body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #222;
    font-family: Arial, sans-serif;
}

.game-container {
    text-align: center;
}

canvas {
    border: 2px solid white;
    background-color: black;
}

.score {
    color: white;
    font-size: 24px;
    margin-top: 10px;
}

.mobile-controls {
    display: none;
    position: relative;
    width: 180px;
    height: 180px;
    margin: 20px auto;
    transform: scale(0.9);
}

.control-btn {
    position: absolute;
    width: 60px;
    height: 60px;
    font-size: 24px;
    background-color: #444;
    color: white;
    border: none;
    border-radius: 50%;
    touch-action: manipulation;
    user-select: none;
}

.up {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
}

.down {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

.left {
    top: 50%;
    left: 0;
    transform: translateY(-50%);
}

.right {
    top: 50%;
    right: 0;
    transform: translateY(-50%);
}

.restart-btn {
    display: none;
    margin: 20px auto;
    padding: 10px 20px;
    font-size: 18px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.restart-btn:hover {
    background-color: #45a049;
}

@media (max-width: 768px) {
    .mobile-controls {
        display: block !important;
    }
    
    canvas {
        width: 100%;
        height: auto;
        max-width: 400px;
    }
}