// Scroll depth tracking
var maxScroll = 0;
window.addEventListener('scroll', function() {
var pct = Math.round((window.scrollY / Math.max(1, document.body.scrollHeight - window.innerHeight)) * 100);
if (pct > maxScroll && pct % 25 === 0) {
maxScroll = pct;
gtag('event', 'scroll', { percent_scrolled: pct });
}
}, { passive: true });
// Time on page
var startTime = Date.now();
window.addEventListener('beforeunload', function() {
gtag('event', 'time_on_page', { seconds: Math.round((Date.now() - startTime) / 1000) });
});