Centering character based on game div

Previously, character was centered based on window size, but when doing CoWebsite browsing, window size != game size, leading to poorly centered characters

front/dist/resources/style/style.css

@@ -299,12 +299,11 @@ body {
     flex-basis: 100%;
 }*/
 
-.cowebsite iframe {
+.cowebsite > iframe {
     width: 100%;
     height: 100%;
 }
 
-
 .game-overlay {
     display: none;
     position: absolute;