ECOM-811 design and layout changes

@wedaly @stephensanchez @rlucioni here are the style and text updates. Unfortunately I had to use teh dreaded !important in my Sass to override some ridiculously specific selectors, but after the A/B test we can clean this up by removing the legacy styles.
> A driver's license, passport, or government or ID with your name and picture

I didn't realize a government was a valid form of identification :wink: . You probably want to drop the extra "or" between  "government" and "ID"