diff --git a/src/app.css b/src/app.css
index c9577bc..83767ef 100644
--- a/src/app.css
+++ b/src/app.css
@@ -4,6 +4,9 @@
 }
 
 html, body {
+  display: flex;
+  justify-content: center;
+  align-items: center;
   margin: 0;
   padding: 0;
   height: 100%;
@@ -16,6 +19,8 @@ html, body {
 
 #root {
   height: 100%;
+  max-width: 600px;
+  width: 100vw;
 }
 
 .app {