diff --git a/apps/dashboard/src/App.css b/apps/dashboard/src/App.css
index 3666519..d29bf54 100644
--- a/apps/dashboard/src/App.css
+++ b/apps/dashboard/src/App.css
@@ -5,22 +5,46 @@
   color: #000000;
 }
 
-.dashboard-header {
-  background: #000000;
-  border-bottom: 1px solid #e5e5e5;
-  color: white;
-  padding: 1rem 2rem;
-  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+/* Header Banner System - Consistent Design Language */
+
+/* Level 1: Dashboard Banner - Top-level app identifier */
+.dashboard-banner {
+  background: #f1f5f9;
+  border-bottom: 1px solid #cbd5e1;
+  padding: 0.75rem 2rem;
+  position: sticky;
+  top: 0;
+  z-index: 50;
 }
 
+.banner-content {
+  max-width: 1200px;
+  margin: 0 auto;
+  display: flex;
+  align-items: center;
+  gap: 0.625rem;
+  font-size: 0.875rem;
+  font-weight: 600;
+  color: #475569;
+  letter-spacing: -0.025em;
+}
 
+/* Level 2: Page Header - Main page identification */
+.dashboard-header {
+  background: #334155;
+  border-bottom: 1px solid #475569;
+  color: white;
+  padding: 1.25rem 2rem;
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
+}
 
 .header-content {
   max-width: 1200px;
   margin: 0 auto;
   display: flex;
   align-items: center;
-  justify-content: space-between;
+  justify-content: flex-start;
+  gap: 1.5rem;
 }
 
 .logo {
@@ -32,196 +56,120 @@
 .logo h1 {
   margin: 0;
   font-size: 1.5rem;
-  font-weight: 700;
+  font-weight: 600;
   color: white;
   letter-spacing: -0.025em;
 }
 
 .header-subtitle {
   margin: 0;
-  opacity: 0.85;
   font-size: 0.875rem;
-  font-weight: 500;
-  color: #cccccc;
-  display: none;
+  font-weight: 400;
+  color: #cbd5e1;
   letter-spacing: 0.025em;
 }
 
 @media (min-width: 768px) {
-  .header-subtitle {
-    display: block;
-  }
-
   .header-content {
-    justify-content: flex-start;
     gap: 2rem;
   }
 
   .logo h1 {
-    font-size: 1.75rem;
+    font-size: 1.5rem;
   }
 }
 
-/* Page Navigation */
+/* Level 3: Page Navigation - Inter-page navigation */
 .page-nav {
-  background: transparent;
+  background: #f8fafc;
+  border-bottom: 1px solid #e2e8f0;
   padding: 1rem 2rem;
   display: flex;
   gap: 0.5rem;
   max-width: 1200px;
   margin: 0 auto;
-  border-radius: 0.75rem;
-  margin-top: -0.5rem;
-  position: relative;
-  z-index: 10;
 }
 
 .page-button {
   display: flex;
   align-items: center;
-  gap: 0.625rem;
-  padding: 1rem 1.5rem;
-  border: 2px solid transparent;
-  background: transparent;
-  border-radius: 0.75rem;
+  gap: 0.5rem;
+  padding: 0.75rem 1.25rem;
+  border: 1px solid #cbd5e1;
+  background: #ffffff;
+  border-radius: 0.5rem;
   cursor: pointer;
-  font-weight: 600;
-  font-size: 0.95rem;
-  transition: all 0.3s ease;
-  color: #64748b;
-  text-transform: capitalize;
+  font-weight: 500;
+  font-size: 0.875rem;
+  transition: all 0.2s ease;
+  color: #475569;
   letter-spacing: -0.025em;
-  position: relative;
-  overflow: hidden;
-  min-width: 160px;
+  text-decoration: none;
+  min-width: 140px;
   justify-content: center;
 }
 
-.page-button::before {
-  content: '';
-  position: absolute;
-  top: 0;
-  left: -100%;
-  width: 100%;
-  height: 100%;
-  background: linear-gradient(90deg,
-    transparent,
-    rgba(16, 185, 129, 0.3),
-    transparent);
-  transition: left 0.5s ease;
-}
-
 .page-button:hover {
-  background: transparent;
-  border-color: #10b981;
-  color: #059669;
-  transform: translateY(-2px);
-  box-shadow: 0 8px 16px rgba(16, 185, 129, 0.2);
-}
-
-.page-button:hover::before {
-  left: 100%;
+  background: #f1f5f9;
+  border-color: #94a3b8;
+  color: #334155;
 }
 
