diff --git a/src/assets/main.css b/src/assets/main.css
index d3b3279..79996a0 100644
--- a/src/assets/main.css
+++ b/src/assets/main.css
@@ -228,8 +228,12 @@ html.platform-macos #root {
 
 .ss-immersive-sidebar {
   --ss-sidebar-width: 200px;
+  height: 100%;
+  display: flex;
+  flex-shrink: 0;
   width: var(--ss-sidebar-width);
   overflow: hidden;
+  background: var(--ss-sidebar-bg);
   opacity: 1;
   transform: translateX(0);
   transition:
@@ -239,6 +243,10 @@ html.platform-macos #root {
   will-change: width, opacity, transform;
 }
 
+.ss-immersive-sidebar .ant-layout-sider {
+  height: 100% !important;
+}
+
 .ss-immersive-sidebar.is-hidden {
   width: 0;
   opacity: 0;