body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f0f0;
    touch-action: none;
}

#game-container {
    position: relative;
    width: 100%;
    max-width: 600px;
}

#gameCanvas {
    width: 100%;
    background-color: white;
    border: 2px solid #333;
}

#score, #timer {
    position: absolute;
    top: 10px;
    padding: 5px 10px;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    border-radius: 5px;
}

#score {
    left: 10px;
}

#timer {
    right: 10px;
}

#startButton {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    padding: 10px 20px;
    font-size: 1.2em;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}