 .page-button.active {
-  background: transparent;
-  border-color: #10b981;
-  color: #059669;
-  box-shadow: 0 8px 20px rgba(16, 185, 129, 0.3);
-  transform: translateY(-1px);
-}
-
-.page-button.active::before {
-  background: linear-gradient(90deg,
-    transparent,
-    rgba(16, 185, 129, 0.2),
-    transparent);
+  background: #475569;
+  border-color: #475569;
+  color: #ffffff;
 }
 
 .page-button.active:hover {
-  transform: translateY(-3px);
-  box-shadow: 0 12px 24px rgba(16, 185, 129, 0.4);
+  background: #334155;
+  border-color: #334155;
 }
 
-/* Metric Navigation */
+/* Level 4: Metric Navigation - Metric selection within pages */
 .dashboard-nav {
-  background: transparent;
-  padding: 1.25rem 2rem;
+  background: #f8fafc;
+  border-bottom: 1px solid #e2e8f0;
+  padding: 1rem 2rem;
   display: flex;
   gap: 0.5rem;
   max-width: 1200px;
   margin: 0 auto;
-  border-radius: 0.75rem;
-  margin-top: -0.5rem;
-  position: relative;
-  z-index: 10;
 }
 
 .nav-button {
   display: flex;
   align-items: center;
-  gap: 0.625rem;
-  padding: 1rem 2rem;
-  border: 2px solid transparent;
-  background: transparent;
-  border-radius: 0.75rem;
+  gap: 0.5rem;
+  padding: 0.75rem 1.25rem;
+  border: 1px solid #cbd5e1;
+  background: #ffffff;
+  border-radius: 0.5rem;
   cursor: pointer;
-  font-weight: 600;
-  font-size: 0.95rem;
-  transition: all 0.3s ease;
-  color: #64748b;
-  text-transform: capitalize;
+  font-weight: 500;
+  font-size: 0.875rem;
+  transition: all 0.2s ease;
+  color: #475569;
   letter-spacing: -0.025em;
-  position: relative;
-  overflow: hidden;
-  min-width: 140px;
+  min-width: 120px;
   justify-content: center;
 }
 
-.nav-button::before {
-  content: '';
-  position: absolute;
-  top: 0;
-  left: -100%;
-  width: 100%;
-  height: 100%;
-  background: linear-gradient(90deg,
-    transparent,
-    rgba(255, 255, 255, 0.6),
-    transparent);
-  transition: left 0.5s ease;
-}
-
 .nav-button:hover {
-  background: transparent;
+  background: #f1f5f9;
   border-color: #94a3b8;
-  color: #475569;
-  transform: translateY(-2px);
-  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
-}
-
-.nav-button:hover::before {
-  left: 100%;
+  color: #334155;
 }
 
 .nav-button.active {
-  background: transparent;
-  border-color: #000000;
-  color: #000000;
-  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
-  transform: translateY(-1px);
-}
-
-.nav-button.active::before {
-  background: linear-gradient(90deg,
-    transparent,
-    rgba(255, 255, 255, 0.2),
-    transparent);
+  background: #475569;
+  border-color: #475569;
+  color: #ffffff;
 }
 
 .nav-button.active:hover {
-  transform: translateY(-3px);
-  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.4);
+  background: #334155;
+  border-color: #334155;
 }
 
 /* Main Content */
@@ -237,19 +185,19 @@
 /* Chart Container */
 .chart-container {
   background: white;
-  border: 1px solid #e5e5e5;
+  border: 1px solid #e2e8f0;
   padding: 2rem;
-  border-radius: 0.5rem;
-  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+  border-radius: 0.75rem;
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
 }
 
 
 
 .chart-container h2 {
   margin: 0 0 1.5rem 0;
-  color: #111827;
-  font-size: 1.5rem;
-  font-weight: 600;
+  color: #1e293b;
+  font-size: 1.75rem;
+  font-weight: 700;
   letter-spacing: -0.025em;
 }
 
