body {
  margin: 0;
  padding: 0;
  background: #111;
  color: #fff;
  font-family: Arial, sans-serif;
}

#gameContainer {
  position: relative;
  width: 800px;
  margin: 20px auto;
}

#feverBarContainer {
  width: 400px;
  height: 20px;
  background: #444;
  margin-bottom: 10px;
  border: 2px solid #222;
}

#feverBar {
  width: 0;
  height: 100%;
  background: red;
}

#message {
  font-size: 18px;
  margin-top: 8px;
  height: 24px;
}

canvas {
  background: #222;
  border: 2px solid #555;
}