diff --git a/src/client/app.scss b/src/client/app.scss
index 018c211..944d658 100644
--- a/src/client/app.scss
+++ b/src/client/app.scss
@@ -7,15 +7,19 @@
   position: relative;
   width: 100%;
   height: 100%;
-  &.horizontal .pane {
+  &.horizontal > .pane {
     float: left;
     height: 100%;
   }
-  &.vertical .pane {
+  &.vertical > .pane {
     width: 100%;
   }
 }
 
+.app > .panes.vertical > .panes.horizontal {
+  height: calc(100% - 2.5em);
+}
+
 .sidebar-icons-wrapper {
   width: 4em;
 }