03 / sequence
The bar wipes in from the left rather than dropping from the top. A frozen copy of the component, so it archives the bar's motion only — the dock and trigger are current.
Nothing moves until the heading scrolls off. Scroll down, then back up.
0.6 × 100vh
The heading has not left yet. Nothing should have moved.
1.2 × 100vh
Origin is off-screen. The bar and the compact title are due.
1.8 × 100vh
Steady state. The bar should be sitting still, not settling.
2.4 × 100vh
Mid-scroll. Nothing here should retrigger anything.
3.0 × 100vh
Long scroll. Watch for drift on the docked mark.
3.6 × 100vh
Turn around here and scroll back up to see the retraction.