intro section with dropdwon menu made with html 5, css and bootstrap

I don't know javascript yet, i've been studing html and css. I could not complete the sidebar for the mobile version so i did it my own way :) , is it possible to make the sidebar as requested without using javascript? it was a really interesting challenge, i started by using bootstrap and when i got to the mobile version, i needed to reshape almost everything, and applying css properties with bootstrap was not easy. waiting for feedback! thanks in advance :)