html,
body {
    /* Disables pinch-zoom and double-tap zoom. The viewport meta tag alone isn't enough:
       iOS Safari has ignored user-scalable=no/maximum-scale on purpose since iOS 10. */
    touch-action: pan-x pan-y;

    /* Disables the scroll bounce effect (pull-to-refresh) on iOS/Android. */
    overscroll-behavior: none;
}

body {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;

    /* iOS long-press context menu (Copy/Share). */
    -webkit-touch-callout: none;
}

img {
    /* Prevents the drag "ghost" image without blocking clicks. */
    -webkit-user-drag: none;
    user-drag: none;
}