diff --git a/theme/assets/css/main.css b/theme/assets/css/main.css
index 430c0c5..b32a81c 100644
--- a/theme/assets/css/main.css
+++ b/theme/assets/css/main.css
@@ -1986,6 +1986,8 @@ p:last-child { margin-bottom: 0; }
 
 /* ── 10b. Device Animator ───────────────────────────────────── */
 .platform-visual.has-anim {
+  background: none;
+  border: none;
   padding: 0;
   overflow: hidden;
   position: relative;