Ryan was nice enough to want to share the outcome of this large-to-small logo transition with the community. We ended up settling on a different approach from what’s shown in the GIF above. The large logo will scroll off the page, but once it has fully gone out of view, the standard header bar appears.
The generalized version of this theme-component can be found here:
Thanks again Ryan for wanting to share this and for being such a great person to work with.