Minor documentation tweak.

Author: bnbailey-psl

docs/DoxygenLayout.xml

@@ -29,9 +29,9 @@
       <tab type="user" visible="yes" url="@ref WeberPennTreeDoc" title="Weber-Penn Tree"/>
     </tab>
 
-    <!-- API Reference -->
-    <tab type="classes" visible="yes" title="Classes"/>
-    <tab type="files" visible="yes" title="Files"/>
+    <!-- API Reference - Temporarily disabled due to indentation issues -->
+    <tab type="classes" visible="no" title="Classes"/>
+    <tab type="files" visible="no" title="Files"/>
 
     <!-- Search functionality -->
     <tab type="search" visible="yes" title=""/>

docs/assets/pyhelios-custom.css

@@ -22,66 +22,18 @@
     background: var(--page-background-color) !important;
 }
 
-/* Fix navigation tree indentation issues for Classes and Files */
+/* Clean navigation styling - Classes and Files tabs have been disabled */
 #nav-tree .item {
     margin-left: 0 !important;
     padding-left: 0 !important;
 }
 
-/* Ensure all navigation items at root level have same indentation */
+/* Ensure consistent indentation for all navigation items */
 #nav-tree > .children > .item {
     margin-left: 0 !important;
     padding-left: 0 !important;
 }
 
-/* Target specific items that may be indented incorrectly */
-#nav-tree .item[id*="annotated"],
-#nav-tree .item[id*="files"],
-#nav-tree a[href="annotated.html"],
-#nav-tree a[href="files.html"] {
-    margin-left: 0 !important;
-    padding-left: 0 !important;
-}
-
-/* Reset any nested indentation for navigation links */
-#nav-tree ul {
-    margin-left: 0 !important;
-    padding-left: 0 !important;
-}
-
-#nav-tree li {
-    margin-left: 0 !important;
-    padding-left: 0 !important;
-}
-
-/* Ensure consistent indentation for all top-level nav items */
-#nav-tree .children .item {
-    margin-left: 0 !important;
-    text-indent: 0 !important;
-}
-
-/* Override any theme-specific indentation */
-.doxygen-awesome-sidebar-only #nav-tree .item {
-    margin-left: 0 !important;
-    padding-left: 0 !important;
-}
-
-/* Debug: Add visual indicators to identify navigation structure issues */
-#nav-tree .item:has(a[href="annotated.html"]),
-#nav-tree .item:has(a[href="files.html"]) {
-    border-left: 2px solid red !important;
-    background-color: rgba(255, 0, 0, 0.1) !important;
-}
-
-/* Alternative approach - directly target the text content */
-#nav-tree a[href="annotated.html"]:before {
-    content: "🔍 ";
-}
-
-#nav-tree a[href="files.html"]:before {
-    content: "📁 ";
-}
-
 /* Ensure consistent header styling */
 #projectname {
     color: var(--page-foreground-color);