diff --git a/packages/docusaurus-theme-classic/src/theme/DocRoot/Layout/styles.module.css b/packages/docusaurus-theme-classic/src/theme/DocRoot/Layout/styles.module.css
index d80285c4c1c0..7366e6d504bb 100644
--- a/packages/docusaurus-theme-classic/src/theme/DocRoot/Layout/styles.module.css
+++ b/packages/docusaurus-theme-classic/src/theme/DocRoot/Layout/styles.module.css
@@ -12,4 +12,5 @@
 
 .docsWrapper {
   display: flex;
+  flex: 1 0 auto;
 }
diff --git a/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/CollapseButton/styles.module.css b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/CollapseButton/styles.module.css
index 44f11f21cc75..c5026e8bf154 100644
--- a/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/CollapseButton/styles.module.css
+++ b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/CollapseButton/styles.module.css
@@ -43,4 +43,5 @@
 
 .collapseSidebarButton {
   display: none;
+  margin: 0;
 }
diff --git a/packages/docusaurus-theme-classic/src/theme/Layout/styles.module.css b/packages/docusaurus-theme-classic/src/theme/Layout/styles.module.css
index b667fe7911e9..162cbd125744 100644
--- a/packages/docusaurus-theme-classic/src/theme/Layout/styles.module.css
+++ b/packages/docusaurus-theme-classic/src/theme/Layout/styles.module.css
@@ -12,6 +12,8 @@ body {
 
 .mainWrapper {
   flex: 1 0 auto;
+  display: flex;
+  flex-direction: column;
 }
 
 /* Docusaurus-specific utility class */