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

// Simple animation on scroll
const observerOptions = {
    root: null,
    rootMargin: '0px',
    threshold: 0.1
};

const observer = new IntersectionObserver((entries) => {
    entries.forEach(entry => {
        if (entry.isIntersecting) {
            entry.target.classList.add('animate-fade-in');
        }
    });
}, observerOptions);

document.querySelectorAll('section').forEach(section => {
    observer.observe(section);
});

// Theme toggle functionality
function toggleTheme() {
    const html = document.documentElement;
    if (html.classList.contains('dark')) {
        html.classList.remove('dark');
        localStorage.theme = 'light';
    } else {
        html.classList.add('dark');
        localStorage.theme = 'dark';
    }
}

// Initialize theme based on system preference or localStorage
if (localStorage.theme === 'dark' || (!('theme' in localStorage) && window.matchMedia('(prefers-color-scheme: dark)').matches)) {
    document.documentElement.classList.add('dark');
} else {
    document.documentElement.classList.remove('dark');
}