added missing instructions
diff --git a/style_atl.css b/style_atl.css
index edcb3d2..38af331 100644
--- a/style_atl.css
+++ b/style_atl.css
@@ -216,4 +216,21 @@
 
 a strong {
 	text-decoration: underline;
-}
\ No newline at end of file
+}
+
+
+#obeo a {
+	display: block;
+	padding: 0;
+	margin-top: 10px;
+	margin-left: auto;
+	margin-right: auto;
+}
+
+#obeo img {
+	display: block;
+	width: 117px;
+	height: 60px;
+	margin-left: auto;
+	margin-right: auto;
+}