body {
    margin: 0;
    background-color: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    height: 100dvh; /* Fallback for older browsers */
    overflow: hidden;
    -webkit-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

#game-container {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

#gameCanvas {
    background-color: #fff;
    display: block;
    aspect-ratio: 9 / 16;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}