diff --git a/src/ui/windows/chat_tab.cpp b/src/ui/windows/chat_tab.cpp
index 6af7595..d8f3b36 100644
--- a/src/ui/windows/chat_tab.cpp
+++ b/src/ui/windows/chat_tab.cpp
@@ -1487,6 +1487,13 @@ void RenderChatTab(App* app)
             const float origSpacingX = ImGui::GetStyle().ItemSpacing.x;
             ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(4.0f * dp, 8.0f * dp));
             ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(origSpacingX, 0.0f));
+            // Thicker, clearly-visible scrollbar for the message thread: the global one is a thin 6px with a
+            // ~6% grab that's hard to see and grab. Pushed for this child only (popped after EndChild below).
+            ImGui::PushStyleVar(ImGuiStyleVar_ScrollbarSize, 12.0f * dp);
+            ImGui::PushStyleVar(ImGuiStyleVar_ScrollbarRounding, 6.0f * dp);
+            ImGui::PushStyleColor(ImGuiCol_ScrollbarGrab,        material::WithAlpha(material::OnSurface(), 55));
+            ImGui::PushStyleColor(ImGuiCol_ScrollbarGrabHovered, material::WithAlpha(material::OnSurface(), 95));
+            ImGui::PushStyleColor(ImGuiCol_ScrollbarGrabActive,  material::WithAlpha(material::OnSurface(), 135));
             ImGui::BeginChild("##ChatMessages", ImVec2(0, ImGui::GetContentRegionAvail().y),
                               ImGuiChildFlags_AlwaysUseWindowPadding, ImGuiWindowFlags_NoScrollWithMouse);
             material::ApplySmoothScroll();   // smooth wheel scroll; syncs with the auto-scroll-to-bottom below
@@ -1951,7 +1958,8 @@ void RenderChatTab(App* app)
                 }
             }
             ImGui::EndChild();
-            ImGui::PopStyleVar(2);  // ##ChatMessages WindowPadding + zeroed vertical ItemSpacing
+            ImGui::PopStyleColor(3);  // ScrollbarGrab + Hovered + Active
+            ImGui::PopStyleVar(4);    // WindowPadding + ItemSpacing + ScrollbarSize + ScrollbarRounding
             // Larger-messages tier 3: while a big incoming message is still arriving across transactions,
             // show a subtle centred progress line (it surfaces as an ordinary bubble once every part lands).
             {