// Smooth scroll for anchor links
document.querySelectorAll('a[href^="#"]').forEach(anchor => {
    anchor.addEventListener('click', function (e) {
        e.preventDefault();
        const target = document.querySelector(this.getAttribute('href'));
        if (target) {
            const navHeight = document.querySelector('.nav').offsetHeight;
            const targetPosition = target.getBoundingClientRect().top + window.pageYOffset - navHeight;
            window.scrollTo({
                top: targetPosition,
                behavior: 'smooth'
            });
        }
    });
});

// Nav background on scroll
const nav = document.querySelector('.nav');
let lastScroll = 0;

window.addEventListener('scroll', () => {
    const currentScroll = window.pageYOffset;
    
    if (currentScroll > 100) {
        nav.style.boxShadow = '0 1px 3px rgba(0,0,0,0.1)';
    } else {
        nav.style.boxShadow = 'none';
    }
    
    lastScroll = currentScroll;
});

// Form submission handling
const form = document.querySelector('.contact-form');
if (form) {
    form.addEventListener('submit', async (e) => {
        const submitBtn = form.querySelector('button[type="submit"]');
        const originalText = submitBtn.textContent;
        
        // Show loading state
        submitBtn.textContent = 'Sending...';
        submitBtn.disabled = true;
        
        // If using Formspree, let it handle normally
        // This is just for UX feedback
        setTimeout(() => {
            submitBtn.textContent = originalText;
            submitBtn.disabled = false;
        }, 3000);
    });
}

// Intersection Observer for fade-in animations
const observerOptions = {
    root: null,
    rootMargin: '0px',
    threshold: 0.1
};

const observer = new IntersectionObserver((entries) => {
    entries.forEach(entry => {
        if (entry.isIntersecting) {
            entry.target.classList.add('visible');
            observer.unobserve(entry.target);
        }
    });
}, observerOptions);

// Observe elements (if you want fade-in effects, add .fade-in class to elements)
document.querySelectorAll('.fade-in').forEach(el => {
    observer.observe(el);
});