diff --git a/front-end/app/app.vue b/front-end/app/app.vue
index c6c8467..f8eacfa 100644
--- a/front-end/app/app.vue
+++ b/front-end/app/app.vue
@@ -1,78 +1,5 @@
-<script setup>
-useHead({
-  meta: [
-    { name: 'viewport', content: 'width=device-width, initial-scale=1' }
-  ],
-  link: [
-    { rel: 'icon', href: '/favicon.ico' }
-  ],
-  htmlAttrs: {
-    lang: 'en'
-  }
-})
-
-const title = 'Nuxt Starter Template'
-const description = 'A production-ready starter template powered by Nuxt UI. Build beautiful, accessible, and performant applications in minutes, not hours.'
-
-useSeoMeta({
-  title,
-  description,
-  ogTitle: title,
-  ogDescription: description,
-  ogImage: 'https://ui.nuxt.com/assets/templates/nuxt/starter-light.png',
-  twitterImage: 'https://ui.nuxt.com/assets/templates/nuxt/starter-light.png',
-  twitterCard: 'summary_large_image'
-})
-</script>
-
 <template>
-  <UApp>
-    <UHeader>
-      <template #left>
-        <NuxtLink to="/">
-          <AppLogo class="w-auto h-6 shrink-0" />
-        </NuxtLink>
-
-        <TemplateMenu />
-      </template>
-
-      <template #right>
-        <UColorModeButton />
-
-        <UButton
-          to="https://github.com/nuxt-ui-templates/starter"
-          target="_blank"
-          icon="i-simple-icons-github"
-          aria-label="GitHub"
-          color="neutral"
-          variant="ghost"
-        />
-      </template>
-    </UHeader>
-
-    <UMain>
-      <NuxtPage />
-    </UMain>
-
-    <USeparator icon="i-simple-icons-nuxtdotjs" />
-
-    <UFooter>
-      <template #left>
-        <p class="text-sm text-muted">
-          Built with Nuxt UI • © {{ new Date().getFullYear() }}
-        </p>
-      </template>
-
-      <template #right>
-        <UButton
-          to="https://github.com/nuxt-ui-templates/starter"
-          target="_blank"
-          icon="i-simple-icons-github"
-          aria-label="GitHub"
-          color="neutral"
-          variant="ghost"
-        />
-      </template>
-    </UFooter>
-  </UApp>
+  <NuxtLayout>
+    <NuxtPage />
+  </NuxtLayout>
 </template>
diff --git a/front-end/app/components/AppSidebar.vue b/front-end/app/components/AppSidebar.vue
new file mode 100644
index 0000000..f042232
--- /dev/null
+++ b/front-end/app/components/AppSidebar.vue
@@ -0,0 +1,177 @@
+<script setup lang="ts">
+import { editais } from '~/data/mock/editais'
+import { prazos } from '~/data/mock/prazos'
+import { documentos } from '~/data/mock/documentos'
+
+const { user, logout } = useAuth()
+const route = useRoute()
+
+const contagemPorStatus = computed(() => {
+  const counts: Record<string, number> = {}
+  for (const e of editais) {
+    counts[e.status] = (counts[e.status] ?? 0) + 1
+  }
+  return counts
+})
+
+const alertasPrazos = computed(() => prazos.filter(p => p.urgencia === 'critico' || p.urgencia === 'urgente').length)
+const docsVencendo = computed(() => documentos.filter(d => d.status === 'vencendo' || d.status === 'vencida').length)
+
+const navItems = computed(() => [
+  {
+    label: '',
+    items: [
+      { label: 'Dashboard', icon: 'i-heroicons-home', to: '/' },
+    ],
+  },
+  {
+    label: 'Oportunidades',
+    items: [
+      { label: 'Todos os Editais', icon: 'i-heroicons-clipboard-document-list', to: '/oportunidades', badge: editais.length, badgeVariant: 'default' },
+      { label: 'Em Análise', icon: 'i-heroicons-magnifying-glass', to: '/oportunidades/em-analise', badge: contagemPorStatus.value.em_analise ?? 0, badgeVariant: 'default' },
+      { label: 'Elaborando Proposta', icon: 'i-heroicons-pencil-square', to: '/oportunidades/elaborando-proposta', badge: contagemPorStatus.value.elaborando_proposta ?? 0, badgeVariant: 'warning' },
