* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: #111;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

#startScreen {
  text-align: center;
  color: white;
}

#startBtn {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
}

#gameArea {
  width: 300px;
  height: 500px;
  background: #555;
  position: relative;
  overflow: hidden;
  border: 3px solid white;
}

.hide {
  display: none;
}

.car {
  width: 50px;
  height: 90px;
  position: absolute;
  bottom: 10px;
  background: red;
  border-radius: 8px;
}

.enemy {
  width: 50px;
  height: 90px;
  background: black;
  position: absolute;
  top: -100px;
  border-radius: 8px;
}

#score {
  position: absolute;
  top: 10px;
  left: 10px;
  color: white;
  font-size: 18px;
}