The macOS reference is not a request to paste a desktop screenshot onto a website. It is a request for hierarchy: a stable toolbar, a discoverable sidebar, a content surface that carries focus, and controls that explain themselves.
Osbirds therefore keeps glass near the edges. The navigation and control layers can be translucent, while the post and article surfaces stay quiet. A visual effect should tell the reader where they are and what they can do; it should not ask the reader to admire the effect before reading.
The same rule continues onto smaller screens. Panes become drawers, the reading order stays intact, and keyboard and reduced-motion users receive the same information without depending on a gesture.