diff --git a/doc/assets/style.css b/doc/assets/style.css
index 09bc9a364..95034c90a 100644
--- a/doc/assets/style.css
+++ b/doc/assets/style.css
@@ -44,4 +44,19 @@ a:hover {
   display: block;
   overflow: auto;
   padding: 5px;
-}
\ No newline at end of file
+}
+
+table, th, td {
+  text-align: left;
+  border: 1px solid gray;
+  border-collapse: collapse;
+}
+
+th {
+  padding: 0.5em;
+  background: #EEE;
+}
+
+td {
+  padding: 0.5em;
+}