@@ -262,11 +210,11 @@
 
 .stat-card {
   background: white;
-  border: 1px solid #e5e5e5;
+  border: 1px solid #e2e8f0;
   padding: 1.75rem;
-  border-radius: 0.5rem;
-  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
-  border-left: 4px solid #000000;
+  border-radius: 0.75rem;
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
+  border-left: 4px solid #3b82f6;
   transition: all 0.2s ease;
 }
 
@@ -279,7 +227,7 @@
 
 .stat-card h3 {
   margin: 0 0 0.75rem 0;
-  color: #6b7280;
+  color: #64748b;
   font-size: 0.875rem;
   font-weight: 600;
   text-transform: uppercase;
@@ -290,7 +238,7 @@
   margin: 0 0 0.75rem 0;
   font-size: 2.25rem;
   font-weight: 700;
-  color: #111827;
+  color: #1e293b;
   letter-spacing: -0.025em;
   line-height: 1.1;
 }
@@ -366,13 +314,13 @@
 
 .library-title {
   margin: 0 0 1rem 0;
-  font-size: 1.125rem;
-  font-weight: 600;
-  color: #111827;
+  font-size: 1.25rem;
+  font-weight: 700;
+  color: #1e293b;
   text-transform: capitalize;
   text-align: center;
   padding-bottom: 0.5rem;
-  border-bottom: 2px solid #e5e7eb;
+  border-bottom: 2px solid #e2e8f0;
 }
 
 /* Responsive Design */
diff --git a/apps/dashboard/src/components/Layout.tsx b/apps/dashboard/src/components/Layout.tsx
index 2977166..0f2edd9 100644
--- a/apps/dashboard/src/components/Layout.tsx
+++ b/apps/dashboard/src/components/Layout.tsx
@@ -1,4 +1,4 @@
-import { Package, Zap } from 'lucide-react';
+import { BarChart3, Package, Zap } from 'lucide-react';
 import { Link, Outlet, useLocation } from 'react-router-dom';
 
 function Layout() {
@@ -6,6 +6,14 @@ function Layout() {
 
   return (
     <>
+      {/* Rolldown-Vite Dashboard Banner */}
+      <div className='dashboard-banner'>
+        <div className='banner-content'>
+          <BarChart3 size={16} />
+          <span>Rolldown-Vite Dashboard</span>
+        </div>
+      </div>
+
       {/* Page Navigation */}
       <nav className='page-nav'>
         <Link
diff --git a/apps/dashboard/src/index.css b/apps/dashboard/src/index.css
index 134805d..8fcad59 100644
--- a/apps/dashboard/src/index.css
+++ b/apps/dashboard/src/index.css
@@ -4,7 +4,7 @@
   font-weight: 400;
 
   color: #1e293b;
-  background: linear-gradient(135deg, #0c1618 0%, #134e4a 50%, #1f2937 100%);
+  background: #f8fafc;
 
   font-synthesis: none;
   text-rendering: optimizeLegibility;
@@ -20,8 +20,7 @@ body {
   margin: 0;
   min-width: 320px;
   min-height: 100vh;
-  background: linear-gradient(135deg, #0c1618 0%, #134e4a 50%, #1f2937 100%);
-  background-attachment: fixed;
+  background: #f8fafc;
 }
 
 h1, h2, h3, h4, h5, h6 {
diff --git a/apps/dashboard/src/pages/RolldownStatsPage.tsx b/apps/dashboard/src/pages/RolldownStatsPage.tsx
index 7bf176e..5e348c5 100644
--- a/apps/dashboard/src/pages/RolldownStatsPage.tsx
+++ b/apps/dashboard/src/pages/RolldownStatsPage.tsx
@@ -1,4 +1,3 @@
-import { BarChart3 } from 'lucide-react';
 import { useState } from 'react';
 import RolldownStats from '../RolldownStats';
 
@@ -7,18 +6,6 @@ function RolldownStatsPage() {
 
   return (
     <div className='dashboard'>
-      <header className='dashboard-header'>
-        <div className='header-content'>
-          <div className='logo'>
-            <BarChart3 size={28} />
-            <h1>Rolldown-Vite Dashboard</h1>
-          </div>
-          <p className='header-subtitle'>
-            Statistics collected from different Rolldown-Vite versions
-          </p>
-        </div>
-      </header>
-
       <RolldownStats
         selectedMetric={selectedMetric}
         setSelectedMetric={setSelectedMetric}