body {
  margin: 0;
  background: #000;
  color: #0f0;
  font-family: "Consolas", monospace;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  text-align: center;
}

canvas {
  background: #111;
  border: 2px solid #0f0;
  display: block;
  margin: 0 auto;
}

.hidden {
  display: none;
}

#scoreDisplay {
  margin-top: 10px;
  font-size: 20px;
}

#gameOverScreen {
  margin-top: 20px;
}

button {
  background-color: #0f0;
  border: none;
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  border-radius: 5px;
  color: #000;
  font-weight: bold;
}

button:hover {
  background-color: #1f1;
}

footer {
  position: fixed;
  bottom: 10px;
  width: 100%;
  text-align: center;
  color: #0f0;
  font-family: "Consolas", monospace;
  font-size: 14px;
  opacity: 0.8;
}