TIL - how to do a pretty good image popup thing, in HTML and CSS, no Javascript. Probably requires some kind of modern browser. Works for me on OSX/Safari.
I've never used the `transition` css property before. I still _kind_ of hate css, even though this is amazing (to me, anyway).
I don't like the flash when transitioning between images - I'm not sure how to fix that... When going from the page to the popup it is good, just when going from image to image it is distracting...