script.js

document.addEventListener('DOMContentLoaded', function() {
    // Animate elements on scroll
    const animateOnScroll = () => {
        const elements = document.querySelectorAll('.feature-card, .panel-preview, .data-card');
        
        elements.forEach(element => {
            const elementPosition = element.getBoundingClientRect().top;
            const screenPosition = window.innerHeight / 1.3;
            
            if (elementPosition < screenPosition) {
                element.style.opacity = '1';
                element.style.transform = 'translateY(0)';
            }
        });
    };
    
    // Set initial state for animation
    const featureCards = document.querySelectorAll('.feature-card');
    const panelPreviews = document.querySelectorAll('.panel-preview');
    const dataCards = document.querySelectorAll('.data-card');
    
    featureCards.forEach(card => {
        card.style.opacity = '0';
        card.style.transform = 'translateY(20px)';
        card.style.transition = 'opacity 0.6s ease, transform 0.6s ease';
    });
    
    panelPreviews.forEach(panel => {
        panel.style.opacity = '0';
        panel.style.transform = 'translateY(30px)';
        panel.style.transition = 'opacity 0.8s ease, transform 0.8s ease';
    });
    
    dataCards.forEach(card => {
        card.style.opacity = '0';
        card.style.transform = 'translateY(20px)';
        card.style.transition = 'opacity 0.6s ease, transform 0.6s ease';
    });
    
    // Run animation on load and scroll
    animateOnScroll();
    window.addEventListener('scroll', animateOnScroll);
    
    // Smooth scrolling for anchor links
    document.querySelectorAll('a[href^="#"]').forEach(anchor => {
        anchor.addEventListener('click', function(e) {
            e.preventDefault();
            
            const targetId = this.getAttribute('href');
            if (targetId === '#') return;
            
            const targetElement = document.querySelector(targetId);
            if (targetElement) {
                window.scrollTo({
                    top: targetElement.offsetTop - 100,
                    behavior: 'smooth'
                });
            }
        });
    });
    
    // Add hover effect to buttons
    const buttons = document.querySelectorAll('.btn');
    buttons.forEach(button => {
        button.addEventListener('mouseenter', function() {
            this.style.transform = 'translateY(-3px)';
        });
        
        button.addEventListener('mouseleave', function() {
            this.style.transform = 'translateY(0)';
        });
    });
    
    // Add parallax effect to header
    const header = document.querySelector('.stellar-header');
    window.addEventListener('scroll', function() {
        const scrollPosition = window.pageYOffset;
        header.style.backgroundPositionY = scrollPosition * 0.5 + 'px';
    });
    
    // Console greeting
    console.log('%c🚀 Welcome to Cosmic Explorer!', 'font-size: 18px; color: #6c5ce7; font-weight: bold;');
    console.log('%cExplore the universe with our interactive visualizations.', 'font-size: 14px; color: #00cec9;');
});