body {
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #282c34;
    color: white;
    font-family: Arial, sans-serif;
}

#game-container {
    position: relative;
}

#gameCanvas {
    border: 2px solid #fff;
    background-color: #000;
}

#scoreBoard, #timeBoard, #bulletColor {
    margin-top: 10px;
}

#bulletColor span {
    display: inline-block;
    width: 50px;
    height: 20px;
    margin-left: 10px;
}

#saveScoreBtn {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 1000;

    padding: 15px 30px;
    font-size: 22px;
    border-radius: 10px;
}
#restartBtn {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}

#startScreen {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background: rgba(255,255,255,0.9);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    z-index: 1000;
}

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