+      { label: 'Participando', icon: 'i-heroicons-play', to: '/oportunidades/participando', badge: contagemPorStatus.value.participando ?? 0, badgeVariant: 'default' },
+      { label: 'Recurso', icon: 'i-heroicons-scale', to: '/oportunidades/recurso', badge: contagemPorStatus.value.recurso ?? 0, badgeVariant: 'warning' },
+      { label: 'Vencidas', icon: 'i-heroicons-trophy', to: '/oportunidades/vencidas', badge: contagemPorStatus.value.vencida ?? 0, badgeVariant: 'success' },
+      { label: 'Perdidas', icon: 'i-heroicons-x-circle', to: '/oportunidades/perdidas', badge: contagemPorStatus.value.perdida ?? 0, badgeVariant: 'neutral' },
+    ],
+  },
+  {
+    label: 'Pipeline',
+    items: [
+      { label: 'Kanban de Processos', icon: 'i-heroicons-view-columns', to: '/pipeline' },
+    ],
+  },
+  {
+    label: 'Gestão',
+    items: [
+      { label: 'Documentos', icon: 'i-heroicons-folder', to: '/gestao/documentos', badge: docsVencendo.value || undefined, badgeVariant: 'warning' },
+      { label: 'Prazos', icon: 'i-heroicons-clock', to: '/gestao/prazos', badge: alertasPrazos.value || undefined, badgeVariant: 'warning' },
+      { label: 'Órgãos Públicos', icon: 'i-heroicons-building-library', to: '/gestao/orgaos' },
+      { label: 'Concorrentes', icon: 'i-heroicons-building-office-2', to: '/gestao/concorrentes' },
+      { label: 'Contratos', icon: 'i-heroicons-document-text', to: '/gestao/contratos' },
+    ],
+  },
+  {
+    label: 'Inteligência',
+    items: [
+      { label: 'Inteligência de Mercado', icon: 'i-heroicons-chart-bar', to: '/inteligencia' },
+    ],
+  },
+  {
+    label: 'Sistema',
+    items: [
+      { label: 'Usuários', icon: 'i-heroicons-users', to: '/sistema/usuarios' },
+      { label: 'Configurações', icon: 'i-heroicons-cog-6-tooth', to: '/sistema/configuracoes' },
+    ],
+  },
+])
+
+function isActive(to: string) {
+  return route.path === to
+}
+</script>
+
+<template>
+  <aside class="sidebar">
+    <div class="sidebar-logo">
+      <div class="logo-icon">
+        <UIcon name="i-heroicons-home" class="text-white w-4 h-4" />
+      </div>
+      <span class="logo-name">Licitatche</span>
+    </div>
+
+    <nav class="sidebar-nav">
+      <template v-for="group in navItems" :key="group.label">
+        <p v-if="group.label" class="nav-label">{{ group.label }}</p>
+        <NuxtLink
+          v-for="item in group.items"
+          :key="item.to"
+          :to="item.to"
+          class="nav-item"
+          :class="{ active: isActive(item.to) }"
+        >
+          <UIcon :name="item.icon" class="nav-icon" />
+          <span class="nav-text">{{ item.label }}</span>
+          <UBadge
+            v-if="item.badge"
+            :label="String(item.badge)"
+            variant="soft"
+            :color="item.badgeVariant === 'warning' ? 'warning' : item.badgeVariant === 'success' ? 'success' : item.badgeVariant === 'neutral' ? 'neutral' : 'primary'"
+            size="xs"
+          />
+        </NuxtLink>
+        <div v-if="group.label" class="nav-divider" />
+      </template>
+    </nav>
+
+    <div class="sidebar-footer">
+      <div class="user-row">
+        <UAvatar :alt="user?.nome ?? 'A'" size="xs" />
+        <div class="user-info">
+          <p class="user-name">{{ user?.nome }}</p>
+          <p class="user-role">{{ user?.papel }}</p>
+        </div>
+        <UButton icon="i-heroicons-arrow-right-on-rectangle" variant="ghost" color="neutral" size="xs" @click="logout" />
+      </div>
+    </div>
+  </aside>
+</template>
+
+<style scoped>
+.sidebar {
+  width: 232px;
+  min-height: 100vh;
+  background: #0f172a;
+  display: flex;
+  flex-direction: column;
+  flex-shrink: 0;
+  overflow-y: auto;
+}
+.sidebar-logo {
+  padding: 18px 14px 14px;
+  display: flex;
+  align-items: center;
+  gap: 9px;
+  border-bottom: 1px solid #1e293b;
