style: rename service to 갤산기 and enlarge navigation brand

offline/OfflineApp.svelte

@@ -95,7 +95,7 @@
 
 <header class="site-nav">
   <div class="nav-inner">
-    <a class="brand" href="#/" aria-label="홀로도리 계산기 홈">홀로도리 계산기</a>
+    <a class="brand" href="#/" aria-label="갤산기 홈">갤산기</a>
     <button class="menu-toggle" type="button" aria-controls="primary-navigation" aria-expanded={menuOpen} on:click={() => menuOpen = !menuOpen}>{menuOpen ? '메뉴 닫기' : '전체 메뉴'}</button>
     <nav id="primary-navigation" class:open={menuOpen} aria-label="주요 메뉴">
       <a href="#/cards" aria-current={currentPath.startsWith('/cards') ? 'page' : undefined}>카드 목록</a>
@@ -155,7 +155,7 @@
 
   .brand {
     color: #f3f5f8;
-    font-size: 16px;
+    font-size: 20px;
     font-weight: 850;
     letter-spacing: -.03em;
     text-decoration: none;
@@ -195,7 +195,7 @@
   @media (max-width: 560px) {
     :global(:root) { --page-gutter: 24px; }
     .nav-inner { width: calc(100% - 24px); min-height: 54px; }
-    .brand { font-size: 13px; }
+    .brand { font-size: 18px; }
     nav { gap: 2px; }
     nav a { padding: 7px 7px; font-size: 12px; }
   }