#gamebox {
    width: 100%;
    max-width: 100%;
    aspect-ratio: 800 / 430;
    margin: 10px auto 56px;
    padding: 0;
    overflow: hidden;
    position: relative;
    border-radius: 14px;
    background: rgba(15, 23, 42, 0.82);
    border: 1px solid rgba(148, 163, 184, 0.26);
    box-shadow: 0 10px 28px rgba(2, 6, 23, 0.45);
}

#game-canvas {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 14px;
    background: #2d2f39;
}

@media (max-width: 768px) {
    #gamebox {
        border-radius: 12px;
    }

    #game-canvas {
        border-radius: 12px;
    }
}