diff --git a/app/src/styles/components/simulation/simulation.scss b/app/src/styles/components/simulation/simulation.scss
index b7ac080..db7b580 100644
--- a/app/src/styles/components/simulation/simulation.scss
+++ b/app/src/styles/components/simulation/simulation.scss
@@ -105,6 +105,7 @@
         height: fit-content;
         cursor: pointer;
         transition: all 0.2s;
+        outline: 1px solid transparent;
 
         &:hover {
           outline: 1px solid var(--border-color);