- .card--client gets 0.85rem of bottom padding so wrapping client
names ("Perennial Promise Growers' Cooperative", "Common Good
Management Services") no longer butt up against the bottom edge of
the tile row.
- .section--headless top margin grows ~2x (clamp 1.25-2 -> 2.75-4.5)
so a nested testimonial sits comfortably below the section it's
attached to.
- New .section--headless + .section selector shrinks the next
section's top margin so the testimonial's bottom whitespace
doesn't double-pad before whatever comes after it.
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