margin: 10px 0px;
}
-body#user-index table#teachers,
-body#user-index table#students {
+body#user-index table#participants {
margin: auto;
width: 80%;
}
-body#user-index table#teachers td,
-body#user-index table#teachers th,
-body#user-index table#students td,
-body#user-index table#students th {
+
+body#user-index table#participants td,
+body#user-index table#participants th {
vertical-align: middle;
text-align: left;
padding: 4px;