document.addEventListener('DOMContentLoaded', function () {
const sections = document.querySelectorAll('.section');
function checkVisibility() {
const triggerBottom = window.innerHeight * 0.9;
sections.forEach(section => {
const sectionTop = section.getBoundingClientRect().top;
if (sectionTop < triggerBottom) {
section.classList.add('visible');
}
});
}
window.addEventListener('scroll', checkVisibility);
checkVisibility();
});
