All solutions

well, this is my firs proyect using SASS, is an incredible tool. I can improve this, I will appreciate your feedback.

Also use css transform 2d and 3d, clip-path, path, JS Web Animation Api, and i wrote some reusable classes. I enjoyed cooking it ;) .Maybe you like it, and I would like your opinion.

** note: the background animation slows down my pc, some recommendation to improve this?

Do you think it would be better with "a" tag instead of <input .."checkbox">?, there are few options without javascript, don't you think? How would you do it?