MainPage.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="Notebook.MainPage">
    <ScrollView>
        <AbsoluteLayout>
            <!-- Notes list -->
            <CollectionView 
                x:Name="NotesCollectionView"
                AbsoluteLayout.LayoutFlags="All" 
                AbsoluteLayout.LayoutBounds="0,0,1,1">
                <CollectionView.ItemTemplate>
                    <DataTemplate>
                        <Frame BackgroundColor="#0000ff" CornerRadius="10" Padding="10" Margin="5">
                            <Frame.GestureRecognizers>
                                <TapGestureRecognizer
                                    Tapped="OnNoteTapped"
                                    CommandParameter="{Binding .}"/>
                            </Frame.GestureRecognizers>
                            <StackLayout>
                                <Label 
                                    Style="{StaticResource SubHeadline}" 
                                    HorizontalOptions="Start" TextColor="#ffffff" 
                                    Text="{Binding Name}" />
                                <Label 
                                    TextColor="#00f0ff" 
                                    Text="{Binding ModificationDate}" />
                            </StackLayout>
                        </Frame>
                    </DataTemplate>
                </CollectionView.ItemTemplate>
            </CollectionView>

            <!-- Button to add notes -->
            <Button Text="+"
                    Clicked="OnAddItemClicked"
                    AbsoluteLayout.LayoutFlags="PositionProportional"
                    Margin="10"
                    AbsoluteLayout.LayoutBounds="1,1,-1,-1" />
        </AbsoluteLayout>
    </ScrollView>
</ContentPage>