--

src/pages/main.tsx

@@ -21,7 +21,8 @@ export default function Main () {
                         width: '100%',
                         padding: '25px',
                         height: 'calc(100vh - 80px)',
-                        overflow: 'auto'
+                        overflow: 'auto',
+                        boxSizing: "border-box"
                     }}
                 >
                     <Outlet />

src/ui_kit/Sidebar.tsx

@@ -52,6 +52,7 @@ export default function Sidebar() {
                     transitionDuration: "200ms",
                     overflow: "hidden",
                     whiteSpace: "nowrap",
+                    boxSizing: "border-box"
                 }}
             >
                 <Box