diff --git a/src/DodoSSH.Client.App/App.axaml b/src/DodoSSH.Client.App/App.axaml
index 546d9b8..fdae27b 100644
--- a/src/DodoSSH.Client.App/App.axaml
+++ b/src/DodoSSH.Client.App/App.axaml
@@ -153,6 +153,7 @@
       <Setter Property="CornerRadius" Value="6" />
       <Setter Property="Padding" Value="6,2" />
       <Setter Property="MinHeight" Value="0" />
+      <Setter Property="VerticalContentAlignment" Value="Center" />
       <Setter Property="Foreground" Value="{StaticResource TextDim}" />
       <Setter Property="FontFamily" Value="{StaticResource MonoFont}" />
       <Setter Property="FontWeight" Value="Medium" />
@@ -463,6 +464,7 @@
       <Setter Property="Padding" Value="13,7" />
       <Setter Property="HorizontalAlignment" Value="Stretch" />
       <Setter Property="HorizontalContentAlignment" Value="Left" />
+      <Setter Property="VerticalContentAlignment" Value="Center" />
       <Setter Property="CornerRadius" Value="12" />
     </Style>
     <Style Selector="Button.navuser /template/ ContentPresenter#PART_ContentPresenter">
@@ -482,6 +484,7 @@
     <Style Selector="Button.poprow">
       <Setter Property="HorizontalAlignment" Value="Stretch" />
       <Setter Property="HorizontalContentAlignment" Value="Stretch" />
+      <Setter Property="VerticalContentAlignment" Value="Center" />
       <Setter Property="Padding" Value="11,4" />
       <Setter Property="CornerRadius" Value="8" />
       <Setter Property="MinHeight" Value="20" />
@@ -671,6 +674,7 @@
     -->
     <Style Selector="Button.choice">
       <Setter Property="Padding" Value="10,5" />
+      <Setter Property="VerticalContentAlignment" Value="Center" />
       <Setter Property="FontFamily" Value="{StaticResource MonoFont}" />
       <Setter Property="FontSize" Value="10.5" />
       <Setter Property="LetterSpacing" Value="0.5" />
@@ -1120,6 +1124,7 @@
     <Style Selector="Button.panechip">
       <Setter Property="Padding" Value="8,4" />
       <Setter Property="MinHeight" Value="0" />
+      <Setter Property="VerticalContentAlignment" Value="Center" />
       <Setter Property="FontFamily" Value="{StaticResource MonoFont}" />
       <Setter Property="FontSize" Value="11" />
       <Setter Property="FontWeight" Value="Medium" />
diff --git a/tests/DodoSSH.Client.App.Layout.Tests/ButtonCaptionTests.cs b/tests/DodoSSH.Client.App.Layout.Tests/ButtonCaptionTests.cs
index 35c9e72..dbdcf5a 100644
--- a/tests/DodoSSH.Client.App.Layout.Tests/ButtonCaptionTests.cs
+++ b/tests/DodoSSH.Client.App.Layout.Tests/ButtonCaptionTests.cs
@@ -1,13 +1,14 @@
 using System.Globalization;
 using Avalonia;
 using Avalonia.Controls;
+using Avalonia.Controls.Presenters;
 using Avalonia.Layout;
 using Avalonia.VisualTree;
 
 namespace DodoSSH.Client.App.Layout.Tests;
 
