diff --git a/PediFoods/ContentView.swift b/PediFoods/ContentView.swift
index 254f04c..90881e0 100644
--- a/PediFoods/ContentView.swift
+++ b/PediFoods/ContentView.swift
@@ -32,11 +32,13 @@ struct ContentView: View {
                         tokenStore: tokenStore,
                         appState: $appState
                     )
+                    .transition(.move(edge: .trailing))
                 case .main:
                     if isBootstrappingSession {
                         sessionBootstrapLoadingView
                     } else {
                         MainTabView(selectedTab: $selectedTab, tokenStore: tokenStore, appState: $appState, enterAuth: enterAuthFlow)
+                            .transition(.move(edge: .leading))
                     }
                 }
             }
@@ -408,7 +410,9 @@ struct ContentView: View {
     /// decisions/2026-08-27-payment-auth-lockout-clean-intro-screen.md.
     @MainActor
     private func enterAuthFlow() {
-        root = .auth
+        withAnimation(.easeInOut(duration: 0.3)) {
+            root = .auth
+        }
     }
 
     @MainActor
diff --git a/PediFoods/Views/Auth/LoginEmailView.swift b/PediFoods/Views/Auth/LoginEmailView.swift
index a85de32..163ef38 100644
--- a/PediFoods/Views/Auth/LoginEmailView.swift
+++ b/PediFoods/Views/Auth/LoginEmailView.swift
@@ -1,4 +1,7 @@
 import SwiftUI
+#if canImport(LCEssentials)
+import LCEssentials
+#endif
 
 struct LoginEmailView: View {
     @Binding var root: RootFlow
@@ -11,7 +14,6 @@ struct LoginEmailView: View {
     @State var isLoading = false
     @State var errorMessage: String?
     @Environment(\.dismiss) var dismiss
-    @Environment(\.colorScheme) var colorScheme
 
     @ViewBuilder private var logoImage: some View {
         SwiftUI.Image("pedifoods")
@@ -19,8 +21,18 @@ struct LoginEmailView: View {
     }
 
     var body: some View {
+        LCENavigationView {
+            content
+        }
+        .setLeftButton(image: AnyView(AppBackButtonIcon())) { dismiss() }
+        .setNavigationBarBackgroundColor(AppColors.backgroundLight)
+        .buttonStyle(.plain)
+        .preferredColorScheme(.light)
+    }
+
+    private var content: some View {
         ZStack {
-            (colorScheme == .dark ? Color.black : AppColors.backgroundLight).ignoresSafeArea()
+            AppColors.backgroundLight.ignoresSafeArea()
 
             VStack(spacing: 0) {
                 logoImage
@@ -29,7 +41,7 @@ struct LoginEmailView: View {
 
                 Text("Boas-vindas!")
                     .font(AppTypography.heading1)
-                    .foregroundStyle(colorScheme == .dark ? Color.white : AppColors.textPrimary)
+                    .foregroundStyle(AppColors.textPrimary)
                     .padding(Edge.Set.top, 8)
                     .padding(.bottom, 16)
 
