Add styles

doc/_static/breathe.css

+
+/* -- breathe specific styles ----------------------------------------------- */
+
+/* So enum value descriptions are displayed inline to the item */
+.breatheenumvalues li tt + p {
+	display: inline;
+}
+
+/* So parameter descriptions are displayed inline to the item */
+.breatheparameterlist li tt + p {
+	display: inline;
+}
+

doc/_static/cppformat.css

+.function dd, .class dd {
+  margin-left: 30px;
+}
+
+.public-func dd {
+  margin-left: 0px;
+}
+

doc/_templates/layout.html

 {% extends "!layout.html" %}
 
+{# Custom CSS overrides #}
+{% set bootswatch_css_custom = ['_static/cppformat.css'] %}
+
 {% block footer %}
 {{ super() }}
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