diff --git a/src/components/layout/header.tsx b/src/components/layout/header.tsx
index 11f785c..709c6e0 100644
--- a/src/components/layout/header.tsx
+++ b/src/components/layout/header.tsx
@@ -1,48 +1,21 @@
 "use client";
 
-import { useEffect, useState } from "react";
-import { cn } from "@/lib/utils";
+import { useEffect } from "react";
 import { useAuthStore } from "@/store/auth-store";
 import { useMenuStore } from "@/store/menu-store";
-import { useThemeStore } from "@/store/theme-store";
-import {
-  Bell, LogOut, Sun, Moon, User, BookOpen,
-  Home, Shield,
-} from "lucide-react";
+import { LogOut, User } from "lucide-react";
 
 export function Header() {
   const { user, logout } = useAuthStore();
   const { topMenus, activeTopMenu, fetchTopMenus, fetchSideMenus } = useMenuStore();
-  const { theme, toggleTheme } = useThemeStore();
-  const [approvalCount, setApprovalCount] = useState(0);
 
   useEffect(() => {
     fetchTopMenus();
   }, [fetchTopMenus]);
 
-  useEffect(() => {
-    const fetchApprovalCount = async () => {
-      try {
-        const res = await fetch("/api/approval/count");
-        if (res.ok) {
-          const data = await res.json();
-          setApprovalCount(data.count || 0);
-        }
-      } catch { /* ignore */ }
-    };
-    fetchApprovalCount();
-    const interval = setInterval(fetchApprovalCount, 60000);
-    return () => clearInterval(interval);
-  }, []);
-
-  // 관리자 메뉴 분리 (기존 header.jsp openAdminMngPop 대응)
-  const userMenus = topMenus.filter((m) => m.MENU_NAME_KOR !== "관리자");
-  const adminMenu = topMenus.find((m) => m.MENU_NAME_KOR === "관리자");
-
-  // 초기 로드: 항상 "사용자" 메뉴의 사이드바를 불러오기
+  // 초기 로드: "사용자" 메뉴의 사이드바를 불러오기 (관리자 제외)
   useEffect(() => {
     if (topMenus.length > 0 && !activeTopMenu) {
-      // "관리자" 제외하고 "사용자" 메뉴를 명시적으로 찾아서 로드
       const userMenu = topMenus.find((m) => m.MENU_NAME_KOR !== "관리자");
       if (userMenu) {
         fetchSideMenus(userMenu.OBJID);
@@ -50,103 +23,30 @@ export function Header() {
     }
   }, [topMenus, activeTopMenu, fetchSideMenus]);
 
-  const handleTopMenuClick = (menuObjId: string) => {
-    fetchSideMenus(menuObjId);
-  };
-
-  // 기존 openAdminMngPop() 대응 - 관리자 팝업
-  const openAdminPopup = () => {
-    if (adminMenu) {
-      window.open(
-        `/admin-panel?menuId=${adminMenu.OBJID}`,
-        "adminPanel",
-        "width=1630,height=950,menuBar=no,status=no"
-      );
-    }
-  };
-
   return (
-    <header className="h-12 bg-white border-b border-gray-200 flex items-center px-4 shrink-0">
-      <button
-        onClick={() => {
-          if (userMenus.length > 0) handleTopMenuClick(userMenus[0].OBJID);
-        }}
-        className="mr-4 text-gray-500 hover:text-primary transition-colors"
+    <header className="h-12 bg-white border-b border-gray-200 flex items-center px-3 sm:px-4 shrink-0 gap-2">
+      {/* 좌측 여백만 — 모바일에서 사이드바 토글이 이 영역을 차지함 */}
+      <div className="flex-1" />
+
+      {/* 우측: 사용자명(프로필 링크) + 로그아웃 */}
+      <a
+        href="/profile"
+        className="flex items-center gap-1.5 text-xs sm:text-sm text-gray-600 hover:text-emerald-700 hover:underline"
+        title="회원정보 수정"
       >
-        <Home size={18} />
+        <User size={14} className="text-gray-400" />
+        <span className="truncate max-w-[200px]">
+          {user?.userName} {user?.deptName ? `(${user.deptName})` : ""}
+        </span>
+      </a>
+
+      <button
+        onClick={logout}
+        className="p-2 text-gray-500 hover:text-red-500 rounded transition-colors"
+        title="로그아웃"
+      >
+        <LogOut size={16} />
       </button>
-
-      {/* 상위 메뉴 - 관리자 제외 */}
-      <nav className="flex items-center gap-1 flex-1 overflow-x-auto">
-        {userMenus.map((menu) => (
-          <button
-            key={menu.OBJID}
-            onClick={() => handleTopMenuClick(menu.OBJID)}
-            className={cn(
-              "px-3 py-1.5 text-[13px] rounded whitespace-nowrap transition-colors",
-              activeTopMenu === menu.OBJID
-                ? "bg-primary text-white font-semibold"
-                : "text-gray-600 hover:bg-gray-100"
-            )}
-          >
-            {menu.MENU_NAME_KOR}
-          </button>
-        ))}
-      </nav>
-
-      <div className="flex items-center gap-1 ml-4">
-        <button className="relative p-2 text-gray-500 hover:text-primary rounded transition-colors" title="결재함">
-          <Bell size={16} />
-          {approvalCount > 0 && (
-            <span className="absolute -top-0.5 -right-0.5 bg-red-500 text-white text-[10px] font-bold rounded-full min-w-[16px] h-4 flex items-center justify-center px-1">
-              {approvalCount}
-            </span>
-          )}
-        </button>
-
-        <button className="p-2 text-gray-500 hover:text-primary rounded transition-colors" title="매뉴얼">
-          <BookOpen size={16} />
-        </button>
-
-        <button
-          onClick={toggleTheme}
-          className="p-2 text-gray-500 hover:text-primary rounded transition-colors"
-          title={theme === "sage" ? "블루 테마" : "세이지 테마"}
-        >
-          {theme === "sage" ? <Moon size={16} /> : <Sun size={16} />}
-        </button>
-
-        {/* 관리자 버튼 - plm_admin만 표시 */}
-        {user?.isAdmin && adminMenu && (
-          <button
-            onClick={openAdminPopup}
-            className="px-2.5 py-1 text-xs font-semibold text-orange-600 bg-orange-50 hover:bg-orange-100 border border-orange-200 rounded transition-colors"
-            title="관리자"
-          >
-            <Shield size={13} className="inline mr-1" />
-            Admin
-          </button>
-        )}
-
-        <div className="flex items-center gap-2 ml-2 pl-2 border-l border-gray-200">
-          <User size={14} className="text-gray-400" />
-          <a
-            href="/profile"
-            className="text-xs text-gray-600 hover:text-emerald-700 hover:underline"
-            title="회원정보 수정"
-          >
-            {user?.userName} {user?.deptName ? `(${user.deptName})` : ""}
-          </a>
-        </div>
-
-        <button
-          onClick={logout}
-          className="p-2 text-gray-500 hover:text-red-500 rounded transition-colors"
-          title="로그아웃"
-        >
-          <LogOut size={16} />
-        </button>
-      </div>
     </header>
   );
 }