html, body {
  margin: 0;
  padding: 0;
  background: #111;
  color: #f5f5f5;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  height: 100%;
  overflow: hidden;
}

#ui {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 10;
  background: rgba(0, 0, 0, 0.6);
  padding: 10px 14px;
  border-radius: 8px;
  backdrop-filter: blur(4px);
}

#ui h1 {
  margin: 0 0 4px 0;
  font-size: 18px;
}

#ui p {
  margin: 0;
  font-size: 13px;
  opacity: 0.85;
}

#gameCanvas {
  display: block;
  margin: 0 auto;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 12px;
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.8);
}