diff --git a/apps/as/app/auth/login/page.tsx b/apps/as/app/(auth)/auth/login/page.tsx
similarity index 100%
rename from apps/as/app/auth/login/page.tsx
rename to apps/as/app/(auth)/auth/login/page.tsx
diff --git a/apps/as/app/(auth)/layout.tsx b/apps/as/app/(auth)/layout.tsx
new file mode 100644
index 000000000..ab5b6f26f
--- /dev/null
+++ b/apps/as/app/(auth)/layout.tsx
@@ -0,0 +1,13 @@
+import "@/app/styles/globals.css";
+
+export const metadata = {
+  title: "행정지원시스템",
+};
+
+export default function AuthLayout({ children }: { children: React.ReactNode }) {
+  return (
+    <html lang="ko">
+      <body>{children}</body>
+    </html>
+  );
+}
diff --git a/apps/as/app/(with-base-layout)/approval-line-management/page.tsx b/apps/as/app/(main)/(with-base-layout)/approval-line-management/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/approval-line-management/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/approval-line-management/page.tsx
diff --git a/apps/as/app/(with-base-layout)/checklist-management/page.tsx b/apps/as/app/(main)/(with-base-layout)/checklist-management/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/checklist-management/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/checklist-management/page.tsx
diff --git a/apps/as/app/(with-base-layout)/code-management/page.tsx b/apps/as/app/(main)/(with-base-layout)/code-management/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/code-management/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/code-management/page.tsx
diff --git a/apps/as/app/(with-base-layout)/design-cnstn/[id]/edit/page.tsx b/apps/as/app/(main)/(with-base-layout)/design-cnstn/[id]/edit/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/design-cnstn/[id]/edit/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/design-cnstn/[id]/edit/page.tsx
diff --git a/apps/as/app/(with-base-layout)/design-cnstn/[id]/page.tsx b/apps/as/app/(main)/(with-base-layout)/design-cnstn/[id]/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/design-cnstn/[id]/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/design-cnstn/[id]/page.tsx
diff --git a/apps/as/app/(with-base-layout)/design-cnstn/page.tsx b/apps/as/app/(main)/(with-base-layout)/design-cnstn/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/design-cnstn/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/design-cnstn/page.tsx
diff --git a/apps/as/app/(with-base-layout)/design-cnstn/regist/page.tsx b/apps/as/app/(main)/(with-base-layout)/design-cnstn/regist/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/design-cnstn/regist/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/design-cnstn/regist/page.tsx
diff --git a/apps/as/app/(with-base-layout)/esntl-atch-file-mng/page.tsx b/apps/as/app/(main)/(with-base-layout)/esntl-atch-file-mng/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/esntl-atch-file-mng/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/esntl-atch-file-mng/page.tsx
diff --git a/apps/as/app/(with-base-layout)/fnrs-cnsltn/[id]/edit/page.tsx b/apps/as/app/(main)/(with-base-layout)/fnrs-cnsltn/[id]/edit/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/fnrs-cnsltn/[id]/edit/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/fnrs-cnsltn/[id]/edit/page.tsx
diff --git a/apps/as/app/(with-base-layout)/fnrs-cnsltn/[id]/page.tsx b/apps/as/app/(main)/(with-base-layout)/fnrs-cnsltn/[id]/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/fnrs-cnsltn/[id]/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/fnrs-cnsltn/[id]/page.tsx
diff --git a/apps/as/app/(with-base-layout)/fnrs-cnsltn/page.tsx b/apps/as/app/(main)/(with-base-layout)/fnrs-cnsltn/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/fnrs-cnsltn/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/fnrs-cnsltn/page.tsx
diff --git a/apps/as/app/(with-base-layout)/fnrs-cnsltn/regist/page.tsx b/apps/as/app/(main)/(with-base-layout)/fnrs-cnsltn/regist/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/fnrs-cnsltn/regist/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/fnrs-cnsltn/regist/page.tsx
