docs: fix the header logo fill and align theme font weights

The logo SVG carried fill="none" only on the root element; Material's
.md-logo svg { fill: currentcolor } rule overrides a root presentation
attribute, so the three open stroke paths rendered as a solid filled shape.
Declaring fill="none" on each path wins over the inherited CSS value.

Font weights move from 600 to 700: the theme's Google Fonts request only
loads Inter at 300/400/700, so 600 was already substituting the 700 face
with the webfont while rendering a lighter true-600 on the system fallback
stack. The ltr/rtl rule pairs collapse into margin-inline-start and
border-inline-start, which tie Material's physical outdent at equal
specificity and win on source order.

Cap mkdocs-material below 10: extra.css deliberately overrides
theme-internal nav selectors, so a major bump should revisit it.

Author: maxisbey

docs/.overrides/.icons/mcp.svg

@@ -16,26 +16,20 @@
   }
 
   /* Indent section children and hang a guide line. Material outdents section
-     children with margin-left: -0.6rem, which is why they sit flush under the
-     header; restoring the margin re-exposes the stock 0.6rem list padding. */
-  [dir="ltr"] .md-sidebar--primary .md-nav__item--section > .md-nav {
-    margin-left: 0.1rem;
-    border-left: 0.05rem solid var(--md-default-fg-color--lightest);
-  }
-  [dir="rtl"] .md-sidebar--primary .md-nav__item--section > .md-nav {
-    margin-right: 0.1rem;
-    border-right: 0.05rem solid var(--md-default-fg-color--lightest);
+     children with [dir=ltr] ... margin-left: -0.6rem, which is why they sit
+     flush under the header; restoring the margin re-exposes the stock 0.6rem
+     list padding. The logical property ties Material's physical one at
+     (0,3,0) specificity and wins on source order (extra_css loads last),
+     while staying direction-agnostic. */
+  .md-sidebar--primary .md-nav__item--section > .md-nav {
+    margin-inline-start: 0.1rem;
+    border-inline-start: 0.05rem solid var(--md-default-fg-color--lightest);
   }
 
   /* Same guide line for collapsible groups inside the API Reference subtree
      (section items also carry --nested, so exclude them). */
-  [dir="ltr"] .md-sidebar--primary
-    .md-nav__item--nested:not(.md-nav__item--section) > .md-nav {
-    border-left: 0.05rem solid var(--md-default-fg-color--lightest);
-  }
-  [dir="rtl"] .md-sidebar--primary
-    .md-nav__item--nested:not(.md-nav__item--section) > .md-nav {
-    border-right: 0.05rem solid var(--md-default-fg-color--lightest);
+  .md-sidebar--primary .md-nav__item--nested:not(.md-nav__item--section) > .md-nav {
+    border-inline-start: 0.05rem solid var(--md-default-fg-color--lightest);
   }
 
   /* Tighten vertical rhythm (stock: 0.625em link margins, 1.25em sections).
@@ -51,9 +45,11 @@
     margin-top: 0;
   }
 
-  /* The current page stands out from its siblings. */
+  /* The current page stands out from its siblings. 700 because Material only
+     loads Inter at 300/400/700; a 600 would silently substitute the 700 face
+     anyway, but render lighter on the system-font fallback stack. */
   .md-sidebar--primary .md-nav__link--active {
-    font-weight: 600;
+    font-weight: 700;
   }
 
   /* The sidebar repeats the site name right above the homepage nav entry;
@@ -65,12 +61,14 @@
 }
 
 /* Headings: Material's 300-weight light-gray defaults read washed out; use
-   the full foreground color and a solid weight instead. */
+   the full foreground color and a solid weight instead. 700, not 600: the
+   Google Fonts request only carries Inter 300/400/700 (see the nav__link
+   note above). */
 .md-typeset h1,
 .md-typeset h2 {
-  font-weight: 600;
+  font-weight: 700;
   color: var(--md-default-fg-color);
 }
 .md-typeset h3 {
-  font-weight: 600;
+  font-weight: 700;
 }

docs/extra.css

@@ -80,7 +80,9 @@ docs = [
     "mkdocs-gen-files>=0.5.0",
     "mkdocs-glightbox>=0.4.0",
     "mkdocs-literate-nav>=0.6.1",
-    "mkdocs-material[imaging]>=9.7.0",
+    # docs/extra.css overrides Material-internal nav selectors; revisit it on a
+    # major bump before raising this cap.
+    "mkdocs-material[imaging]>=9.7.0,<10",
     "mkdocstrings-python>=2.0.1",
 ]
 codegen = ["datamodel-code-generator==0.57.0"]