document.addEventListener('DOMContentLoaded', function() {
    // Enhanced parallax effect
    const parallaxLayers = document.querySelectorAll('.parallax-layer');
    let ticking = false;
    let lastScrollY = 0;

    function updateParallax() {
        const scrollY = window.pageYOffset;
        const windowHeight = window.innerHeight;
        const documentHeight = document.body.scrollHeight;
        
        parallaxLayers.forEach(layer => {
            const depth = parseFloat(layer.getAttribute('data-depth'));
            const layerOffset = layer.getBoundingClientRect().top;
            const layerHeight = layer.offsetHeight;
            
            // Calculate position in viewport (0-1)
            const viewportPosition = (layerOffset + layerHeight) / (windowHeight + layerHeight);
            
            // Enhanced movement calculation with easing
            const movement = -(scrollY * depth * (0.5 + viewportPosition * 0.5));
            
            // Apply transform with hardware acceleration
            layer.style.transform = `translate3d(0, ${movement}px, 0)`;
            
            // Optional: Add perspective for more depth
            layer.style.perspective = '1000px';
            layer.style.backfaceVisibility = 'hidden';
        });
        
        ticking = false;
    }

    function onScroll() {
        lastScrollY = window.scrollY;
        if (!ticking) {
            window.requestAnimationFrame(updateParallax);
            ticking = true;
        }
    }

    window.addEventListener('scroll', onScroll, { passive: true });
    window.addEventListener('resize', updateParallax);
    
    // Initial call
    updateParallax();
    // Enhanced horizontal scroll for testimonials with momentum
    function setupHorizontalScroll() {
        const track = document.querySelector('.testimonial-track');
        if (!track) return;

        let isDown = false;
        let startX;
        let scrollLeft;
        let velocity = 0;
        let animationFrame;
        let lastTime = 0;

        track.addEventListener('mousedown', (e) => {
            isDown = true;
            startX = e.pageX - track.offsetLeft;
            scrollLeft = track.scrollLeft;
            cancelAnimationFrame(animationFrame);
        });

        track.addEventListener('mouseleave', () => {
            isDown = false;
            applyMomentum();
        });

        track.addEventListener('mouseup', () => {
            isDown = false;
            applyMomentum();
        });

        track.addEventListener('mousemove', (e) => {
            if(!isDown) return;
            e.preventDefault();
            const x = e.pageX - track.offsetLeft;
            const walk = (x - startX) * 3; // faster scroll
            track.scrollLeft = scrollLeft - walk;
            velocity = walk - (scrollLeft - track.scrollLeft);
        });

        function applyMomentum() {
            if (Math.abs(velocity) > 1) {
                track.scrollLeft += velocity;
                velocity *= 0.95; // friction
                animationFrame = requestAnimationFrame(applyMomentum);
            }
        }

        // Touch support
        track.addEventListener('touchstart', (e) => {
            isDown = true;
            startX = e.touches[0].pageX - track.offsetLeft;
            scrollLeft = track.scrollLeft;
            cancelAnimationFrame(animationFrame);
        });

        track.addEventListener('touchend', () => {
            isDown = false;
            applyMomentum();
        });

        track.addEventListener('touchmove', (e) => {
            if(!isDown) return;
            const x = e.touches[0].pageX - track.offsetLeft;
            const walk = (x - startX) * 3;
            track.scrollLeft = scrollLeft - walk;
            velocity = walk - (scrollLeft - track.scrollLeft);
        });
    }

    setupHorizontalScroll();
// Animation on scroll
const animateOnScroll = function() {
    const elements = document.querySelectorAll('.service-card, .testimonial-card');
    elements.forEach(element => {
        const elementPosition = element.getBoundingClientRect().top;
        const windowHeight = window.innerHeight;
        
        if (elementPosition < windowHeight - 100) {
            element.classList.add('animate-fadeInUp');
        }
    });
};

window.addEventListener('scroll', animateOnScroll);
animateOnScroll();
// Smooth scroll for anchor links
document.querySelectorAll('a[href^="#"]').forEach(anchor => {
anchor.addEventListener('click', function (e) {
            e.preventDefault();
            
            const targetId = this.getAttribute('href');
            if (targetId === '#') return;
            
            const targetElement = document.querySelector(targetId);
            if (targetElement) {
                targetElement.scrollIntoView({
                    behavior: 'smooth',
                    block: 'start'
                });
            }
        });
    });
    // Animation on scroll
    const animateOnScroll = function() {
        const elements = document.querySelectorAll('.service-card, .testimonial-card');
elements.forEach(element => {
            const elementPosition = element.getBoundingClientRect().top;
            const windowHeight = window.innerHeight;
            
            if (elementPosition < windowHeight - 100) {
                element.classList.add('animate-fadeInUp');
            }
        });
    };

    window.addEventListener('scroll', animateOnScroll);
    animateOnScroll(); // Initial check
});