Simple screens and logic with Navigation Component

app/src/main/res/layout/fragment_login.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <layout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto">
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools">
 
     <androidx.appcompat.widget.LinearLayoutCompat
         android:id="@+id/loginRoot"
@@ -8,6 +9,12 @@
         android:layout_height="match_parent"
         android:orientation="vertical">
 
+        <WebView
+            android:id="@+id/webView"
+            android:layout_width="0dp"
+            android:layout_height="0dp"
+            android:visibility="gone" />
+
         <androidx.core.widget.NestedScrollView
             android:layout_width="match_parent"
             android:layout_height="match_parent"
@@ -16,6 +23,7 @@
             <LinearLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
+                android:animateLayoutChanges="true"
                 android:gravity="center"
                 android:orientation="vertical"
                 android:padding="16dp">
@@ -37,6 +45,14 @@
                         app:tint="?colorAccent" />
                 </FrameLayout>
 
+                <ProgressBar
+                    android:id="@+id/progress"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="48dp"
+                    android:visibility="gone"
+                    tools:visibility="visible" />
+
                 <LinearLayout
                     android:id="@+id/loginContainer"
                     android:layout_width="match_parent"
@@ -110,7 +126,7 @@
                 </LinearLayout>
 
                 <com.google.android.material.button.MaterialButton
-                    android:id="@+id/authorize"
+                    android:id="@+id/auth"
                     style="@style/Widget.MaterialButton"
                     android:layout_width="wrap_content"
                     android:layout_height="60dp"