diff --git a/apps/as/app/(with-base-layout)/instl-sncn/[id]/edit/page.tsx b/apps/as/app/(main)/(with-base-layout)/instl-sncn/[id]/edit/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/instl-sncn/[id]/edit/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/instl-sncn/[id]/edit/page.tsx
diff --git a/apps/as/app/(with-base-layout)/instl-sncn/[id]/page.tsx b/apps/as/app/(main)/(with-base-layout)/instl-sncn/[id]/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/instl-sncn/[id]/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/instl-sncn/[id]/page.tsx
diff --git a/apps/as/app/(with-base-layout)/instl-sncn/page.tsx b/apps/as/app/(main)/(with-base-layout)/instl-sncn/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/instl-sncn/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/instl-sncn/page.tsx
diff --git a/apps/as/app/(with-base-layout)/instl-sncn/regist/page.tsx b/apps/as/app/(main)/(with-base-layout)/instl-sncn/regist/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/instl-sncn/regist/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/instl-sncn/regist/page.tsx
diff --git a/apps/as/app/(with-base-layout)/layout.tsx b/apps/as/app/(main)/(with-base-layout)/layout.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/layout.tsx
rename to apps/as/app/(main)/(with-base-layout)/layout.tsx
diff --git a/apps/as/app/(with-base-layout)/page.tsx b/apps/as/app/(main)/(with-base-layout)/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/page.tsx
diff --git a/apps/as/app/(with-base-layout)/rvw-mnpw-mng/page.tsx b/apps/as/app/(main)/(with-base-layout)/rvw-mnpw-mng/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/rvw-mnpw-mng/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/rvw-mnpw-mng/page.tsx
diff --git a/apps/as/app/(with-base-layout)/sewer-bsc-plan/[id]/edit/page.tsx b/apps/as/app/(main)/(with-base-layout)/sewer-bsc-plan/[id]/edit/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/sewer-bsc-plan/[id]/edit/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/sewer-bsc-plan/[id]/edit/page.tsx
diff --git a/apps/as/app/(with-base-layout)/sewer-bsc-plan/[id]/page.tsx b/apps/as/app/(main)/(with-base-layout)/sewer-bsc-plan/[id]/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/sewer-bsc-plan/[id]/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/sewer-bsc-plan/[id]/page.tsx
diff --git a/apps/as/app/(with-base-layout)/sewer-bsc-plan/page.tsx b/apps/as/app/(main)/(with-base-layout)/sewer-bsc-plan/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/sewer-bsc-plan/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/sewer-bsc-plan/page.tsx
diff --git a/apps/as/app/(with-base-layout)/sewer-bsc-plan/regist/page.tsx b/apps/as/app/(main)/(with-base-layout)/sewer-bsc-plan/regist/page.tsx
similarity index 100%
rename from apps/as/app/(with-base-layout)/sewer-bsc-plan/regist/page.tsx
rename to apps/as/app/(main)/(with-base-layout)/sewer-bsc-plan/regist/page.tsx
diff --git a/apps/as/app/layout.tsx b/apps/as/app/(main)/layout.tsx
similarity index 100%
rename from apps/as/app/layout.tsx
rename to apps/as/app/(main)/layout.tsx
diff --git a/apps/as/src/app/styles/globals.css b/apps/as/src/app/styles/globals.css
index e557f947b..bf1ecad16 100644
--- a/apps/as/src/app/styles/globals.css
+++ b/apps/as/src/app/styles/globals.css
@@ -6,10 +6,19 @@
 @tailwind components;
 @tailwind utilities;
 
-html,
-body {
-  color: var(--foreground);
-  background: var(--background);
-  font-family: "Noto Sans KR", sans-serif;
-  font-size: 10px;
+@layer base {
+  :root {
+    --secondary-background: rgba(0, 0, 0, 0.04);
+  }
+  [data-theme="black"] {
+    --secondary-background: rgba(255, 255, 255, 0.09);
+  }
+
+  html,
+  body {
+    color: var(--foreground);
+    background: var(--background);
+    font-family: "Noto Sans KR", sans-serif;
+    font-size: 10px;
+  }
 }