M6.16: Unified hybrid species grid + codex-styled hover popover

StepSpecies hybrid mode now uses one grid combining sire-clade species
(under a "SIRE — <Clade>" eyebrow) and dam-clade species (under
"DAM — <Clade>"). Cards are click-to-select like the purebred path —
since clades are guaranteed disjoint by StepClade's parent-conflict
rule, the lineage is implicit from the species' clade and no per-card
toggles are needed.

Hover popover now picks up the codex theme: parchment Bg2 panel with a
gild border, rounded 14px corners, and soft drop shadow; H3 display
serif title, mono Eyebrow tag, CardBody description. Detriment popovers
swap to a 3px seal-red border via the panel_detriment stylebox override
(replaces the old red Modulate hack).

Theme propagation fix: CanvasLayer breaks Godot's Control theme
inheritance, so the popup was rendering on Godot defaults. _Ready
defers a lookup of the parent Control's theme and assigns it directly
to the popup so the codex parchment + Cormorant/CrimsonPro fonts
actually resolve.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Theriapolis.Godot/Scenes/Widgets/PopoverLayer.cs

@@ -46,18 +46,33 @@ public partial class PopoverLayer : CanvasLayer
     {
         Layer = 100;
         BuildPopover();
+        // Theme inheritance walks Control descendants only — CanvasLayer is
+        // a plain Node, so it breaks the propagation chain from the Wizard
+        // Control above. _Ready is bottom-up, so the parent Wizard hasn't
+        // assigned its codex theme yet — defer the lookup until parent's
+        // _Ready has run, then pull its theme onto the popup directly.
+        CallDeferred(MethodName.InheritParentTheme);
+    }
+
+    private void InheritParentTheme()
+    {
+        if (GetParent() is Control parentControl && parentControl.Theme is not null)
+            _popup.Theme = parentControl.Theme;
     }
 
     private void BuildPopover()
     {
         // Ignore so clicks/scroll/hover all pass through to whatever's
         // beneath. The popover is purely a visual readout; the chip
-        // owns the lifecycle entirely.
+        // owns the lifecycle entirely. ThemeTypeVariation pulls the
+        // CodexPopover stylebox (parchment bg2 + gild border + rounded
+        // corners + soft shadow) defined in CodexTheme.
         _popup = new PanelContainer
         {
             Visible = false,
             MouseFilter = Control.MouseFilterEnum.Ignore,
             ZIndex = 100,
+            ThemeTypeVariation = "CodexPopover",
         };
         AddChild(_popup);
 
@@ -66,19 +81,29 @@ public partial class PopoverLayer : CanvasLayer
         _popup.AddChild(v);
 
         var nameRow = new HBoxContainer();
-        nameRow.AddThemeConstantOverride("separation", 8);
+        nameRow.AddThemeConstantOverride("separation", 10);
         v.AddChild(nameRow);
 
-        _titleLabel = new Label();
+        // Display-serif title at H3 size (20px) — pulls the trait name
+        // out of the body copy below.
+        _titleLabel = new Label { ThemeTypeVariation = "H3" };
         nameRow.AddChild(_titleLabel);
 
-        _tagLabel = new Label { Visible = false };
+        // Mono uppercase tag label, vertically centred against the title.
+        _tagLabel = new Label
+        {
+            Visible = false,
+            ThemeTypeVariation = "Eyebrow",
+            VerticalAlignment = VerticalAlignment.Center,
+            SizeFlagsVertical = Control.SizeFlags.ShrinkCenter,
+        };
         nameRow.AddChild(_tagLabel);
 
         _descLabel = new Label
         {
             AutowrapMode = TextServer.AutowrapMode.WordSmart,
             CustomMinimumSize = new Vector2(220, 0),
+            ThemeTypeVariation = "CardBody",
         };
         v.AddChild(_descLabel);
     }
@@ -91,10 +116,18 @@ public partial class PopoverLayer : CanvasLayer
         _tagLabel.Text = !string.IsNullOrEmpty(tag) ? tag.ToUpperInvariant()
                                                     : (detriment ? "DETRIMENT" : "");
 
-        // M6.3 default-theme tint: detriment popover gets a red modulate so
-        // it reads visually distinct from a regular trait. The proper
-        // codex StyleBox swap lands in the theming pass.
-        _popup.Modulate = detriment ? new Color(1f, 0.78f, 0.78f) : Colors.White;
+        // Detriment popover swaps to the seal-bordered stylebox via
+        // override; non-detriment clears the override so the default
+        // CodexPopover panel takes effect again.
+        if (detriment && _popup.HasThemeStylebox("panel_detriment", "CodexPopover"))
+        {
+            var box = _popup.GetThemeStylebox("panel_detriment", "CodexPopover");
+            _popup.AddThemeStyleboxOverride("panel", box);
+        }
+        else
+        {
+            _popup.RemoveThemeStyleboxOverride("panel");
+        }
 
         _popup.Visible = true;
         _popup.ResetSize();