Fixes #11801: use correct variables for grid containers

diff --git a/less/grid.less b/less/grid.less
index dfae6999b6c1afd5a96c7362a9812870fb2d631c..88957f42a586361bab27f5d35173f5ca3a3d68a5 100644 (file)
--- a/less/grid.less
+++ b/less/grid.less
@@ -10,10 +10,10 @@
 .container {
   .container-fixed();
 
-  @media (min-width: @screen-sm) {
+  @media (min-width: @screen-sm-min) {
     width: @container-sm;
   }
-  @media (min-width: @screen-md) {
+  @media (min-width: @screen-md-min) {
     width: @container-md;
   }
   @media (min-width: @screen-lg-min) {