add hf model card css

style.css

@@ -134,4 +134,16 @@ button.submit:hover {
   
 button.submit:active {
     background-color: #cb5677;
-}
+}
+
+.card {
+	max-width: 620px;
+	margin: 0 auto;
+	padding: 16px;
+	border: 1px solid lightgray;
+	border-radius: 16px;
+}
+
+.card p:last-child {
+	margin-bottom: 0;
+}