body {
  font-family: Arial, sans-serif;
  text-align: center;
  margin: 0;
  padding: 0;
  background-color: #282c34;
  color: white;
}

#game {
  margin-top: 20px;
}

button {
  margin: 10px;
  padding: 10px 20px;
  font-size: 16px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:disabled {
  background-color: gray;
  cursor: not-allowed;
}

#start-game {
  background-color: green;
  color: white;
}

#cash-out {
  background-color: red;
  color: white;
}

#game-area {
  position: relative;
  margin: 50px auto;
  width: 80%;
  height: 300px;
  background-color: #20232a;
  overflow: hidden;
  border: 2px solid white;
}

#plane {
  position: absolute;
  width: 50px;
  height: 30px;
  background-color: yellow;
  border: 2px solid black;
  border-radius: 5px;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  transition: left 0.1s linear;
}