const menuButton = document.querySelector('.menu-toggle');
const navLinks = document.querySelector('.nav-links');

if (menuButton && navLinks) {
    menuButton.addEventListener('click', () => {
        const isOpen = navLinks.dataset.open === 'true';
        navLinks.dataset.open = String(!isOpen);
        menuButton.setAttribute('aria-expanded', String(!isOpen));
    });

    navLinks.querySelectorAll('a').forEach((link) => {
        link.addEventListener('click', () => {
            navLinks.dataset.open = 'false';
            menuButton.setAttribute('aria-expanded', 'false');
        });

        const highlightTarget = () => {
            const targetId = link.getAttribute('href');
            if (!targetId || !targetId.startsWith('#')) {
                return;
            }

            const targetCard = document.querySelector(targetId);
            if (targetCard) {
                targetCard.classList.add('is-linked-hover');
                link.classList.add('is-linked');
            }
        };

        const clearTarget = () => {
            const targetId = link.getAttribute('href');
            if (!targetId || !targetId.startsWith('#')) {
                return;
            }

            const targetCard = document.querySelector(targetId);
            if (targetCard) {
                targetCard.classList.remove('is-linked-hover');
                link.classList.remove('is-linked');
            }
        };

        link.addEventListener('mouseenter', highlightTarget);
        link.addEventListener('mouseleave', clearTarget);
        link.addEventListener('focus', highlightTarget);
        link.addEventListener('blur', clearTarget);
    });
}

const revealElements = document.querySelectorAll('.reveal');

if ('IntersectionObserver' in window && revealElements.length > 0) {
    const observer = new IntersectionObserver(
        (entries, currentObserver) => {
            entries.forEach((entry) => {
                if (entry.isIntersecting) {
                    entry.target.classList.add('is-visible');
                    currentObserver.unobserve(entry.target);
                }
            });
        },
        { threshold: 0.2 }
    );

    revealElements.forEach((element) => observer.observe(element));
} else {
    revealElements.forEach((element) => element.classList.add('is-visible'));
}

const yearElement = document.getElementById('currentYear');
if (yearElement) {
    yearElement.textContent = new Date().getFullYear();
}