body, html {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #1a1a1a;
    font-family: Arial, sans-serif;
    color: #fff;
}

.game-container {
    position: relative;
}

#gameCanvas {
    background-color: #333;
    display: block;
}

#controls {
    position: absolute;
    top: 10px;
    left: 10px;
}

#controls button {
    width: 50px;
    height: 50px;
    margin: 5px;
    font-size: 24px;
    background-color: #555;
    border: none;
    color: white;
    border-radius: 5px;
}

#controls button:active {
    background-color: #777;
}

#score {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 24px;
}