@@ -66,7 +78,7 @@ struct LoginEmailView: View {
 
                 HStack(spacing: 6) {
                     Text("Novo por aqui?")
-                        .foregroundStyle(colorScheme == .dark ? Color.white.opacity(0.8) : Color.gray)
+                        .foregroundStyle(Color.gray)
                     Text("Crie sua conta")
                         .foregroundStyle(AppColors.primary)
                         .onTapGesture {
diff --git a/PediFoods/Views/Auth/LoginView.swift b/PediFoods/Views/Auth/LoginView.swift
index dfa36a3..6413d9e 100644
--- a/PediFoods/Views/Auth/LoginView.swift
+++ b/PediFoods/Views/Auth/LoginView.swift
@@ -16,7 +16,9 @@ struct LoginView: View {
         LCENavigationView {
             content
         }
-        .setLeftButton(image: AnyView(AppBackButtonIcon())) { root = .main }
+        .setLeftButton(image: AnyView(AppBackButtonIcon())) {
+            withAnimation(.easeInOut(duration: 0.3)) { root = .main }
+        }
         .setTitle(text: Text("Acesse sua conta").font(AppTypography.heading2).foregroundStyle(AppColors.textPrimary))
         .setNavigationBarBackgroundColor(AppColors.backgroundLight)
         .buttonStyle(.plain)
diff --git a/PediFoods/Views/Auth/OtpView.swift b/PediFoods/Views/Auth/OtpView.swift
index bcf93ce..4816b37 100644
--- a/PediFoods/Views/Auth/OtpView.swift
+++ b/PediFoods/Views/Auth/OtpView.swift
@@ -1,5 +1,8 @@
 import SwiftUI
 import UIKit
+#if canImport(LCEssentials)
+import LCEssentials
+#endif
 
 struct OtpView: View {
     private let resendDelaySeconds = 45
@@ -21,13 +24,23 @@ struct OtpView: View {
     @Environment(\.dismiss) var dismiss
 
     var body: some View {
+        LCENavigationView {
+            content
+        }
+        .setLeftButton(image: AnyView(AppBackButtonIcon())) { dismiss() }
+        .setNavigationBarBackgroundColor(AppColors.backgroundLight)
+        .buttonStyle(.plain)
+        .preferredColorScheme(.light)
+    }
+
+    private var content: some View {
         ScrollView {
             VStack(spacing: 0) {
                 SwiftUI.Image("pedifoods")
                     .resizable()
                     .scaledToFit()
                     .frame(width: 74, height: 74)
-                    .padding(.top, 140)
+                    .padding(.top, 48)
 
                 Text("Verificação")
                     .font(AppTypography.heading1)
@@ -122,7 +135,6 @@ struct OtpView: View {
         }
         .scrollDismissesKeyboard(.interactively)
         .background(AppColors.backgroundLight)
-        .ignoresSafeArea()
         .onAppear {
             isOtpFocused = true
             startResendCooldown()
diff --git a/PediFoods/Views/Auth/RegistrationView.swift b/PediFoods/Views/Auth/RegistrationView.swift
index a03f8bb..cb2441d 100644
--- a/PediFoods/Views/Auth/RegistrationView.swift
+++ b/PediFoods/Views/Auth/RegistrationView.swift
@@ -1,4 +1,7 @@
 import SwiftUI
+#if canImport(LCEssentials)
+import LCEssentials
+#endif
 
 struct RegistrationView: View {
     @Binding var root: RootFlow
@@ -12,7 +15,6 @@ struct RegistrationView: View {
     @State var isLoading = false
     @State var errorMessage: String?
     @Environment(\.dismiss) var dismiss
-    @Environment(\.colorScheme) var colorScheme
     let navigate: (Route) -> Void
 
     private var isFormValid: Bool { !name.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty && !email.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty && !phone.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty && acceptedTerms }
@@ -23,8 +25,18 @@ struct RegistrationView: View {
     }
 
     var body: some View {
+        LCENavigationView {
+            content
+        }
+        .setLeftButton(image: AnyView(AppBackButtonIcon())) { dismiss() }
+        .setNavigationBarBackgroundColor(AppColors.backgroundLight)
+        .buttonStyle(.plain)
+        .preferredColorScheme(.light)
+    }
+
+    private var content: some View {
         ZStack {
-            (colorScheme == .dark ? Color.black : AppColors.backgroundLight).ignoresSafeArea()
+            AppColors.backgroundLight.ignoresSafeArea()
 
             ScrollView {
                 VStack(spacing: 0) {
@@ -34,11 +46,11 @@ struct RegistrationView: View {
 
                     Text("Crie sua conta")
                         .font(AppTypography.heading1)
-                        .foregroundStyle(colorScheme == .dark ? Color.white : AppColors.textPrimary)
+                        .foregroundStyle(AppColors.textPrimary)
 
