* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    background-color: #70c5ce;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    font-family: sans-serif;
  }
  
  #game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgb(0, 0, 9);
    color: rgb(2055, 0, 0, 0.9);
    font-size: 24px;
    padding: 20px 30px;
    border-radius: 10px;
    z-index: 10;
    text-align: center;
    display: none;
  }
  
  #game-over button:hover {
    background-color: #d63031;
  }
  
  #game {
    position: relative;
    width: 400px;
    height: 600px;
    background-color: #f1f3f3;
    overflow: hidden;
    border: 3px solid #000;
    border-radius: 10px;
  }
  
  #bird {
    position: absolute;
    width: 60px;
    height: 60px;
    background-image: url('https://pngimg.com/d/birds_PNG33.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    top: 250px;
    left: 100px;
    /* Add temporary background color to check */
    background-color: rgb(247, 241, 241);
  }
  
  .pipe {
    position: absolute;
    width: 40px;
    background-color: green;
  }
  
  .pipe.top {
    top: 0;
  }
  
  .pipe.bottom {
    bottom: 0;
  }
  
  #score {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 24px;
    font-weight: bold;
    color: #000;
  }