diff --git a/www/res/styles/styles.css b/www/res/styles/styles.css
index 6cefc73..1f3a1d6 100644
--- a/www/res/styles/styles.css
+++ b/www/res/styles/styles.css
@@ -58,7 +58,7 @@ div#windows > * {
 div#login-win,
 div#welcome-win {
     max-width: 650px;
-    margin: calc(25vh - 8em) auto 1em auto;
+    margin: calc(max(25vh, 8em) - 8em) auto 1em auto;
 }
 
 div#login-win h1,