diff --git a/package.json b/package.json
index 11fcc69..923d801 100644
--- a/package.json
+++ b/package.json
@@ -6,8 +6,10 @@
   "scripts": {
     "dev": "vite",
     "build": "vite build",
-    "lint": "eslint .",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "lint": "eslint 'src/**/*.js'",
+    "lint-diff": "eslint $(git diff --name-only --diff-filter=duxb origin/$BASE origin/$HEAD | grep -E '\\.((j|t)sx?)$' | xargs)"
+
   },
   "dependencies": {
     "@emotion/react": "^11.13.3",
diff --git a/src/App.jsx b/src/App.jsx
index 11813cf..58754aa 100644
--- a/src/App.jsx
+++ b/src/App.jsx
@@ -11,6 +11,8 @@ function App() {
   return (
     <ThemeProvider theme={theme}>
       <BrowserRouter>
+      {/*<NavBar />*/}
+      <div className="main-content">
         <Routes>
           <Route path="/" element={<MakingGroupPage />} />
           <Route path="/makingGroup" element={<MakingGroupPage />} />
@@ -22,6 +24,7 @@ function App() {
             element={<AnotherCheckPointRecordPage />}
           />
         </Routes>
+        </div>
       </BrowserRouter>
     </ThemeProvider>
   );
diff --git a/src/index.css b/src/index.css
index 08c4902..afc29e2 100644
--- a/src/index.css
+++ b/src/index.css
@@ -1,70 +1,29 @@
-:root {
-  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
-  line-height: 1.5;
-  font-weight: 400;
-
-  color-scheme: light dark;
-  color: rgba(255, 255, 255, 0.87);
-  background-color: #242424;
-
-  font-synthesis: none;
-  text-rendering: optimizeLegibility;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-}
-
-a {
-  font-weight: 500;
-  color: #646cff;
-  text-decoration: inherit;
-}
-a:hover {
-  color: #535bf2;
-}
 
 body {
-  margin: 0;
-  display: flex;
-  place-items: center;
-  align-items: center;
-  justify-content: center;
-  min-width: 320px;
+  color: black; 
+  margin: 0; 
+  padding: 0;
   min-height: 100vh;
+  display: flex;
+  flex-direction: column;
+  position: relative;
 }
 
-h1 {
-  font-size: 3.2em;
-  line-height: 1.1;
+.navbar {
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  z-index: 10;
+  height: 80px;
 }
 
-button {
-  border-radius: 8px;
-  border: 1px solid transparent;
-  padding: 0.6em 1.2em;
-  font-size: 1em;
-  font-weight: 500;
-  font-family: inherit;
-  background-color: #1a1a1a;
-  cursor: pointer;
-  transition: border-color 0.25s;
-}
-button:hover {
-  border-color: #646cff;
-}
-button:focus,
-button:focus-visible {
-  outline: 4px auto -webkit-focus-ring-color;
+.main-content {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  position: relative;
+  width: 100%;
+  height: calc(100vh - 80px);
 }
 
-@media (prefers-color-scheme: light) {
-  :root {
-    color: #213547;
-    background-color: #ffffff;
-  }
-  a:hover {
-    color: #747bff;
-  }
-  button {
-    background-color: #f9f9f9;
-  }
-}