diff --git a/app/assets/stylesheets/separators.css b/app/assets/stylesheets/separators.css
index 68b797b58..4e3d98241 100644
--- a/app/assets/stylesheets/separators.css
+++ b/app/assets/stylesheets/separators.css
@@ -14,6 +14,5 @@
     border-block-start: var(--border-size, 1px) var(--border-style, solid) var(--border-color, currentColor);
     border-inline: 0;
     display: flex;
-    inline-size: 100%;
   }
 }
diff --git a/app/views/columns/show/_add_card_button.html.erb b/app/views/columns/show/_add_card_button.html.erb
index 4d6d4e50d..b7bc78959 100644
--- a/app/views/columns/show/_add_card_button.html.erb
+++ b/app/views/columns/show/_add_card_button.html.erb
@@ -4,7 +4,7 @@
     <span>Add a card</span>
   <% end %>
 
-  <hr class="separator--horizontal" aria-hidden="true">
+  <hr class="separator--horizontal full-width" aria-hidden="true">
 
   <footer>
     <strong class="txt-uppercase">Watching for new cards</strong>