html, body {
    margin: 0;
    padding: 0;
    background-color: black;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    height: 100vh;
    touch-action: manipulation;
    user-select: none;
    overflow: hidden;
}

canvas {
    width: 100%;
    max-height: 100%;
    max-width: 100%;
    height: auto;
    aspect-ratio: 9 / 16;
    border: 2px solid white;
    background-color: black;
}

#mobile-controls {
    display: flex;
    gap: 10px;
    margin: 10px 0;
    justify-content: center;
}

#mobile-controls.hidden {
    display: none;
}

#mobile-controls button {
    padding: 12px 18px;
    font-size: 20px;
    background-color: #444;
    color: white;
    border: none;
    border-radius: 8px;
    min-width: 70px;
}

#mobile-controls button:active {
    background-color: #666;
}