Doxygen Awesome style tweaks

Author: dmadison

docs/Doxyfile

@@ -1301,7 +1301,8 @@ HTML_STYLESHEET        =
 # list). For an example see the documentation.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_EXTRA_STYLESHEET  = doxygen-awesome-css/doxygen-awesome.css \
+HTML_EXTRA_STYLESHEET  = include/sim-racing-docs.css \
+                         doxygen-awesome-css/doxygen-awesome.css \
                          doxygen-awesome-css/doxygen-awesome-sidebar-only.css \
                          doxygen-awesome-css/doxygen-awesome-sidebar-only-darkmode-toggle.css
 
@@ -1642,7 +1643,7 @@ ENUM_VALUES_PER_LINE   = 4
 # Minimum value: 0, maximum value: 1500, default value: 250.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-TREEVIEW_WIDTH         = 250
+TREEVIEW_WIDTH         = 350
 
 # If the EXT_LINKS_IN_WINDOW option is set to YES, doxygen will open links to
 # external symbols imported via tag files in a separate window.

docs/include/sim-racing-docs.css

@@ -0,0 +1,21 @@
+/**
+Sim Racing Arduino Library - Doxygen Stylesheet
+https://github.com/dmadison/Sim-Racing-Arduino/
+
+For use with Doxygen Awesome theme
+*/
+
+/* Custom side nav width */
+html {
+    /* side nav width. MUST be = `TREEVIEW_WIDTH`.
+     * Make sure it is wide enough to contain the page title (logo + title + version)
+     */
+    --side-nav-fixed-width: 350px !important;
+}
+
+/* Move project number to its own line */
+#projectnumber{
+    display:block;
+    position: relative;
+    left: -0.3em;
+}