Spacing scale drives every padding & gap — never raw px. --sp-4 (12px) is THE panel gutter, shared by headers, filters, footer and the table's first cell.

--sp-0

2px · hairline gap

--sp-1

4px

--sp-2

6px · chip gap

--sp-3

8px · row gap

--sp-4

12px · panel gutter

--sp-5

16px · section

--sp-6

24px

--sp-7

40px · block