function downloadFile(fileName, content, contentType) {
    const blob = new Blob([content], { type: contentType });
    const url = window.URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = fileName;
    document.body.appendChild(a);
    a.click();
    document.body.removeChild(a);
    window.URL.revokeObjectURL(url);
}

function setFullscreen(isFull) {
    const sidebar = document.querySelector('.sidebar'); 
    const mainContent = document.querySelector('main'); 

    if (sidebar && mainContent) {
        if (!isFull) {
            sidebar.classList.remove('hidden');
            if (document.exitFullscreen) {
                document.exitFullscreen();
            } else if (document.mozCancelFullScreen) {
                document.mozCancelFullScreen();
            } else if (document.webkitExitFullscreen) {
                document.webkitExitFullscreen();
            } else if (document.msExitFullscreen) {
                document.msExitFullscreen();
            }
        } else {
            sidebar.classList.add('hidden');
            if (document.documentElement.requestFullscreen) {
                document.documentElement.requestFullscreen();
            } else if (document.documentElement.mozRequestFullScreen) {
                document.documentElement.mozRequestFullScreen();
            } else if (document.documentElement.webkitRequestFullscreen) {
                document.documentElement.webkitRequestFullscreen();
            } else if (document.documentElement.msRequestFullscreen) {
                document.documentElement.msRequestFullscreen();
            }
        }
    }
}