grunt

dist/css/bootstrap.css

@@ -3885,8 +3885,8 @@ input[type="button"].btn-block {
 }
 .card-deck .card {
   display: table-cell;
-  float: none;
-  max-width: none;
+  width: 1%;
+  vertical-align: top;
 }
 
 .card-deck-wrapper {
@@ -3931,9 +3931,9 @@ input[type="button"].btn-block {
   -webkit-column-count: 3;
      -moz-column-count: 3;
           column-count: 3;
-  -webkit-column-gap: 1rem;
-     -moz-column-gap: 1rem;
-          column-gap: 1rem;
+  -webkit-column-gap: 1.25rem;
+     -moz-column-gap: 1.25rem;
+          column-gap: 1.25rem;
 }
 .card-columns .card {
   display: inline-block;