fix(markmap): follow article text color in screen modes

assets/scss/td/_content-components.scss

@@ -233,6 +233,16 @@
   --term-color-7: #5d7189;
 }
 
+// Markmap declares its text token on both the wrapper and the generated SVG.
+// Override both inside article content, with enough specificity to survive
+// the vendor stylesheet injected after ours. The body token follows live
+// mode/preset changes; keep the vendor's dark ink when printing on white.
+@media screen {
+  .td-content .markmap {
+    --markmap-text-color: var(--bs-body-color);
+  }
+}
+
 // Markmap highlights fenced code inside its nodes with highlight.js, whose
 // vendored `default.min.css` is a light-only theme with no dark counterpart --
 // unlike Swagger UI and DocSearch, which carry their own and only need the

bin/check-namespace.py

@@ -104,12 +104,15 @@
 }
 
 # Custom properties a third-party runtime reads from its own stylesheet: the
-# theme sets them to theme its player, so they cannot carry a --td- prefix.
+# theme sets them to theme its integrations, so they cannot carry a --td- prefix.
 # asciinema-player.css reads --term-* (palette, font, metrics); renaming them
 # leaves the player on its built-in black-on-white defaults inside an OINK
-# terminal surface, which is how the 0.5 sweep broke it.
+# terminal surface, which is how the 0.5 sweep broke it. Markmap reads its
+# --markmap-text-color token on the SVG; prefixing it leaves dark text on the
+# dark article canvas.
 THIRD_PARTY_PROPERTY = re.compile(
-    r"^--term-(color-(foreground|background|\d+)|font-family|line-height|cols|rows)$"
+    r"^--(?:term-(color-(foreground|background|\d+)|font-family|line-height|cols|rows)"
+    r"|markmap-text-color)$"
 )
 BEM_CLASS = re.compile(r"^[a-z][a-z0-9-]*(?:__|--)[a-z0-9_-]+$")
 PLAYER_THEME_RE = re.compile(

tests/js/markmap-theme-source.test.js

@@ -0,0 +1,23 @@
+'use strict';
+
+// Source contract only; rendered contrast and interactions belong to the
+// sibling documentation site's Markmap browser suite.
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const path = require('node:path');
+const test = require('node:test');
+
+const source = fs.readFileSync(
+  path.join(__dirname, '../../assets/scss/td/_content-components.scss'), 'utf8',
+).replace(/\/\*[\s\S]*?\*\/|\/\/[^\n]*/g, '');
+
+test('Markmap maps the article token on screen with wrapper/SVG specificity', () => {
+  assert.match(source,
+    /@media\s+screen\s*\{\s*\.td-content\s+\.markmap\s*\{\s*--markmap-text-color:\s*var\(--bs-body-color\);\s*\}\s*\}/,
+    'keep the mapping screen-only and applicable to both wrapper and SVG');
+});
+
+test('Markmap has no competing text-token assignment or important override', () => {
+  const declarations = source.match(/--markmap-text-color\s*:[^;]+;/g) || [];
+  assert.deepEqual(declarations, ['--markmap-text-color: var(--bs-body-color);']);
+});