body {
  margin: 0;
  text-align: center;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  color: white;
}

h1 {
  margin: 15px;
}

#gameCanvas {
  background: #111;
  display: block;
  margin: auto;
  border: 3px solid #fff;
}

#score {
  margin-top: 15px;
  font-size: 20px;
  font-weight: bold;
}
#restartBtn {
  margin-top: 10px;
  padding: 10px 20px;
  background: #28a745;
  border: none;
  color: white;
  font-size: 16px;
  cursor: pointer;
  border-radius: 5px;
}
#restartBtn:hover {
  background: #218838;
}