+  position: sticky;
+  top: 0;
+  background: #0f172a;
+  z-index: 1;
+}
+.logo-icon {
+  width: 32px; height: 32px;
+  background: linear-gradient(135deg, #667eea, #764ba2);
+  border-radius: 8px;
+  display: flex; align-items: center; justify-content: center;
+}
+.logo-name { font-size: 14px; font-weight: 700; color: #f1f5f9; }
+.sidebar-nav { padding: 8px; flex: 1; }
+.nav-label {
+  font-size: 9.5px; font-weight: 700; color: #475569;
+  text-transform: uppercase; letter-spacing: 1px;
+  padding: 8px 8px 3px;
+}
+.nav-item {
+  display: flex; align-items: center; gap: 8px;
+  padding: 7px 8px; border-radius: 7px;
+  color: #94a3b8; text-decoration: none;
+  font-size: 12.5px; margin-bottom: 1px;
+  transition: background 0.15s;
+}
+.nav-item:hover { background: #1e293b; color: #e2e8f0; }
+.nav-item.active { background: #1e3a5f; color: #93c5fd; }
+.nav-icon { width: 15px; height: 15px; flex-shrink: 0; }
+.nav-text { flex: 1; }
+.nav-divider { height: 1px; background: #1e293b; margin: 4px 0; }
+.sidebar-footer {
+  padding: 10px 8px;
+  border-top: 1px solid #1e293b;
+  position: sticky; bottom: 0; background: #0f172a;
+}
+.user-row { display: flex; align-items: center; gap: 8px; padding: 6px 8px; border-radius: 7px; }
+.user-row:hover { background: #1e293b; }
+.user-info { flex: 1; }
+.user-name { font-size: 12px; font-weight: 600; color: #e2e8f0; }
+.user-role { font-size: 10.5px; color: #64748b; }
+</style>
diff --git a/front-end/app/components/AppTopbar.vue b/front-end/app/components/AppTopbar.vue
new file mode 100644
index 0000000..764998c
--- /dev/null
+++ b/front-end/app/components/AppTopbar.vue
@@ -0,0 +1,33 @@
+<script setup lang="ts">
+defineProps<{
+  title: string
+  breadcrumb?: string
+}>()
+</script>
+
+<template>
+  <header class="topbar">
+    <div>
+      <h1 class="topbar-title">{{ title }}</h1>
+      <p v-if="breadcrumb" class="topbar-breadcrumb">{{ breadcrumb }}</p>
+    </div>
+    <div class="topbar-actions">
+      <slot name="actions" />
+    </div>
+  </header>
+</template>
+
+<style scoped>
+.topbar {
+  background: white;
+  border-bottom: 1px solid #e2e8f0;
+  padding: 13px 22px;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  flex-shrink: 0;
+}
+.topbar-title { font-size: 16px; font-weight: 700; color: #0f172a; }
+.topbar-breadcrumb { font-size: 11px; color: #94a3b8; margin-top: 1px; }
+.topbar-actions { display: flex; gap: 8px; align-items: center; }
+</style>
diff --git a/front-end/app/layouts/auth.vue b/front-end/app/layouts/auth.vue
new file mode 100644
index 0000000..85055d7
--- /dev/null
+++ b/front-end/app/layouts/auth.vue
@@ -0,0 +1,28 @@
+<template>
+  <div class="auth-layout">
+    <div class="bg-circle bg-circle-1" />
+    <div class="bg-circle bg-circle-2" />
+    <slot />
+  </div>
+</template>
+
+<style scoped>
+.auth-layout {
+  min-height: 100vh;
+  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 20px;
+  position: relative;
+  overflow: hidden;
+}
+.bg-circle {
+  position: absolute;
+  border-radius: 50%;
+  background: rgba(255, 255, 255, 0.05);
+  pointer-events: none;
+}
+.bg-circle-1 { width: 400px; height: 400px; top: -100px; right: -100px; }
+.bg-circle-2 { width: 300px; height: 300px; bottom: -80px; left: -80px; }
+</style>
diff --git a/front-end/app/layouts/default.vue b/front-end/app/layouts/default.vue
new file mode 100644
index 0000000..26b36e1
--- /dev/null
+++ b/front-end/app/layouts/default.vue
@@ -0,0 +1,23 @@
+<template>
+  <div class="app-layout">
+    <AppSidebar />
+    <div class="app-main">
+      <slot />
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.app-layout {
+  display: flex;
+  min-height: 100vh;
+  background: #f1f5f9;
+}
+.app-main {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+  min-width: 0;
+}
+</style>