diff --git a/app/static/styles.css b/app/static/styles.css
index b804d82..b37b625 100644
--- a/app/static/styles.css
+++ b/app/static/styles.css
@@ -88,9 +88,9 @@ a { color: inherit; text-decoration: none; }
 .brand-logo-mark svg { color: #fff; }
 
 .brand-logo-img {
-  height: 28px;
+  height: 36px;
   width: auto;
-  max-width: 160px;
+  max-width: 180px;
   object-fit: contain;
 }
 
diff --git a/app/templates/main.html b/app/templates/main.html
index ec30fb7..18b931a 100644
--- a/app/templates/main.html
+++ b/app/templates/main.html
@@ -11,8 +11,19 @@
     <!-- ── 헤더 ── -->
     <header class="header">
       <div class="header-brand">
-        <img src="/static/dbx-logo.png" alt="DBX Corporation" class="header-logo-img" />
-        <span class="header-portal">업무 포털</span>
+        <div class="header-logo-mark">
+          <svg width="18" height="18" viewBox="0 0 24 24" fill="none"
+               stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round">
+            <rect x="3" y="3" width="7" height="7" rx="1"/>
+            <rect x="14" y="3" width="7" height="7" rx="1"/>
+            <rect x="3" y="14" width="7" height="7" rx="1"/>
+            <rect x="14" y="14" width="7" height="7" rx="1"/>
+          </svg>
+        </div>
+        <div class="header-brand-text">
+          <span class="header-company">DBX Corporation</span>
+          <span class="header-portal">업무 포털</span>
+        </div>
       </div>
 
       <div class="header-user">