The CSS code for this webpage was copied off the Dashboard example of Bootstrap.
I'm very thankful to DoumanAsh-sensei for providing me with the beautiful book-style CSS. I've copy-pasted and modified all of his code from his NazeBoku translations, and you must thank him for the helping me set up Travis CI with mdbook, that generates the ebook output, plus the tiny print button that will appear on top of every volume! ^^