You can do many things within this element.
Maybe a long terms of service positioned near the trigger.
this clever box doesn't hide the rest of your website.
It's positioned near related content.
If we keep filling in content, we will eventually get a scroll bar.
My Sass can definitely become smarter. Please copy/improve/dismantle/criticise.
Ps. I now use the latest version of Velocity and my problems with stopping the animation from running display none have been fixed.
Pps. I split out the overflow on the "&__inner" so that the bottom scroll bar would not appear during animation.