                     Text("Preencha os dados abaixo para começar.")
                         .font(AppTypography.body)
-                        .foregroundStyle(colorScheme == .dark ? Color.white : AppColors.textPrimary)
+                        .foregroundStyle(AppColors.textPrimary)
                         .padding(.top, 8)
                         .padding(.bottom, 20)
 
@@ -64,7 +76,7 @@ struct RegistrationView: View {
 
                         Group {
                             Text("Ao se cadastrar, você concorda com nossos [Termos de Uso](app://terms) e [Política de Privacidade](app://policy)")
-                                .foregroundStyle(colorScheme == .dark ? Color.white : AppColors.textPrimary)
+                                .foregroundStyle(AppColors.textPrimary)
                                 .tint(AppColors.primary)
                                 .environment(\.openURL, OpenURLAction { url in
                                     guard url.scheme == "app" else { return .handled }
@@ -98,7 +110,7 @@ struct RegistrationView: View {
 
                     HStack(spacing: 6) {
                         Text("Já tem uma conta?")
-                            .foregroundStyle(colorScheme == .dark ? Color.white.opacity(0.8) : AppColors.textPrimary)
+                            .foregroundStyle(AppColors.textPrimary)
                         NavigationLink("Entrar") {
                             LoginEmailView(root: $root, selectedTab: $selectedTab, tokenStore: tokenStore, appState: $appState, navigate: navigate)
                         }
@@ -110,7 +122,6 @@ struct RegistrationView: View {
                     Spacer().frame(height: 12)
                 }
             }
-            .padding(.top, -40)
         }
     }
 
diff --git a/PediFoodsUITests/ProfileLoggedOutFlowTests.swift b/PediFoodsUITests/ProfileLoggedOutFlowTests.swift
index 2445888..5a547e3 100644
--- a/PediFoodsUITests/ProfileLoggedOutFlowTests.swift
+++ b/PediFoodsUITests/ProfileLoggedOutFlowTests.swift
@@ -40,4 +40,29 @@ final class ProfileLoggedOutFlowTests: XCTestCase {
         // Back out of `.auth` lands on the main tab bar again.
         XCTAssertTrue(app.buttons["Home"].waitForExistence(timeout: 5), "Back button did not return to the main flow")
     }
+
+    /// The pushed auth screens (Registration, LoginEmail) must carry the
+    /// app's standard `AppBackButtonIcon` via `LCENavigationView`, not the
+    /// oversized iOS 26 system glass back button.
+    func testPushedAuthScreensUseAppBackButton() throws {
+        let app = XCUIApplication()
+        app.launch()
+        XCTAssertTrue(app.reachLoggedOutProfile())
+        app.buttons["Entrar ou Cadastrar"].tap()
+
+        XCTAssertTrue(app.buttons["Criar conta"].waitForExistence(timeout: 5))
+        app.buttons["Criar conta"].tap()
+        XCTAssertTrue(app.staticTexts["Crie sua conta"].waitForExistence(timeout: 5))
+        let regBack = app.buttons.matching(NSPredicate(format: "label == %@", "Back")).firstMatch
+        XCTAssertTrue(regBack.exists, "Registration screen has no LCENavigationView back button")
+        regBack.tap()
+
+        XCTAssertTrue(app.buttons["Entrar"].waitForExistence(timeout: 5))
+        app.buttons["Entrar"].tap()
+        XCTAssertTrue(app.staticTexts["Boas-vindas!"].waitForExistence(timeout: 5))
+        let loginBack = app.buttons.matching(NSPredicate(format: "label == %@", "Back")).firstMatch
+        XCTAssertTrue(loginBack.exists, "Login e-mail screen has no LCENavigationView back button")
+        loginBack.tap()
+        XCTAssertTrue(app.buttons["Criar conta"].waitForExistence(timeout: 5), "Back did not return to the auth intro")
+    }
 }