body {
  margin: 0;
  font-family: sans-serif;
  background: black;
  color: white;
  text-align: center;
  overflow-x: hidden;
}

#game {
  position: relative;
  width: 100%;
  max-width: 90%;
  height: 80vh;
  margin: 0 auto;
  background: #000000;
  overflow: hidden;
  border: 2px solid white;
}

#score, #wave {
  position: absolute;
  top: 10px;
  font-size: 18px;
  font-family: Arial, sans-serif;
  color: white;
  z-index: 10;
}
#score {
  left: 10px;
}
#wave {
  right: 10px;
}

#player {
  position: absolute;
  bottom: 10px;
  left: 50%;
  width: 20px;
  height: 20px;
  background: black;
  transform: translateX(-50%);
}

.laser {
  position: absolute;
  width: 4px;
  height: 10px;
  background: red;
}

.enemy {
  position: absolute;
  width: 30px;
  height: 35px;
  background: black;
}

.enemy-laser {
  position: absolute;
  width: 4px;
  height: 12px;
  background: yellow;
  z-index: 5;
}

#game-over {
  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;
  font-size: 24px;
  z-index: 999;
  display: none;
}

#game-over button {
  margin-top: 20px;
  padding: 10px 20px;
  font-size: 18px;
  cursor: pointer;
}