Fix css of variant and record comments

Signed-off-by: Paul-Elliot <[email protected]>

Author: panglesd

src/odoc/etc/odoc.css

@@ -451,11 +451,13 @@ div.odoc-spec,.odoc-include {
 
 .spec.type .record > .def-doc, .spec.type .variant > .def-doc {
   min-width:50%;
-  padding-left: 22px;
+  padding-left: 18px;
   margin-left: 10%;
   border-radius: 3px;
   flex-grow:1;
   border-left: 0.1em solid var(--spec-summary-border-color);
+  background: var(--main-background);
+  box-shadow: 2px 2px 4px lightgrey;
 }
 
 div.def {