body {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: #f0f0f0;
  font-family: Arial, sans-serif;
  background: black;
  user-select: none;
}
*{user-select: none;}

#app {
  position: relative;
}

canvas {
    width: 100vw;
  border: 0;
  background-color: #fff;
}

.start-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: rgba(0, 0, 0, 0.7);
}

.start-button {
  padding: 15px 30px;
  font-size: 24px;
  font-weight: bold;
  color: #fff;
  background-color: #4CAF50;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s;
}

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

.game-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: rgba(0, 0, 0, 0.8);
  color: white;
  text-align: center;
}

.game-overlay-content {
  background-color: rgba(255, 255, 255, 0.9);
  padding: 30px;
  border-radius: 10px;
  color: #333;
}

.game-overlay-content h2 {
  margin-top: 0;
  font-size: 28px;
  color: #bd2424;
}

.game-overlay-content p {
  font-size: 18px;
  margin: 20px 0;
}

.game-overlay-content button {
  padding: 10px 20px;
  font-size: 16px;
  background-color: #2196F3;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.game-overlay-content button:hover {
  background-color: #1e88e5;
}