Remove flex shorthand

sass/components/grid.sass

@@ -1,5 +1,7 @@
 .column
-  flex: 1 1 auto
+  flex-basis: 0
+  flex-grow: 1
+  flex-shrink: 1
   padding: 10px
   .columns.is-mobile > &.is-narrow
     flex: none
@@ -227,7 +229,6 @@
     +tablet
       flex-wrap: wrap
       & > .column
-        flex-basis: 33.3333%
         max-width: 33.3333%
         padding: 10px
         width: 33.3333%
@@ -250,7 +251,9 @@
 
 .tile
   align-items: stretch
-  flex: 1 1 auto
+  flex-basis: 0
+  flex-grow: 1
+  flex-shrink: 1
   min-height: min-content
   // Modifiers
   &.is-ancestor