diff --git a/resources/public/style.css b/resources/public/style.css
index d47cae6..6abdee7 100644
--- a/resources/public/style.css
+++ b/resources/public/style.css
@@ -22,7 +22,7 @@ body {
   align-items: center;
 }
 
-svg {
+svg.visualization {
   display: block;
   width: 500px;
   height: 500px;
diff --git a/src/heyarne/rect_packing/core.cljs b/src/heyarne/rect_packing/core.cljs
index be84301..0ad9781 100644
--- a/src/heyarne/rect_packing/core.cljs
+++ b/src/heyarne/rect_packing/core.cljs
@@ -53,7 +53,7 @@
         sorted (map-indexed vector (pack-rects-naive frame rects))]
     [:main
      [:h1 "Visualization"]
-     [:svg {:viewBox "-1 -1 501 501" :xmlns "http://www.w3.org/2000/svg"}
+     [:svg.visualization {:viewBox "-0.5 -0.5 501 501" :xmlns "http://www.w3.org/2000/svg"}
       [:rect {:width (geom/width frame)
               :height (geom/height frame)}]
       (for [[idx rect] sorted]