The ☰ rests at the bottom of a phone's first screen until the map's legend sheet announces itself, so
while the map loads, or for good if it fails, it covered the start of the full-width field. The row now
pads by the ☰'s footprint on both sides while the layout's --vtl-fab-lift is 0, and not at all once the
☰ lifts, easing with the ☰'s own .2s move (none under reduced motion).
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