// Mobile Navigation Toggle
document.addEventListener('DOMContentLoaded', function() {
    const hamburger = document.querySelector('.hamburger');
    const navLinks = document.querySelector('.nav-links');
    
    hamburger.addEventListener('click', function() {
        navLinks.classList.toggle('active');
        hamburger.classList.toggle('active');
    });

    // Close mobile nav when clicking on a link
    document.querySelectorAll('.nav-links a').forEach(link => {
        link.addEventListener('click', () => {
            navLinks.classList.remove('active');
            hamburger.classList.remove('active');
        });
    });
});

// Smooth scrolling for navigation links
document.querySelectorAll('a[href^="#"]').forEach(anchor => {
    anchor.addEventListener('click', function (e) {
        e.preventDefault();
        const target = document.querySelector(this.getAttribute('href'));
        if (target) {
            target.scrollIntoView({
                behavior: 'smooth',
                block: 'start'
            });
        }
    });
});

// Navbar background on scroll
window.addEventListener('scroll', function() {
    const navbar = document.querySelector('.navbar');
    if (window.scrollY > 100) {
        navbar.style.background = 'rgba(10, 10, 10, 0.98)';
    } else {
        navbar.style.background = 'rgba(10, 10, 10, 0.95)';
    }
});

// Intersection Observer for animations
const observeElements = () => {
    const observer = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                entry.target.style.opacity = '1';
                entry.target.style.transform = 'translateY(0)';
            }
        });
    }, {
        threshold: 0.1,
        rootMargin: '0px 0px -50px 0px'
    });

    // Observe project cards
    document.querySelectorAll('.project-card').forEach(card => {
        card.style.opacity = '0';
        card.style.transform = 'translateY(30px)';
        card.style.transition = 'opacity 0.6s ease, transform 0.6s ease';
        observer.observe(card);
    });

    // Observe tech items
    document.querySelectorAll('.tech-item').forEach((item, index) => {
        item.style.opacity = '0';
        item.style.transform = 'translateY(30px)';
        item.style.transition = `opacity 0.6s ease ${index * 0.1}s, transform 0.6s ease ${index * 0.1}s`;
        observer.observe(item);
    });

    // Observe contact cards
    document.querySelectorAll('.contact-card').forEach((card, index) => {
        card.style.opacity = '0';
        card.style.transform = 'translateY(30px)';
        card.style.transition = `opacity 0.6s ease ${index * 0.2}s, transform 0.6s ease ${index * 0.2}s`;
        observer.observe(card);
    });
};

// Initialize animations when DOM is loaded
document.addEventListener('DOMContentLoaded', observeElements);

// Add hover effects for project cards
document.querySelectorAll('.project-card').forEach(card => {
    card.addEventListener('mouseenter', function() {
        this.style.transform = 'translateY(-10px) scale(1.02)';
    });
    
    card.addEventListener('mouseleave', function() {
        this.style.transform = 'translateY(0) scale(1)';
    });
});

// Typing effect for hero text (optional enhancement)
const typeWriter = (element, text, speed = 100) => {
    let i = 0;
    element.innerHTML = '';
    const timer = setInterval(() => {
        if (i < text.length) {
            element.innerHTML += text.charAt(i);
            i++;
        } else {
            clearInterval(timer);
        }
    }, speed);
};

// Add some interactive particles (optional)
const createParticles = () => {
    const particles = document.createElement('div');
    particles.className = 'particles';
    particles.style.cssText = `
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        pointer-events: none;
        z-index: 0;
    `;
    
    for (let i = 0; i < 50; i++) {
        const particle = document.createElement('div');
        particle.style.cssText = `
            position: absolute;
            width: 2px;
            height: 2px;
            background: rgba(0, 212, 255, 0.5);
            border-radius: 50%;
            animation: float ${Math.random() * 3 + 2}s ease-in-out infinite;
            left: ${Math.random() * 100}%;
            top: ${Math.random() * 100}%;
            animation-delay: ${Math.random() * 2}s;
        `;
        particles.appendChild(particle);
    }
    
    document.body.appendChild(particles);
};

// Initialize particles on hero section
document.addEventListener('DOMContentLoaded', () => {
    if (window.innerWidth > 768) {
        // createParticles();
    }
});

// Add active state to navigation links based on scroll position
const updateActiveNav = () => {
    const sections = document.querySelectorAll('section[id]');
    const navLinks = document.querySelectorAll('.nav-links a[href^="#"]');
    
    let current = '';
    
    sections.forEach(section => {
        const sectionTop = section.offsetTop;
        const sectionHeight = section.clientHeight;
        if (pageYOffset >= sectionTop - 200) {
            current = section.getAttribute('id');
        }
    });
    
    navLinks.forEach(link => {
        link.classList.remove('active');
        if (link.getAttribute('href') === `#${current}`) {
            link.classList.add('active');
        }
    });
};

window.addEventListener('scroll', updateActiveNav);

// Add CSS for active nav links
const style = document.createElement('style');
style.textContent = `
    .nav-links a.active {
        color: #00d4ff !important;
    }
    
    .nav-links a.active::before {
        width: 100% !important;
    }
    
    @media (max-width: 768px) {
        .nav-links {
            position: fixed;
            top: 70px;
            right: -100%;
            width: 100%;
            height: calc(100vh - 70px);
            background: rgba(10, 10, 10, 0.98);
            flex-direction: column;
            justify-content: flex-start;
            align-items: center;
            padding-top: 2rem;
            transition: right 0.3s ease;
        }
        
        .nav-links.active {
            right: 0;
        }
        
        .hamburger.active span:nth-child(1) {
            transform: rotate(-45deg) translate(-5px, 6px);
        }
        
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        
        .hamburger.active span:nth-child(3) {
            transform: rotate(45deg) translate(-5px, -6px);
        }
    }
`;

document.head.appendChild(style);