fix(levels): use uniform padding on operator box grid

- Replaced separate pl, pr, py with uniform p: '2'
- Ensures equal padding on all sides (left, right, top, bottom)

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Co-Authored-By: Claude <noreply@anthropic.com>

apps/web/src/app/levels/page.tsx

@@ -689,9 +689,7 @@ export default function LevelsPage() {
                           display: 'grid',
                           gridTemplateColumns: 'repeat(2, 1fr)',
                           gap: '2',
-                          pr: '3',
-                          pl: '2',
-                          py: '2',
+                          p: '2',
                           maxW: '400px',
                           alignContent: 'center',
                         })}