function showPage(pageNumber) {
const container = document.getElementById('lessons-container');
container.innerHTML = "";
document.querySelectorAll('.page-btn').forEach((btn, index) => {
btn.classList.toggle('active', index + 1 === pageNumber);
});
const start = (pageNumber - 1) * lessonsPerPage + 1;
const end = Math.min(pageNumber * lessonsPerPage, totalLessons);
for (let i = start; i <= end; i++) {
const fileName = `audio/${config.prefix}${i}${config.extension}`;
container.innerHTML += `
`;
}
window.scrollTo(0, 300);
}
window.onload = () => showPage(1);
