Seamless page transitions and a page full of motion

The site now moves the way it should. Small polish, big difference.

- Moving between pages is seamless. The navigation bar and footer stay put while
only the content crossfades, so there is no flash or reload between pages.
- The quieter pages — work, blog, team, status, and the legal pages — now fade
their content up gently as it comes into view.
- The changelog reveals each entry title word by word as you scroll, with a soft
focus-in effect.
- Cleaned up the team page so every card lines up at the same height again.