diff --git a/docs/assets/css/docs.css b/docs/assets/css/docs.css
index 06f94fd2e3..5bf99208b9 100644
--- a/docs/assets/css/docs.css
+++ b/docs/assets/css/docs.css
@@ -206,6 +206,81 @@ section > ul li {
 
 
 
+/* Responsive docs
+-------------------------------------------------- */
+
+/* Related: responsive utilities tables */
+.table code {
+  font-size: 13px;
+  font-weight: normal;
+}
+
+/* Utility classes table
+------------------------- */
+.responsive-utilities th small {
+  display: block;
+  font-weight: normal;
+  color: #999;
+}
+.responsive-utilities tbody th {
+  font-weight: normal;
+}
+.responsive-utilities td {
+  text-align: center;
+}
+.responsive-utilities td.is-visible {
+  color: #468847;
+  background-color: #dff0d8 !important;
+}
+.responsive-utilities td.is-hidden {
+  color: #ccc;
+  background-color: #f9f9f9 !important;
+}
+
+/* Responsive tests
+------------------------- */
+.responsive-utilities-test {
+  margin-top: 5px;
+  margin-left: 0;
+  list-style: none;
+  overflow: hidden; /* clear floats */
+}
+.responsive-utilities-test li {
+  position: relative;
+  float: left;
+  width: 25%;
+  height: 43px;
+  font-size: 14px;
+  font-weight: bold;
+  line-height: 43px;
+  color: #999;
+  text-align: center;
+  border: 1px solid #ddd;
+  -webkit-border-radius: 4px;
+     -moz-border-radius: 4px;
+          border-radius: 4px;
+}
+.responsive-utilities-test li + li {
+  margin-left: 10px;
+}
+.responsive-utilities-test span {
+  position: absolute;
+  top:    -1px;
+  left:   -1px;
+  right:  -1px;
+  bottom: -1px;
+  -webkit-border-radius: 4px;
+     -moz-border-radius: 4px;
+          border-radius: 4px;
+}
+.responsive-utilities-test span {
+  color: #468847;
+  background-color: #dff0d8;
+  border: 1px solid #d6e9c6;
+}
+
+
+
 /* Footer
 -------------------------------------------------- */