script.js

// Mobile Navigation Toggle
const hamburger = document.querySelector('.hamburger');
const navMenu = document.querySelector('.nav-menu');

hamburger.addEventListener('click', () => {
    hamburger.classList.toggle('active');
    navMenu.classList.toggle('active');
});

// Close mobile menu when clicking on a link
document.querySelectorAll('.nav-link').forEach(n => n.addEventListener('click', () => {
    hamburger.classList.remove('active');
    navMenu.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 change on scroll
window.addEventListener('scroll', () => {
    const navbar = document.querySelector('.navbar');
    if (window.scrollY > 100) {
        navbar.style.background = 'rgba(255, 255, 255, 0.98)';
        navbar.style.boxShadow = '0 2px 20px rgba(0, 0, 0, 0.1)';
    } else {
        navbar.style.background = 'rgba(255, 255, 255, 0.95)';
        navbar.style.boxShadow = 'none';
    }
});

// Scroll animations
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');
        }
    });
}, observerOptions);

// Observe elements for animation
document.addEventListener('DOMContentLoaded', () => {
    const animateElements = document.querySelectorAll('.timeline-item, .project-card, .skill-category, .contact-item, .stat-item');
    
    animateElements.forEach(el => {
        el.classList.add('fade-in');
        observer.observe(el);
    });
});

// Active navigation link highlighting
const sections = document.querySelectorAll('section[id]');
const navLinks = document.querySelectorAll('.nav-link');

window.addEventListener('scroll', () => {
    let current = '';
    const scrollPosition = window.scrollY + 100;

    sections.forEach(section => {
        const sectionTop = section.offsetTop;
        const sectionHeight = section.offsetHeight;
        
        if (scrollPosition >= sectionTop && scrollPosition < sectionTop + sectionHeight) {
            current = section.getAttribute('id');
        }
    });

    navLinks.forEach(link => {
        link.classList.remove('active');
        if (link.getAttribute('href') === `#${current}`) {
            link.classList.add('active');
        }
    });
});

// Typing effect for hero title (optional enhancement)
function typeWriter(element, text, speed = 100) {
    let i = 0;
    element.innerHTML = '';
    
    function type() {
        if (i < text.length) {
            element.innerHTML += text.charAt(i);
            i++;
            setTimeout(type, speed);
        }
    }
    
    type();
}

// Initialize typing effect when page loads
document.addEventListener('DOMContentLoaded', () => {
    const heroTitle = document.querySelector('.hero-title');
    if (heroTitle) {
        const originalText = heroTitle.innerHTML;
        // Uncomment the line below to enable typing effect
        // typeWriter(heroTitle, originalText, 50);
    }
});

// Add loading animation
window.addEventListener('load', () => {
    document.body.classList.add('loaded');
});

// Contact form validation (if you add a contact form later)
function validateEmail(email) {
    const re = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    return re.test(email);
}

// Add some interactive hover effects
document.addEventListener('DOMContentLoaded', () => {
    // Add hover effects to skill tags
    const skillTags = document.querySelectorAll('.skill-tag');
    skillTags.forEach(tag => {
        tag.addEventListener('mouseenter', () => {
            tag.style.transform = 'translateY(-3px) scale(1.05)';
        });
        
        tag.addEventListener('mouseleave', () => {
            tag.style.transform = 'translateY(0) scale(1)';
        });
    });

    // Add hover effects to project cards
    const projectCards = document.querySelectorAll('.project-card');
    projectCards.forEach(card => {
        card.addEventListener('mouseenter', () => {
            card.style.transform = 'translateY(-8px)';
        });
        
        card.addEventListener('mouseleave', () => {
            card.style.transform = 'translateY(0)';
        });
    });
});

// Parallax effect for hero section (subtle)
window.addEventListener('scroll', () => {
    const scrolled = window.pageYOffset;
    const hero = document.querySelector('.hero');
    if (hero) {
        const rate = scrolled * -0.5;
        hero.style.transform = `translateY(${rate}px)`;
    }
});

// Add CSS for active navigation link
const style = document.createElement('style');
style.textContent = `
    .nav-link.active {
        color: #2563eb !important;
    }
    
    .nav-link.active::after {
        width: 100% !important;
    }
    
    body.loaded {
        opacity: 1;
    }
    
    body {
        opacity: 0;
        transition: opacity 0.5s ease;
    }
`;
document.head.appendChild(style);