v4.0.0: 헤더 로고 크기 brand.css로 통일

페이지마다 흩어져 있던 로고 스타일을 brand.css 단일 정의(32px)로 모아 전 화면에서 동일하게 표시되도록 수정했다.

Co-authored-by: Cursor <cursoragent@cursor.com>

index.html

@@ -5,6 +5,7 @@
         <meta name="viewport" content="width=device-width, initial-scale=1.0" />
         <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-4516420168710424" crossorigin="anonymous"></script>
         <link rel="stylesheet" href="./style/output.css" />
+        <link rel="stylesheet" href="./style/brand.css" />
         <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&family=Noto+Sans+KR:wght@400;700&display=swap" rel="stylesheet" />
 
         <script src="/script/navigation.js"></script>
@@ -58,8 +59,8 @@
     <body class="text-slate-900">
         <nav class="sticky top-0 z-50 bg-white/70 backdrop-blur-lg border-b border-slate-200">
             <div class="max-w-7xl mx-auto px-6 h-16 flex items-center justify-between">
-                <a href="/" class="inline-flex items-center">
-                    <img src="/images/assets/uniare-h48.png" alt="UNIARE" class="h-8 w-auto" />
+                <a href="/" class="app-brand">
+                    <img src="/images/assets/uniare-h48.png" alt="UNIARE" class="app-brand-logo" width="120" height="32" />
                 </a>
 
                 <div class="flex items-center gap-4">