diff --git a/src/packages/tabs/src/tabs.css b/src/packages/tabs/src/tabs.css
index 34f154e13..dc4be74fa 100644
--- a/src/packages/tabs/src/tabs.css
+++ b/src/packages/tabs/src/tabs.css
@@ -21,6 +21,15 @@
   height: 24px;
 }
 
+.tab:first-child {
+  box-shadow: inset 0 0 5px #383838, 0 1px 0 #585858, inset -1px 0 0 #4a4a4a;
+}
+
+.tab.active:first-child,
+.tab.active:first-child:hover {
+  box-shadow: inset -1px 0 0 #595959;
+}
+
 .tab.active,
 .tab.active:hover {
   color: #dae6e6;
diff --git a/static/tree-view.css b/static/tree-view.css
index 94b1919e5..18751fad1 100644
--- a/static/tree-view.css
+++ b/static/tree-view.css
@@ -5,7 +5,7 @@
   overflow: auto;
   cursor: default;
   -webkit-user-select: none;
-  border-right: 1px solid #191919;
+  border-right: 2px solid #191919;
   min-width: 100px;
   z-index: 2;
   padding-left: 12px;