 /// <summary>
-/// The three button shapes centre their caption inside a button taller than the caption.
+/// The button shapes that centre their caption do, and the two that deliberately do not still fill.
 /// </summary>
 /// <remarks>
 /// <para>
@@ -41,6 +42,15 @@ namespace DodoSSH.Client.App.Layout.Tests;
 /// action — so an absolute expectation would be a font metric written down in a test file, and it would move
 /// the day the face does. "Centred" survives both.
 /// </para>
+/// <para>
+/// The five shapes beyond the original three were swept in afterwards, and none of them was misbehaving
+/// when it was: every one is content-sized everywhere it is used today, so <c>Stretch</c> and <c>Center</c>
+/// agreed and the change moved nothing — 113 buttons across 29 screens measured byte-identical before and
+/// after. What the sweep buys is that the day any of them is given a height, it is already right. That is
+/// also why <see cref="AStretchingShapeStillFillsItsButton"/> matters more than it looks: the same
+/// reasoning applied to <c>flat</c> or <c>cat</c> would break a pill and a strip that are currently
+/// correct.
+/// </para>
 /// </remarks>
 public sealed class ButtonCaptionTests
 {
@@ -61,6 +71,11 @@ public sealed class ButtonCaptionTests
     [InlineData("ghost")]
     [InlineData("accent")]
     [InlineData("danger")]
+    [InlineData("navuser")]
+    [InlineData("poprow")]
+    [InlineData("panechip")]
+    [InlineData("chiptoggle")]
+    [InlineData("choice")]
     public async Task ACaptionIsCentredInAButtonTallerThanItself(string shape)
     {
         await MeasureAsync(
@@ -96,6 +111,72 @@ public sealed class ButtonCaptionTests
                 "the caption should sit high, which is the defect this suite was written for"));
     }
 
+    /// <summary>
+    /// <c>flat</c> and <c>cat</c> are excluded from the rule above, and must stay excluded.
+    /// </summary>
+    /// <remarks>
+    /// <para>
+    /// Both stretch their content on purpose, and both would be silently broken by a later pass that
+    /// "finished" the sweep the rest of these classes belong to — which is exactly why this is a test and
+    /// not a comment.
+    /// </para>
+    /// <para>
+    /// <c>flat</c> carries the titlebar's search pill, a <c>Border.searchpill</c> with no height of its own
+    /// that is meant to fill all 35 pixels of the button; the usage states
+    /// <c>HorizontalContentAlignment="Stretch"</c> and relies on the vertical default matching it. Centring
+    /// from the style would shrink that pill to its caption's line box inside a button twice as tall.
+    /// <c>cat</c> carries the keychain rail's accent strip, a <c>Border.rowmark</c> whose style sets
+    /// <c>Width="2"</c> and no height at all — "at full row height", says the rule's own remark — so its
+    /// height is the stretch and nothing else.
+    /// </para>
+    /// <para>
+    /// Asserted as "the content fills the button", not as "the caption is off-centre": what these two need
+    /// is the fill, and a test phrased the other way would still pass if the fill broke in some new way.
+    /// </para>
+    /// </remarks>
+    [Theory]
+    [InlineData("flat")]
+    [InlineData("cat")]
+    public async Task AStretchingShapeStillFillsItsButton(string shape)
+    {
+        await LayoutHarness.OnTheUiThreadAsync(
+            () =>
+            {
+                // A bare Border is what both of them actually hold: no height, sized only by its parent.
+                var fill = new Border();
+                var button = new Button { Content = fill, Height = FixedHeight };
+                button.Classes.Add(shape);
+
+                var window = LayoutHarness.HostAtMinimumSize(
+                    button, LayoutHarness.MinimumWidth, LayoutHarness.MinimumHeight);
+
+                try
+                {
+                    // The slot read off the presenter rather than recomputed from the button's Padding:
+                    // these shapes differ in whether their presenter also draws a border, and a hand-rolled
+                    // sum was two pixels out on Button.cat for exactly that reason.
+                    var presenter = button.GetVisualDescendants()
+                        .OfType<ContentPresenter>()
+                        .Single(p => string.Equals(p.Name, "PART_ContentPresenter", StringComparison.Ordinal));
+
+                    var slot = presenter.Bounds.Height
+                        - presenter.Padding.Top - presenter.Padding.Bottom
+                        - presenter.BorderThickness.Top - presenter.BorderThickness.Bottom;
+
+                    fill.Bounds.Height.ShouldBe(
+                        slot,
+                        Tolerance,
+                        $"Button.{shape} must stretch its content — the search pill and the rail's accent "
+                        + "strip have no height of their own");
+                }
+                finally
+                {
+                    window.Close();
+                }
+            },
+            Token);
+    }
+
     private static Task MeasureAsync(
         string shape, VerticalAlignment? alignment, Action<double, double> assert) =>
         LayoutHarness.OnTheUiThreadAsync(