Use dvh for height when possible

src/app.module.scss

 .app {
   height: 100%;
+  height: 100dvh;
   display: grid;
   grid-template-rows: auto 1fr;
 }

src/index.css

@@ -94,6 +94,7 @@ body,
 
 .anti-cheat-content {
   height: 100vh;
+  height: 100dvh;
   width: 100vw;
   overflow: hidden;
 }