> It works on mobile as long as I remember to keep my thumb away from the edge so I don't just scroll the outer page.
I usually don't like to comment on page issues, but since yours is the top comment, just wanted to put down my objection, lest I see in horror someone else copy this design.
If you have a "dual scroll bar" problem, just stop right there, your site is broken. I didn't even bother reading the whole thing because I thought scrolling was highjacked and I couldn't tell how long the article was. I despised everything about this design.