:root{

    --bullet-color:rgb(251, 248, 248);
    --background-image:url('../../images/space.gif');
    --text-color:rgb(74, 73, 73);
    --tertiary-color:rgb(155, 155, 188);
    --border-color:blue;
    --background-menu:#4caf50;
    --background-gameOver:#f44336;
    
    
}

.dark-mode{
  --bullet-color:yellow;
    --background-image:url('../../images/space5.gif');
    --text-color:rgb(244, 240, 240);
    --tertiary-color:rgb(174, 174, 241);
    --background-menu:#0d7e0d;
    --background-gameOver:#a44933;



}




footer{
  height: 7vh;
  display: flex;
  align-items: center;
  justify-content: center;
  

}

footer ul{
  display: flex;
  
  align-items: center;
  justify-content: center;
  cursor: pointer;


} 

#left{
  height: 7vh;
  width: 7vh;
  rotate: 180deg;
  margin-right: 100px;
  border-radius: 50%;
  background-size: cover;
}

#right{
  height: 7vh;
  width: 7vh;
  border-radius: 50%;
  background-size: cover;
}
  
  .game-container {
    position: relative;
    height: 88vh;
    background:var(--background-image);
    background-size:cover;
    color:var(--text-color);
    
  }

  .menu {
    text-align: center;
  }
  
  .menu h1 {
    font-size: 3rem;
    margin-bottom: 20px;
  }
  
  .menu .btn {
    margin-top: 100px;
    padding: 10px 20px;
    font-size: 1.2rem;
    background: var(--background-menu);
    color: var(--text-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
    border:var(--text-color) 2px solid;
  }
  
  
  .hidden {
    display: none;
  }
  
  #rules {
    margin-top: 20px;
    font-size: 1.3rem;
    justify-self:center;
  }
  
  .game {
    position: relative;
    height:80vh;
  }
  
  .player {
    position:absolute;
    bottom: 0%;
    left: 50%;
    width: 80px;
    height: 80px;
    background: url('/images/ship.png') no-repeat center center;
    background-size: cover;
    transform: translateX(-50%);
  }

  .player:hover{
    cursor: pointer;
  }
  
  .enemy {
    position: absolute;
    top: -50px;
    width: 70px;
    height: 70px;
    background: url('/images/ufo.png') no-repeat center center;
    background-size: cover;
  }
  
  .bullet {
    position: absolute;
    width: 5px;
    height: 20px;
    background: var(--bullet-color);
    border-radius: 2px;
  }
  
  #score {
    position: absolute;
    font-weight: bold;
    top: 10px;
    left: 10px;
    font-size: 20px;
  }
  
  #game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
  }
  
  #game-over button {
    padding: 10px 20px;
    font-size: 1.2rem;
    background: var(--background-gameOver);
    color: var(--text-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
    border:var(--text-color) 2px solid;
  }
  
  
  
  @media (max-width: 768px) {
    .menu h1 {
      font-size: 2rem;
    }
  
    .menu .btn {
      font-size: 1rem;
      padding: 8px 15px;
    }
  
    #rules {
      font-size: 1rem;
    }

    .player{
      bottom: 0%;
    }

    .game {
      position: relative;
      height:75vh;
    }

    
  }