Small styling adjustments
#30 Removed width, but added margins to ensure styling with images and inline content that otherwise flows to the edge.

Also, greatly improved image handling by adding border bottom to cut of images instead of using padding. Padding now fixed 25px (hope that's okay).
#25 removed need for z-index by moving lightbox to the bottom of the screen instead of the top. We could still add a z-index to make it more compatible with pages that have a positioned and z-indexed element as a direkt child from body.
Added comment
Rearranged styles