root font size is set in absolute units

[thatbudakguy]

evidently changing a user's preferred font size using the browser settings doesn't override the root font size set in CSS, which means that it can't make the text in Startwords rescale because we set the root size to 18px. thus, despite all other measurements being in rem, the root can't change, so none of those sizes will change.

setting the root to a relative version of 18px (something like 1.2rem) and making sure the rem() function still works should resolve this.