// ========================================
// 메인 페이지 전용 JavaScript
// ========================================

document.addEventListener('DOMContentLoaded', function() {
    initMainPageAnimations();
    initCounterAnimation();
});

// ========================================
// 메인 페이지 애니메이션
// ========================================
function initMainPageAnimations() {
    // Hero 섹션 애니메이션
    const heroElements = document.querySelectorAll('.hero-title, .hero-description, .hero-buttons');
    heroElements.forEach((el, index) => {
        el.style.opacity = '0';
        el.style.transform = 'translateY(30px)';
        
        setTimeout(() => {
            el.style.transition = 'all 0.8s ease';
            el.style.opacity = '1';
            el.style.transform = 'translateY(0)';
        }, 100 * (index + 1));
    });
    
    // Feature 카드 애니메이션
    const observerOptions = {
        threshold: 0.2,
        rootMargin: '0px 0px -50px 0px'
    };
    
    const observer = new IntersectionObserver((entries) => {
        entries.forEach((entry, index) => {
            if (entry.isIntersecting) {
                setTimeout(() => {
                    entry.target.style.opacity = '1';
                    entry.target.style.transform = 'translateY(0)';
                }, index * 100);
                observer.unobserve(entry.target);
            }
        });
    }, observerOptions);
    
    // Feature 카드 초기 상태 설정 및 관찰
    document.querySelectorAll('.feature-card').forEach(card => {
        card.style.opacity = '0';
        card.style.transform = 'translateY(30px)';
        card.style.transition = 'all 0.6s ease';
        observer.observe(card);
    });
    
    // Service 아이템 애니메이션
    document.querySelectorAll('.service-item').forEach(item => {
        item.style.opacity = '0';
        item.style.transform = 'translateX(-30px)';
        item.style.transition = 'all 0.6s ease';
        observer.observe(item);
    });
}

// ========================================
// 카운터 애니메이션 (선택적)
// ========================================
function initCounterAnimation() {
    const counters = document.querySelectorAll('.counter');
    
    if (counters.length === 0) return;
    
    const animateCounter = (counter) => {
        const target = parseInt(counter.getAttribute('data-target'));
        const duration = 2000; // 2초
        const increment = target / (duration / 16); // 60fps 기준
        let current = 0;
        
        const updateCounter = () => {
            current += increment;
            if (current < target) {
                counter.textContent = Math.floor(current);
                requestAnimationFrame(updateCounter);
            } else {
                counter.textContent = target;
            }
        };
        
        updateCounter();
    };
    
    const counterObserver = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                animateCounter(entry.target);
                counterObserver.unobserve(entry.target);
            }
        });
    }, { threshold: 0.5 });
    
    counters.forEach(counter => {
        counterObserver.observe(counter);
    });
}

// ========================================
// 패럴랙스 효과 (선택적)
// ========================================
window.addEventListener('scroll', () => {
    const scrolled = window.pageYOffset;
    const parallaxElements = document.querySelectorAll('.parallax');
    
    parallaxElements.forEach(el => {
        const speed = el.getAttribute('data-speed') || 0.5;
        el.style.transform = `translateY(${scrolled * speed}px)`;
    });
});

// ========================================
// 마우스 호버 효과
// ========================================
document.querySelectorAll('.feature-card, .service-item').forEach(card => {
    card.addEventListener('mouseenter', function(e) {
        const rect = this.getBoundingClientRect();
        const x = e.clientX - rect.left;
        const y = e.clientY - rect.top;
        
        this.style.setProperty('--mouse-x', `${x}px`);
        this.style.setProperty('--mouse-y', `${y}px`);
    });
});