Thank you. I knew how to do front-end work using Bootstrap and jQuery, but I didn't really know how to do those functions with pure CSS and JS. It's important to have the experience of making a portfolio, but I think I learned a good lesson with CSS and JS as a practical example. You can follow along even if you don't know HTML CSS and JS, but as explained in the lecture introduction, I'd like to recommend it to those who know the basics. And there was noise in the lecture video, so it was uncomfortable to listen to it with earphones..