diff --git a/src/index.css b/src/index.css
index 4468af33..e243a7aa 100644
--- a/src/index.css
+++ b/src/index.css
@@ -216,7 +216,7 @@ body {
   display: flex;
   align-items: flex-start;
   justify-content: flex-start;
-  padding: 0.5rem 0.5rem 0 0.5rem;
+  padding: 0.5rem 0 0 0.5rem;
   background: transparent;
   border: none;
 }
@@ -505,6 +505,15 @@ body {
   contain: layout style;
 }
 
+/* Remove padding when sidebar is collapsed for zero gap */
+.three-pane.sidebar-collapsed .pane.main {
+  padding-left: 0;
+}
+
+.three-pane.sidebar-collapsed.highlights-collapsed .pane.main {
+  padding-left: 0;
+}
+
 .pane.highlights {
   overflow-y: auto;
   height: 100%;