body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  background-color: #203d2d;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
}

h1 {
  margin-top: 20px;
  color: #d4f5e6;
}

#controls {
  margin: 10px;
}

button {
  margin: 5px;
  padding: 10px 20px;
  background-color: #5ba57b;
  border: none;
  border-radius: 5px;
  color: white;
  cursor: pointer;
}

canvas {
  background-color: #2b5742;
  border: 4px solid #3d8e6e;
  touch-action: none; 
}

#gameOverScreen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0,0,0,0.9);
  color: white;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

#gameOverScreen.hidden {
  display: none;
}