feat(pygal): implement line-multi

plots/line-multi/implementations/python/pygal.py

@@ -1,13 +1,38 @@
-""" pyplots.ai
+""" anyplot.ai
 line-multi: Multi-Line Comparison Plot
-Library: pygal 3.1.0 | Python 3.13.11
-Quality: 91/100 | Created: 2025-12-24
+Library: pygal 3.1.0 | Python 3.13.13
+Quality: 83/100 | Updated: 2026-05-06
 """
 
-import pygal
-from pygal.style import Style
+import os
+import sys
+from pathlib import Path
 
 
+# Remove the script's directory from sys.path to avoid import collision
+script_dir = str(Path(__file__).parent)
+sys.path = [p for p in sys.path if p != script_dir and p != ""]
+
+import pygal  # noqa: E402
+from pygal.style import Style  # noqa: E402
+
+
+# Theme tokens (see prompts/default-style-guide.md)
+THEME = os.getenv("ANYPLOT_THEME", "light")
+PAGE_BG = "#FAF8F1" if THEME == "light" else "#1A1A17"
+ELEVATED_BG = "#FFFDF6" if THEME == "light" else "#242420"
+INK = "#1A1A17" if THEME == "light" else "#F0EFE8"
+INK_SOFT = "#4A4A44" if THEME == "light" else "#B8B7B0"
+INK_MUTED = "#6B6A63" if THEME == "light" else "#A8A79F"
+
+# Okabe-Ito palette (canonical order)
+OKABE_ITO = (
+    "#009E73",  # bluish green (brand — first series)
+    "#D55E00",  # vermillion
+    "#0072B2",  # blue
+    "#CC79A7",  # reddish purple
+)
+
 # Data - Monthly sales for 4 product lines over 12 months
 months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
 
@@ -16,44 +41,41 @@
 home_goods = [28, 31, 35, 38, 42, 45, 48, 52, 49, 55, 62, 72]
 sports = [22, 25, 32, 45, 58, 65, 72, 68, 55, 42, 35, 28]
 
-# Custom style for large canvas
+# Custom style with theme-adaptive colors
 custom_style = Style(
-    background="white",
-    plot_background="white",
-    foreground="#333333",
-    foreground_strong="#333333",
-    foreground_subtle="#666666",
-    colors=("#306998", "#FFD43B", "#E85D04", "#2A9D8F"),  # Python colors + colorblind-safe
-    title_font_size=72,
-    label_font_size=48,
-    major_label_font_size=42,
-    legend_font_size=42,
-    value_font_size=36,
-    stroke_width=8,
-    opacity=0.9,
-    opacity_hover=1.0,
+    background=PAGE_BG,
+    plot_background=PAGE_BG,
+    foreground=INK,
+    foreground_strong=INK,
+    foreground_subtle=INK_MUTED,
+    colors=OKABE_ITO,
+    title_font_size=28,
+    label_font_size=22,
+    major_label_font_size=18,
+    legend_font_size=16,
+    value_font_size=14,
+    stroke_width=3,
 )
 
 # Create chart
 chart = pygal.Line(
     width=4800,
     height=2700,
-    title="line-multi \u00b7 pygal \u00b7 pyplots.ai",
+    title="line-multi · pygal · anyplot.ai",
     x_title="Month",
     y_title="Sales (thousands USD)",
     style=custom_style,
     show_dots=True,
-    dots_size=12,
+    dots_size=6,
     show_legend=True,
     legend_at_bottom=False,
-    legend_box_size=36,
     x_label_rotation=0,
     show_y_guides=True,
     show_x_guides=False,
-    margin=80,
-    margin_top=150,
-    margin_bottom=150,
-    spacing=40,
+    margin=100,
+    margin_top=120,
+    margin_bottom=100,
+    spacing=20,
 )
 
 # Add data series
@@ -64,5 +86,6 @@
 chart.add("Sports", sports)
 
 # Save as PNG and HTML
-chart.render_to_png("plot.png")
-chart.render_to_file("plot.html")
+chart.render_to_png(f"plot-{THEME}.png")
+with open(f"plot-{THEME}.html", "wb") as f:
+    f.write(chart.render())