window.addEventListener('DOMContentLoaded', function () {
    const loading = document.querySelector('.loading');
    const body = document.body;
    const video = document.querySelector('.loading-bg-video');
    if (!loading || !video) return;
    const hasVisited = sessionStorage.getItem('hasVisited');
    if (hasVisited) {
        loading.style.display = 'none';
        body.style.overflow = 'auto';
        return;
    }
    const startLoadingAnim = () => {
        if (!loading.classList.contains('show')) {
            loading.classList.add('show');
            sessionStorage.setItem('hasVisited', 'true');
            setTimeout(function () {
                loading.classList.add('fade-out');
            }, 6000);
        }
    };
    if (video.readyState >= 3) {
        startLoadingAnim();
    } else {
        video.addEventListener('canplaythrough', startLoadingAnim, { once: true });
    }
    loading.addEventListener('transitionend', function (event) {
        if (event.propertyName === 'opacity' && loading.classList.contains('fade-out')) {
            loading.style.display = 'none';
            body.style.overflow = 'auto';
        }
    });
    setTimeout(startLoadingAnim, 3000);
});