* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: #f0f0f0;
  font-family: Arial, sans-serif;
}

.game-container {
  background-color: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

#gameCanvas {
  border: 2px solid #333;
  background-color: #fff;
  display: block;
  margin: 20px 0;
}

.score {
  font-size: 24px;
  font-weight: bold;
  color: #333;
  text-align: center;
  margin-bottom: 10px;
}

#speed {
  color: #007bff;
  margin-left: 15px;
}

.controls {
  text-align: center;
}

button {
  background-color: #4caf50;
  color: white;
  border: none;
  padding: 10px 20px;
  font-size: 16px;
  border-radius: 5px;
  cursor: pointer;
  margin: 10px 0;
  transition: background-color 0.3s;
}

button:hover {
  background-color: #45a049;
}

.instructions {
  margin-top: 15px;
  color: #666;
  font-size: 14px;
}

.instructions p {
  margin: 5px 0;
}