public class ResponsiveGridBehavior : Behavior<CollectionView>
{
	protected override void OnAttachedTo(CollectionView bindable)
	{
		base.OnAttachedTo(bindable);
		if (DeviceInfo.Idiom == DeviceIdiom.Desktop)
			bindable.SizeChanged += OnSizeChanged;
	}

	protected override void OnDetachingFrom(CollectionView bindable)
	{
		if (DeviceInfo.Idiom == DeviceIdiom.Desktop)
			bindable.SizeChanged -= OnSizeChanged;
		base.OnDetachingFrom(bindable);
	}

	private void OnSizeChanged(object? sender, EventArgs e)
	{
		if (sender is CollectionView collectionView && collectionView.ItemsLayout is GridItemsLayout gridItemsLayout)
		{
			double maxWidthPerItem = Application.Current!.GetResource<double>("CardMaximumWidth", 300);
			gridItemsLayout.Span = Math.Max(1, (int)(collectionView.Width / maxWidthPerItem));
		}
	}
}