fix: adjust h2 CSS styles to not mix with functions descriptions

Author: williamdes

src/Resources/themes/default/css/doctum.css

@@ -352,6 +352,13 @@ a abbr {
     margin: 0 0 20px 0;
 }
 
+.namespace-container > h2 {
+    background-color: #edf3fe;
+    padding: 4px 4px 4px 8px;
+    font-size: 25px;
+    margin: 20px 0;
+}
+
 @media (max-width: 991px) {
     .namespaces .namespace-container {
         margin-right: 0;
@@ -387,13 +394,14 @@ pre {
     border-radius: 3px;
 }
 
-h2 {
+#page-content > h2 {
     background-color: #edf3fe;
     padding: 4px 4px 4px 8px;
     font-size: 25px;
     margin: 20px 0;
 }
 
+
 /** Doc index **/
 
 dt {
@@ -429,14 +437,14 @@ dd {
     border-bottom: 1px solid #ccc;
 }
 
-.search-results h2 {
+.search-results > li > h2 {
     background: none;
     margin: 0;
     padding: 0;
     font-size: 18px;
 }
 
-.search-results h2 a {
+.search-results  > li > h2 > a {
     float: left;
     display: block;
     margin: 0 0 4px 0;