body {
  background: #050816;
  color: #fff;
  font-family: Arial, sans-serif;
}

#game-container {
  width: 600px;
  margin: 40px auto;
}

#sky {
  position: relative;
  height: 400px;
  background: url('../img/bg-space.jpg') center/cover no-repeat;
  overflow: hidden;
  border-radius: 8px;
}

#rocket {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translate(-50%, 0);
  transition: transform 0.1s linear;
  width: 64px;
}

#multiplier {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 3rem;
  text-shadow: 0 0 10px #000;
}

#controls {
  margin-top: 20px;
  text-align: center;
}