global container styles

scss/sections/_main.scss

@@ -1,3 +1,11 @@
+.container {
+  @include margin(($site-margins-mobile * 2) null);
+
+  @include media($medium-screen) {
+    @include margin(($site-margins * 2) null);
+  }
+}
+
 section {
   margin-bottom: 10rem;
-}
+}