tiles.sass in jekyll-bulma-0.8

- old
+ new

@@ -1,24 +1,26 @@
+$tile-spacing: 0.75rem !default
+
 .tile
   align-items: stretch
   display: block
   flex-basis: 0
   flex-grow: 1
   flex-shrink: 1
   min-height: min-content
   // Modifiers
   &.is-ancestor
-    margin-left: -0.75rem
-    margin-right: -0.75rem
-    margin-top: -0.75rem
+    margin-left: $tile-spacing * -1
+    margin-right: $tile-spacing * -1
+    margin-top: $tile-spacing * -1
     &:last-child
-      margin-bottom: -0.75rem
+      margin-bottom: $tile-spacing * -1
     &:not(:last-child)
-      margin-bottom: 0.75rem
+      margin-bottom: $tile-spacing
   &.is-child
     margin: 0 !important
   &.is-parent
-    padding: 0.75rem
+    padding: $tile-spacing
   &.is-vertical
     flex-direction: column
     & > .tile.is-child:not(:last-child)
       margin-bottom: 1.5rem !important
   // Responsiveness