html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
    /* Prevent browser gestures from interfering with app */
    touch-action: none;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
    /* Prevent double-tap zoom */
    -ms-touch-action: manipulation;
}

/* Prevent pull-to-refresh on mobile */
body {
    overscroll-behavior: none;
}

/* Canvas should handle its own touch events */
canvas {
    touch-action: none;
}