diff --git a/frontend/src/components/dashboard/DashboardHeader.tsx b/frontend/src/components/dashboard/DashboardHeader.tsx
index 5f9896a..f39d6ba 100644
--- a/frontend/src/components/dashboard/DashboardHeader.tsx
+++ b/frontend/src/components/dashboard/DashboardHeader.tsx
@@ -45,11 +45,8 @@ export function DashboardHeader({
   ];
 
   return (
-    <header className="relative flex h-12 shrink-0 items-center overflow-hidden bg-[linear-gradient(180deg,#37a184_0%,#29724f_20%,#07412e_100%)] px-5 text-white shadow-[0_2px_10px_rgba(0,0,0,0.20)]">
-      <div className="pointer-events-none absolute inset-x-0 top-0 h-[45%] bg-white/10" />
-      <div className="pointer-events-none absolute inset-x-0 bottom-0 h-px bg-emerald-200/50" />
-
-      <div className="side-left-group relative z-10 flex h-full min-w-0 shrink-0 items-center gap-3">
+    <header className="dashboard-header-bar shrink-0 overflow-hidden">
+      <div className="side-left-group min-w-0 shrink-0">
         <span className="side-title-main main_tit flex shrink-0 items-center gap-[10px] text-[20px] font-bold tracking-[-0.5px] text-[#bad8ca]">
           <span>총괄기획실</span>
           <span>|</span>
@@ -83,7 +80,7 @@ export function DashboardHeader({
         </div>
       </div>
 
-      <div className="side-right-actions relative z-10 ml-auto flex shrink-0 items-center gap-3">
+      <div className="side-right-actions shrink-0">
         <button
           type="button"
           onClick={onOpenTaskManager}
diff --git a/frontend/src/index.css b/frontend/src/index.css
index a6f0bfc..8b4f353 100644
--- a/frontend/src/index.css
+++ b/frontend/src/index.css
@@ -60,6 +60,35 @@ body,
   box-shadow: 0 0 8px #ffeb3b, inset 0 1px 2px rgba(255, 255, 255, 0.4);
 }
 
+/* F12 aside.side — 헤더 바 전체 */
+.dashboard-header-bar {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  position: relative;
+  z-index: 10;
+  height: 48px;
+  min-height: 48px;
+  padding: 0 22px 0 20px;
+  background: linear-gradient(180deg, #37a184 0%, #29724f 20%, #07412e 100%);
+  border-bottom: 1px solid #135643;
+  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
+  color: #fff;
+}
+
+.side-left-group {
+  display: flex;
+  align-items: center;
+  gap: 16px;
+  height: 100%;
+}
+
+.side-right-actions {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+
 /* F12 Design Planning Hub — 타이틀 */
 .main_tit {
   color: #bad8ca;