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- Full theme adaptation works correctly in both light and dark renders — no dark-on-dark
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or light-on-light failures
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- Pacific Northwest rainfall data is realistic, neutral, and naturally cyclical
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— ideal for a rose chart
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- Code is clean, deterministic, and follows pygal idioms; the sys.path workaround
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is handled correctly
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- Both PNG and HTML outputs generated as required for an interactive library
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- 'Color palette compliance is correct: #009E73 as the single series color'
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weaknesses:
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- Uses pygal.Radar (continuous polygon) instead of a true rose/coxcomb chart with
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distinct wedge segments — visually this is a radar/spider chart, not individual
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petals
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- Legend is cramped in the lower-left corner with no padding from the chart boundary
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- No radial axis label indicating the unit (mm) on the ring scale
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- Summer months (Jun–Aug) with values near 0 produce a near-collapsed area indistinguishable
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from the center
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- Design is generic — no emphasis on peak/trough months, no storytelling about the
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seasonal pattern
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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
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Chrome: Title "rose-basic · pygal · anyplot.ai" in dark ink — readable. Month labels (Jan–Dec) around perimeter in dark text — readable. Radial value labels (0, 40, 80, 120, 160) visible. Legend "Monthly Rainfall (mm)" at bottom-left in dark text — readable.
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Data: Filled green (#009E73) polygon — prominent in upper half (winter months), contracting near center for summer months. Opacity 0.75 gives subtle transparency.
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Legibility verdict: PASS
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Dark render (plot-dark.png):
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Background: Near-black #1A1A17 — correct
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Chrome: Title in light text — readable. Month labels in light gray — readable. Radial value labels in lighter tone — visible. Legend text is light — readable. No dark-on-dark failures observed.
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Data: Filled green (#009E73) polygon — identical colors to light render. Shape and proportions unchanged between themes.
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Legibility verdict: PASS
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criteria_checklist:
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visual_quality:
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score: 24
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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: Readable in both themes; inner radial value labels smaller than outer
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month labels
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- id: VQ-02
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name: No Overlap
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score: 5
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max: 6
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passed: true
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comment: No collisions; May label slightly rotated but 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: Filled polygon visible; summer months contract close to zero
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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: Single brand-green series, CVD-safe
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- id: VQ-05
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name: Layout & Canvas
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score: 3
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max: 4
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passed: true
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comment: Square canvas appropriate; legend cramped in lower-left
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- id: VQ-06
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name: Axis Labels & Title
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score: 1
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max: 2
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passed: false
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comment: Title correct; no radial axis unit label
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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: 'Backgrounds correct, #009E73 first series, identical data colors
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between themes'
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design_excellence:
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score: 8
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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: 4
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max: 8
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passed: false
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comment: Generic pygal defaults, opacity adds minor depth, no design hierarchy
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