Thanks, very nice of you to note that, and I'll fix. The SSG behind it has some updates coming to improve mobile rendering for sidenotes etc already, will add more :)

Drag corner... hmm... seems a change in recent browsers - that has not changed in the website implementation since it worked in all three (FireFox, Chrome, Safari.) And I may have to break my no-Javascript ethos to get it working again!

> UI needs to be approachable, useful, and unobtrusive. i.e. "forgettable." Many designers absolutely can't stand the idea of designing stuff that no one pays attention to; but that's actually exactly what most UI needs to be.

You can be all those things without being forgettable. What matters to the user is the cohesiveness of the whole experience, not individual widgets. People use apps, they don’t just stand there looking at it like a video playing.