diff --git a/app/assets/stylesheets/events.css b/app/assets/stylesheets/events.css
index 393f4fadf..430a9b50a 100644
--- a/app/assets/stylesheets/events.css
+++ b/app/assets/stylesheets/events.css
@@ -13,10 +13,12 @@
 
     background-color: var(--color-selected-light);
     font-style: italic;
+    inline-size: auto;
     line-height: 1.3;
     margin-inline: auto;
     max-inline-size: 80ch;
     padding: 1.3lh 1lh 1lh;
+    transition: all 300ms ease;
 
     a {
       font-weight: 500;
diff --git a/app/views/events/day_timeline/_activity_summary.html.erb b/app/views/events/day_timeline/_activity_summary.html.erb
index 44d613089..d4ab7c977 100644
--- a/app/views/events/day_timeline/_activity_summary.html.erb
+++ b/app/views/events/day_timeline/_activity_summary.html.erb
@@ -1,3 +1,3 @@
-<div class="events__activity-summary margin-block txt-small border border-radius" id="<%= summary.key %>">
+<div id="<%= summary.key %>">
   <%= summary.to_html %>
 </div>
diff --git a/app/views/events/day_timeline/_summary.html.erb b/app/views/events/day_timeline/_summary.html.erb
index 1ea737976..38fde140a 100644
--- a/app/views/events/day_timeline/_summary.html.erb
+++ b/app/views/events/day_timeline/_summary.html.erb
@@ -1,17 +1,19 @@
-<% if day_timeline.summarized? %>
-  <div class="position-relative">
-    <%= render "events/day_timeline/activity_summary", summary: day_timeline.summary %>
+<div class="events__activity-summary margin-block txt-small border border-radius">
+  <% if !day_timeline.summarized? %>
+    <div class="position-relative">
+      <%= render "events/day_timeline/activity_summary", summary: day_timeline.summary %>
 
-    <% if Current.user.staff? %>
-      <%= link_to admin_prompt_sandbox_path(day: day_timeline.day), class: "btn txt-xx-small" do %>
-        <%= icon_tag "bolt" %>
-        <span class="for-screen-reader">Prompt sandbox</span>
+      <% if Current.user.staff? %>
+        <%= link_to admin_prompt_sandbox_path(day: day_timeline.day), class: "btn txt-xx-small" do %>
+          <%= icon_tag "bolt" %>
+          <span class="for-screen-reader">Prompt sandbox</span>
+        <% end %>
       <% end %>
-    <% end %>
-  </div>
-<% else %>
-  <div id="<%= day_timeline.summary_key %>">
-    <%= auto_submit_form_with url: events_activity_summaries_path(day: day_timeline.day, **day_timeline.filter.as_params), method: :post %>
-    Generating summary...
-  </div>
-<% end %>
+    </div>
+  <% else %>
+    <div id="<%= day_timeline.summary_key %>">
+      <%= auto_submit_form_with url: events_activity_summaries_path(day: day_timeline.day, **day_timeline.filter.as_params), method: :post %>
+      Generating summary...
+    </div>
+  <% end %>
+</div>