Update layout

layouts/empty.vue

@@ -1,5 +1,5 @@
 <template>
-  <v-app>
+  <v-app :style="{ background: $vuetify.theme.themes[theme].background }">
     <v-main>
       <Nuxt />
     </v-main>
@@ -11,6 +11,11 @@
 <script>
 export default {
   name: 'EmptyLayout',
-  layout: 'empty'
+  layout: 'empty',
+  computed: {
+    theme () {
+      return (this.$vuetify.theme.dark) ? 'dark' : 'light'
+    }
+  }
 }
 </script>