html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: radial-gradient(circle at top, #0b2a44, #02111d);
  font-family: Arial, sans-serif;
}

canvas {
  display: block;
}

/* Scrolling sparkling message */
#message {
  position: absolute;
  top: 20px;
  white-space: nowrap;
  font-size: 38px;
  font-weight: bold;
  color: gold;
  animation:
    scroll 18s linear infinite,
    sparkle 1.5s ease-in-out infinite;
  text-shadow:
    0 0 5px gold,
    0 0 15px gold,
    0 0 30px rgba(255, 215, 0, 0.8);
}

/* Music hint */
#hint {
  position: absolute;
  bottom: 20px;
  width: 100%;
  text-align: center;
  font-size: 18px;
  color: white;
  opacity: 0.85;
}

@keyframes scroll {
  from { left: 100%; }
  to { left: -100%; }
}

@keyframes sparkle {
  0% { filter: brightness(1); }
  50% { filter: brightness(1.7); }
  100% { filter: brightness(1); }
}