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- Flawless theme-adaptive implementation with proper Okabe-Ito palette and chrome
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colors
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- Clean, readable code with linear flow and no over-engineering
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- No overlapping elements with excellent canvas utilization
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- Proper semantic coloring by outcome, class, sex, and age categories
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- Both light and dark renders display correctly with proper text legibility in both
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themes
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weaknesses:
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- 'Design Excellence below optimal: fairly standard Sankey styling without distinctive
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visual polish (DE-01: 5/8)'
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- 'Data storytelling implicit rather than explicit; plot displays flows but doesn''t
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emphasize key insights (DE-03: 3/6)'
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- Right-side outcome labels (18px) are readable but could be slightly larger for
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maximum visibility at 4800×2700 resolution
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- Link opacity (0.6) in dark theme slightly reduces ribbon distinction; consider
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increasing to 0.75+ for better visibility
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image_description: |-
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Light render (plot-light.png):
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Background: Warm off-white (#FAF8F1) - correct for light theme
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Chrome: Title "Titanic Survival · parallel-categories-basic · highcharts · anyplot.ai" and subtitle "Passenger flow from Class → Sex → Age Group → Survival Outcome" clearly visible in dark text (28px and 22px). Dimension labels (Class, Sex, Age Group, Outcome) at bottom are dark and readable. All labels have dark text on light background. Node labels on left and right are small (18px) but readable.
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Data: Sankey diagram showing passenger flows through four categorical dimensions. Colors: blue for class nodes, purple/yellow for sex, light blue for age, green for Survived outcomes, orange for Died outcomes. Ribbon widths proportional to passenger counts. All ribbon flows clearly distinguishable.
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Legibility verdict: PASS - All text is readable against the light background with proper contrast.
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Dark render (plot-dark.png):
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Background: Warm near-black (#1A1A17) - correct for dark theme
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Chrome: Title and dimension labels now light-colored (F0EFE8) against dark background, maintaining excellent readability. Node labels are light and clear. No dark-on-dark text failures detected. Theme adaptation successful.
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Data: Ribbon colors remain identical to light render - blue, purple, yellow, light blue, green, orange - confirming theme-independent color handling. Ribbon opacity (0.6) combined with dark background makes some flows slightly less visually distinct than light render, but all elements remain visible and distinguishable. Green (#009E73) for Survived outcomes properly visible.
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Legibility verdict: PASS - All text is readable against dark background; no dark-on-dark failures; data colors correctly preserved across themes.
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criteria_checklist:
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visual_quality:
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score: 27
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max: 30
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items:
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- id: VQ-01
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name: Text Legibility
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score: 6
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max: 8
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passed: true
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comment: All fonts explicitly set (title 28px, labels 22px, data 18px). Readable
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in both themes. Right-side labels could be larger.
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- id: VQ-02
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name: No Overlap
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score: 6
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max: 6
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passed: true
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comment: No overlapping text; all labels fit within spaces and are fully readable.
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- id: VQ-03
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name: Element Visibility
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score: 5
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max: 6
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passed: true
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comment: 'Ribbon flows clear and width-proportional. Dark render: 0.6 opacity
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ribbons slightly less distinct but acceptable.'
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- id: VQ-04
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name: Color Accessibility
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score: 2
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max: 2
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passed: true
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comment: Okabe-Ito palette is colorblind-safe; good contrast between data
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and backgrounds.
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- id: VQ-05
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name: Layout & Canvas
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score: 4
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max: 4
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passed: true
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comment: 'Excellent utilization: plot fills ~65% with balanced margins (250/300/220/250).'
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- id: VQ-06
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name: Axis Labels & Title
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score: 2
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max: 2
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passed: true
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comment: Clear descriptive labels explaining data structure (Class, Sex, Age
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Group, Outcome).
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- id: VQ-07
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name: Palette Compliance
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score: 2
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max: 2
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passed: true
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comment: 'Okabe-Ito palette correct: green (#009E73) for Survived, orange
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(#D55E00) for Died, blue (#0072B2) for Class. Backgrounds correct (#FAF8F1
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light, #1A1A17 dark). Theme-adaptive text colors properly applied.'
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design_excellence:
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score: 12
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max: 20
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items:
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- id: DE-01
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name: Aesthetic Sophistication
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score: 5
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max: 8
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passed: false
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comment: Professional color mapping and margins, but fairly standard Sankey
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styling without distinctive visual polish.
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- id: DE-02
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name: Visual Refinement
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score: 4
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max: 6
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passed: false
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comment: 'Good: hidden spines, clean whitespace, text outline for definition.
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Could add more subtle polish.'
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- id: DE-03
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name: Data Storytelling
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score: 3
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max: 6
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passed: false
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comment: Flow visualization shows survival variation by class/sex/age. Outcome
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colors provide hierarchy. No explicit insight emphasis; primarily displays
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data without narrative focus.
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spec_compliance:
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score: 14
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max: 15
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items:
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- id: SC-01
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name: Plot Type
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score: 5
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max: 5
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passed: true
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comment: 'Correct: Sankey diagram is valid parallel categories visualization.'
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- id: SC-02
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name: Required Features
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score: 4
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max: 4
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passed: true
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comment: Ribbon widths proportional to counts, color by node type, reasonable
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category ordering.
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- id: SC-03
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name: Data Mapping
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score: 3
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max: 3
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passed: true
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comment: 'Dimensions correctly mapped: Class → Sex → Age Group → Outcome.
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All data visible.'
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- id: SC-04
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name: Title & Legend
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score: 2
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max: 3
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passed: false
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comment: Title includes descriptive context before spec-id (slightly extended
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from strict format). Legend appropriately hidden.
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data_quality:
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score: 15
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max: 15
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items:
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- id: DQ-01
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name: Feature Coverage
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score: 6
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max: 6
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passed: true
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comment: 'Shows all aspects: three classes, both sexes, age variation, dual
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outcomes with varying survival rates.'
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- id: DQ-02
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name: Realistic Context
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score: 5
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max: 5
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passed: true
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comment: Titanic is real, well-known historical event with authentic passenger
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