body {
  background: #000;
  color: #fff;
  font-family: sans-serif;
  display: flow;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin: 0;
  padding: 20px;
}

h1 {
  margin-bottom: 10px;
}

.game {
  display: block;
  gap: 20px;
  align-items: flex-start;
}

canvas {
  background: #111;
  border: 2px solid #555;
}

.sidebar {
  display: block;
  flex-direction: column;
  gap: 10px;
}

#gameOverOverlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.8);
  color: white;
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 10;
}

#gameOverContent {
  text-align: center;
  background: #222;
  padding: 20px 30px;
  border-radius: 10px;
  box-shadow: 0 0 15px #000;
}

#gameOverContent button {
  margin-top: 10px;
  padding: 10px 20px;
  background: #fff;
  color: #000;
  font-size: 1rem;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}