0,0.44) 70%, rgba(0,0,0,0.7) 100%);
  --crt-vignette-opacity: 1;
  --crt-glow-shadow: inset 0 0 70px rgba(0, 180, 255, 0.16);
}

/* Fit the screen nicely like the other games */
.bubble-screen {
  width: min(96vw, 1180px);
  aspect-ratio: 4 / 3;
  margin: 0 auto;
}

canvas#game {
  image-rendering: pixelated;
  width: 100%;
  height: 100%;
  display: block;
}

.retro-hud .title { letter-spacing: 0.08em; }