Option 6 — Uniform density shrink

• Row 1 — Logo: crown 36→30px, wordmark 20→17px, subtitle 8→7px; header py 8→6px, gap 6→4px.
• Row 1 — Save: keep “SAVE SEARCH” label; padding 9×12→7×10, font 11→10px.
• Row 2 — Search: min-height 40→34px, font 13→12px, icon 16→14px.
• Row 3 — Filters: bar padding 6→4px; buttons 36→32px min-height; fonts −1px.
• Row 4 — Count/sort: row height 36→30px; count 12→11px; chip 11→10px.
• No removals — same 4 rows, same controls; map gains ~28px on a 390px phone.