I\'ve looked at many \"mysterious white-space at bottom of page\" issues here on SO, and played with the viewporttag many times, but I still cannot figure out w
This seems to fix the problem:
to .width: 25em; on .sub_container_div in your mobile CSS so that the container scales with the width of the view.If you do not want the font to scale, it seems just adding initial-scale=0 will work as well. However, this will make the text very hard to read. You can play around with different scales, but it seems just setting it will fix your issue.