NutrientStatusBarScrimDefaults

Blur applied to the content behind the strip.

How the strip's alpha follows its target, in both the visible-driven overload and the document-driven scrim. A critically damped spring rather than a tween: the target moves continuously while the page scrolls into the strip, and a spring tracks a moving target smoothly where a tween would restart on every change. The low stiffness makes it settle over roughly a third of a second — slow enough that the strip is never seen to switch, quick enough that a fling has fully covered the strip before the eye gets there. Critically damped so it never overshoots past full or below clear.

The tint painted over the blur, chosen to keep the status bar's icons legible: translucent white under dark icons, translucent black under light ones.