img {
    /* Mobile: kills long-press "Save image" sheet on iOS Safari + Android Chrome */
    -webkit-touch-callout: none !important;
    -webkit-user-select: none !important;
    user-select: none !important;

    /* Desktop: prevents drag-to-desktop */
    -webkit-user-drag: none;

    /* Prevent tap highlight flash on iOS */
    -webkit-tap-highlight-color: transparent;
}