diff -r 645786bb8587 -r 36f84e8f1ad5 cms/app-client/app/styles/tabs/langues.scss
--- a/cms/app-client/app/styles/tabs/langues.scss	Fri Jan 15 15:48:42 2016 +0100
+++ b/cms/app-client/app/styles/tabs/langues.scss	Fri Jan 15 15:49:42 2016 +0100
@@ -1,4 +1,45 @@
-#chart_div{
+#chart_div {
   width: 560px;
   height: 540px;
+  background: #ddd;
 }
+
+text {
+  pointer-events: none;
+}
+
+.grandparent text {
+  font-weight: bold;
+}
+
+rect {
+  /*fill: none;*/
+  stroke: #fff;
+}
+
+rect.parent,
+.grandparent rect {
+  stroke-width: 2px;
+}
+
+.grandparent rect {
+  fill: green;
+}
+
+.grandparent:hover rect {
+  fill: lightgreen;
+}
+
+.children rect.parent,
+.grandparent rect {
+  cursor: pointer;
+}
+
+.children rect.parent {
+  /*fill: #bbb;*/
+  fill-opacity: .5;
+}
+
+.children:hover rect.child {
+  /*fill: #bbb;*/
+}