/**
 * Back to Top Button Functionality
 * 
 * Controls the visibility and behavior of the back to top button
 * based on scroll position.
 */
document.addEventListener('DOMContentLoaded', function() {
    const backToTopBtn = document.getElementById('back-to-top-btn');
    
    if (!backToTopBtn) return;
    
    // Show/hide button based on scroll position
    window.addEventListener('scroll', function() {
        if (window.pageYOffset > 300) {
            backToTopBtn.classList.add('show');
        } else {
            backToTopBtn.classList.remove('show');
        }
    });
    
    // Smooth scroll to top when clicked
    backToTopBtn.addEventListener('click', function(e) {
        e.preventDefault();
        window.scrollTo({
            top: 0,
            behavior: 'smooth'
        });
    });
});