CSS changes to the API reference (#5609)

CSS changes to the API reference

doc/en/_templates/globaltoc.html

@@ -4,7 +4,7 @@
   <li><a href="{{ pathto('index') }}">Home</a></li>
   <li><a href="{{ pathto('getting-started') }}">Install</a></li>
   <li><a href="{{ pathto('contents') }}">Contents</a></li>
-  <li><a href="{{ pathto('reference') }}">Reference</a></li>
+  <li><a href="{{ pathto('reference') }}">API Reference</a></li>
   <li><a href="{{ pathto('example/index') }}">Examples</a></li>
   <li><a href="{{ pathto('customize') }}">Customize</a></li>
   <li><a href="{{ pathto('changelog') }}">Changelog</a></li>

doc/en/_themes/flask/static/flasky.css_t

@@ -424,12 +424,56 @@ a:hover tt {
     background: #EEE;
 }
 
+#reference div.section h2 {
+    /* separate code elements in the reference section */
+    border-top: 2px solid #ccc;
+    padding-top: 0.5em;
+}
+
 #reference div.section h3 {
     /* separate code elements in the reference section */
     border-top: 1px solid #ccc;
     padding-top: 0.5em;
 }
 
+dl.class, dl.function {
+    margin-top: 1em;
+    margin-bottom: 1em;
+}
+
+dl.class > dd {
+    border-left: 3px solid #ccc;
+    margin-left: 0px;
+    padding-left: 30px;
+}
+
+dl.field-list {
+    flex-direction: column;
+}
+
+dl.field-list dd {
+    padding-left: 4em;
+    border-left: 3px solid #ccc;
+    margin-bottom: 0.5em;
+}
+
+dl.field-list dd > ul {
+    list-style: none;
+    padding-left: 0px;
+}
+
+dl.field-list dd > ul > li li :first-child {
+    text-indent: 0;
+}
+
+dl.field-list dd > ul > li :first-child {
+    text-indent: -2em;
+    padding-left: 0px;
+}
+
+dl.field-list dd > p:first-child {
+    text-indent: -2em;
+}
 
 @media screen and (max-width: 870px) {
 

doc/en/reference.rst

@@ -1,5 +1,5 @@
-Reference
-=========
+API Reference
+=============
 
 This page contains the full reference to pytest's API.