script.js

// ===== Navigation scroll effect =====
const nav = document.getElementById('nav');
let lastScroll = 0;

window.addEventListener('scroll', () => {
    const currentScroll = window.scrollY;
    if (currentScroll > 50) {
        nav.classList.add('scrolled');
    } else {
        nav.classList.remove('scrolled');
    }
    lastScroll = currentScroll;
});

// ===== Mobile menu toggle =====
const navToggle = document.getElementById('nav-toggle');
const navLinks = document.getElementById('nav-links');

navToggle.addEventListener('click', () => {
    navLinks.classList.toggle('open');
    const spans = navToggle.querySelectorAll('span');
    if (navLinks.classList.contains('open')) {
        spans[0].style.transform = 'rotate(45deg) translate(5px, 5px)';
        spans[1].style.opacity = '0';
        spans[2].style.transform = 'rotate(-45deg) translate(5px, -5px)';
    } else {
        spans[0].style.transform = '';
        spans[1].style.opacity = '';
        spans[2].style.transform = '';
    }
});

// Close mobile menu on link click
navLinks.querySelectorAll('a').forEach(link => {
    link.addEventListener('click', () => {
        navLinks.classList.remove('open');
        const spans = navToggle.querySelectorAll('span');
        spans[0].style.transform = '';
        spans[1].style.opacity = '';
        spans[2].style.transform = '';
    });
});

// ===== Scroll animations (Intersection Observer) =====
const observerOptions = {
    threshold: 0.1,
    rootMargin: '0px 0px -50px 0px'
};

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

// Add fade-in class to elements we want to animate
document.addEventListener('DOMContentLoaded', () => {
    const animateElements = [
        ...document.querySelectorAll('.feature-card'),
        ...document.querySelectorAll('.tool-category'),
        ...document.querySelectorAll('.interaction-card'),
        ...document.querySelectorAll('.provider-card'),
        ...document.querySelectorAll('.security-card'),
        ...document.querySelectorAll('.security-extra'),
        ...document.querySelectorAll('.flow-step'),
        ...document.querySelectorAll('.section-header'),
    ];

    animateElements.forEach((el, i) => {
        el.classList.add('fade-in');
        el.style.transitionDelay = `${(i % 4) * 0.1}s`;
        observer.observe(el);
    });
});

// ===== Smooth scroll for anchor links =====
document.querySelectorAll('a[href^="#"]').forEach(anchor => {
    anchor.addEventListener('click', (e) => {
        e.preventDefault();
        const target = document.querySelector(anchor.getAttribute('href'));
        if (target) {
            const offsetTop = target.offsetTop - 80;
            window.scrollTo({
                top: offsetTop,
                behavior: 'smooth'
            });
        }
    });
});

// ===== Stat counter animation =====
function animateCounter(el, target, duration = 1500) {
    const start = 0;
    const startTime = performance.now();

    function update(currentTime) {
        const elapsed = currentTime - startTime;
        const progress = Math.min(elapsed / duration, 1);
        const eased = 1 - Math.pow(1 - progress, 3);
        const current = Math.round(start + (target - start) * eased);
        el.textContent = current;

        if (progress < 1) {
            requestAnimationFrame(update);
        }
    }

    requestAnimationFrame(update);
}

// Observe stat numbers and animate when visible
const statObserver = new IntersectionObserver((entries) => {
    entries.forEach(entry => {
        if (entry.isIntersecting) {
            const target = parseInt(entry.target.textContent);
            animateCounter(entry.target, target);
            statObserver.unobserve(entry.target);
        }
    });
}, { threshold: 0.5 });

document.querySelectorAll('.stat-number').forEach(el => {
    statObserver.observe(el);
});