feat: hero effect with dynamic navbar height and inline title

app/components/navigation/MainNavigation.vue

@@ -1,7 +1,8 @@
 <template>
   <header
-    class="h-[100px] shadow-lg"
+    class="shadow-lg"
     :class="glassStyle ? 'bg-black/30 backdrop-blur-md border-b border-white/10' : 'bg-base-100 border-b border-base-300'"
+    :style="{ height: `${height}px` }"
   >
     <!-- Single row: Logo + Search + Icons -->
     <div class="flex items-stretch h-full px-4 lg:px-6 gap-4">
@@ -36,6 +37,9 @@
 
       <!-- Center: Search input (vertically centered) -->
       <div class="flex-1 flex flex-col items-center max-w-2xl mx-auto gap-2 justify-center">
+        <!-- Hero slot for home page title -->
+        <slot name="hero" />
+
         <!-- Quote mode: Simple segmented input with search inside (white glass) -->
         <template v-if="catalogMode === 'quote'">
           <div class="flex items-center w-full rounded-full border border-white/40 bg-white/80 backdrop-blur-md shadow-lg divide-x divide-base-300/30">
@@ -274,7 +278,7 @@ import { entityColors } from '~/composables/useCatalogSearch'
 
 import type { CatalogMode } from '~/composables/useCatalogSearch'
 
-const props = defineProps<{
+const props = withDefaults(defineProps<{
   sessionChecked?: boolean
   loggedIn?: boolean
   userAvatarSvg?: string
@@ -304,7 +308,11 @@ const props = defineProps<{
   showActiveMode?: boolean  // Whether to show active state on mode toggle
   // Glass style (transparent) for map pages
   glassStyle?: boolean
-}>()
+  // Dynamic height for hero effect
+  height?: number
+}>(), {
+  height: 100
+})
 
 defineEmits([
   'toggle-theme',

app/layouts/topnav.vue

@@ -8,24 +8,10 @@
         <div class="absolute inset-0 bg-[radial-gradient(ellipse_at_center,_var(--tw-gradient-stops))] from-primary/20 via-transparent to-transparent" />
       </template>
 
-      <!-- Hero title (home page only, fades on scroll) -->
+      <!-- MainNavigation - dynamic height on home page -->
-      <div
-        v-if="isHomePage"
-        class="absolute left-0 right-0 text-center pointer-events-none z-20"
-        :style="heroTitleStyle"
-      >
-        <h1 class="text-4xl lg:text-5xl font-bold text-white mb-2">
-          {{ $t('hero.title', 'Оптовая торговля') }}
-        </h1>
-        <p class="text-lg text-white/70">
-          {{ $t('hero.subtitle', 'Найдите лучших поставщиков и товары') }}
-        </p>
-      </div>
-
-      <!-- MainNavigation - same everywhere, centered vertically on home page -->
       <MainNavigation
         class="relative z-10"
-        :style="mainNavStyle"
+        :height="isHomePage ? heroHeight : 100"
         :session-checked="sessionChecked"
         :logged-in="isLoggedIn"
         :user-avatar-svg="userAvatarSvg"
@@ -58,7 +44,19 @@
         @update:search-query="searchQuery = $event"
         @update-quantity="setQuantity"
         @search="onSearch"
-      />
+      >
+        <!-- Hero content for home page -->
+        <template v-if="isHomePage && collapseProgress < 1" #hero>
+          <div class="text-center mb-4" :style="{ opacity: 1 - collapseProgress }">
+            <h1 class="text-4xl lg:text-5xl font-bold text-white mb-2">
+              {{ $t('hero.title', 'Оптовая торговля') }}
+            </h1>
+            <p class="text-lg text-white/70">
+              {{ $t('hero.subtitle', 'Найдите лучших поставщиков и товары') }}
+            </p>
+          </div>
+        </template>
+      </MainNavigation>
 
       <!-- Sub Navigation (section-specific tabs) - only for non-catalog/non-home sections -->
       <SubNavigation
@@ -177,12 +175,8 @@ const hasSubNav = computed(() => !isHomePage.value && !isCatalogSection.value)
 const canCollapse = computed(() => hasSubNav.value)
 const isHeaderCollapsed = computed(() => canCollapse.value && isCollapsed.value)
 
-// Header container style - dynamic height for home page, transform for SubNav pages
+// Header container style - transform for SubNav pages
 const headerContainerStyle = computed(() => {
-  if (isHomePage.value) {
-    // Home page: height changes from heroHeight to 100px on scroll
-    return { height: `${heroHeight.value}px` }
-  }
   if (hasSubNav.value) {
     // SubNav pages: slide up on scroll
     return { transform: `translateY(${headerOffset.value}px)` }
@@ -190,25 +184,6 @@ const headerContainerStyle = computed(() => {
   return {}
 })
 
-// MainNavigation style - centered vertically on home page, normal on other pages
-const mainNavStyle = computed(() => {
-  if (!isHomePage.value) return {}
-  // Center MainNav (100px) in container: margin-top = (height - 100) / 2
-  const marginTop = Math.max(0, (heroHeight.value - 100) / 2)
-  return { marginTop: `${marginTop}px` }
-})
-
-// Hero title style - positioned above MainNav, fades on scroll
-const heroTitleStyle = computed(() => {
-  // Position title above the centered MainNav
-  const navMarginTop = Math.max(0, (heroHeight.value - 100) / 2)
-  const titleBottom = heroHeight.value - navMarginTop + 20 // 20px gap above nav
-  return {
-    bottom: `${titleBottom}px`,
-    opacity: 1 - collapseProgress.value,
-    transform: `translateY(${collapseProgress.value * -20}px)`
-  }
-})
 
 // Main content padding-top to compensate for fixed header
 const mainStyle = computed(() => {