docs: Update build-progress.txt for subtask 4.5
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@@ -334,3 +334,46 @@ Implementation details:
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Committed: 443ec4c
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Committed: 443ec4c
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Status: ✓ Completed
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Status: ✓ Completed
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Committed: 443ec4c
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Status: ✓ Completed
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=== 2026-01-11 - Subtask 4.5 Completed ===
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Added conceptual explanations to layouts module (07-layouts.json).
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Implementation details:
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- Added 'concept' objects to all 4 lessons explaining different layout systems and when to use each approach
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- Lesson 1 (Flex Basics):
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* Explanation of Flexbox as one-dimensional layout system with main/cross axes
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* Diagram showing flexbox container with axis alignment (justify-content for main axis, align-items for cross axis)
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* Visual comparison of default behavior vs centered layout
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* Main axis vs cross axis distinction for row and column directions
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* Container vs Item: display: flex, justify-content, align-items are container properties
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- Lesson 2 (Flex Advanced):
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* Explanation of flex shorthand (flex-grow, flex-shrink, flex-basis) and flex-wrap
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* Detailed diagram showing how flex: 1 1 100px works with space distribution
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* Visual comparison of wrapping vs non-wrapping behavior in narrow containers
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* Common flex patterns: flex: 1, flex: auto, flex: none, flex: 1 1 100px
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* Container vs Item: flex-wrap is container property, flex shorthand is item property
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- Lesson 3 (Grid Basics):
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* Explanation of CSS Grid as two-dimensional layout system with rows AND columns
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* Diagram comparing Flexbox (1D) vs Grid (2D) layout capabilities
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* Visual breakdown of fr units and gap spacing calculations
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* Examples of different fr ratios (1fr 2fr 1fr)
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* Guidance on when to use Grid vs Flexbox for different scenarios
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* Container vs Item: display: grid, grid-template-columns, gap are container properties
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- Lesson 4 (Grid Placement):
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* Explanation of grid line numbering system (lines run between cells, not through them)
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* Diagram showing line-based placement and spanning with grid-column: 1 / span 2
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* Visual examples of complex spanning layouts (header, sidebar spanning multiple rows)
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* Span syntax variations: start/span, start/end, auto-placement
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* Benefits of line-based placement over absolute positioning
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* Container vs Item: grid-column and grid-row are item properties for placement
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- All explanations are beginner-friendly (2-4 sentences)
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- Detailed ASCII diagrams illustrate layout systems, axis concepts, grid lines, and when to choose each approach
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- Focus on WHY to choose Flexbox (1D layouts) vs Grid (2D layouts) for different use cases
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- Real-world examples: navigation bars, card grids, page layouts, featured items
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- All concepts include containerVsItem distinctions for clarity
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Committed: a7f0761
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Status: ✓ Completed
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