diff --git a/static/style.css b/static/style.css
index 85c5b57..1a08446 100644
--- a/static/style.css
+++ b/static/style.css
@@ -160,7 +160,7 @@ p#play a:hover {
 }
 
 form#select {
-    width: 500px;
+    width: 100%;
     margin: 1em auto;
     background: #FFCC00;
     border-radius: 1em;
diff --git a/static/style_red.css b/static/style_red.css
index 658ce62..54922b4 100644
--- a/static/style_red.css
+++ b/static/style_red.css
@@ -160,7 +160,7 @@ p#play a:hover {
 }
 
 form#select {
-    width: 500px;
+    width: 100%;
     margin: 1em auto;
     background: #FA0;
     border-radius: 1em;