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- Output panel renders first on mobile (CSS order swap) - Prompt + Run button immediately below output - Mode/config hidden behind "Mode: Brainstorm" collapsible toggle - Tapping toggle expands full mode grid + model config - Compact header nav with smaller text - 3-column mode grid on mobile (was 4) - Larger run button (16px font, 14px padding) for touch - Full-width repipe modal and history panel on mobile - Desktop layout unchanged (toggle hidden, collapse always open) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>