html, body {
  margin: 0;
  padding: 0;
  background: #050510;
  color: #fff;
  font-family: system-ui, sans-serif;
  height: 100%;
  overflow: hidden;
}

#gameCanvas {
  display: block;
  margin: 0 auto;
  background: radial-gradient(circle at center, #111 0%, #000 60%);
  border: 2px solid #3af;
}

#ui {
  position: fixed;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 20px;
  align-items: center;
}

#score, #highscore {
  font-size: 16px;
}

#restartBtn {
  padding: 6px 14px;
  border: 1px solid #3af;
  background: #050510;
  color: #3af;
  cursor: pointer;
}
#restartBtn:hover {
  background: #3af;
  color: #050510;
}