style new log button

app/frontend/styles/application.scss

@@ -1,9 +1,9 @@
 @function frontend-font-url($filename) {
-  @return url("~assets/fonts/" + $filename);
+  @return url("~assets/fonts/"+$filename);
 }
 
 @function frontend-image-url($filename) {
-  @return url("~assets/images/" + $filename);
+  @return url("~assets/images/"+$filename);
 }
 
 $govuk-font-url-function: frontend-font-url;
@@ -43,3 +43,9 @@ $govuk-global-styles: true;
 .govuk-tag {
   white-space: nowrap;
 }
+
+.button_to {
+  @include govuk-media-query($until: tablet) {
+    width: 100%;
+  }
+}