thinner margin on small devices

_sass/minima/_layout.scss

@@ -175,6 +175,9 @@
  */
 .page-content {
   margin-top: 100px;
+  @include media-query($on-palm) {
+    margin-left: 20px;
+  }
   margin-left: 50px;
   padding: $spacing-unit 0;
 }