App.vue

<template>
  <div id="app" :class="{ 'camera-mode': isCameraOpen }">
    <router-view />
  </div>
</template>

<script>
import { mapState } from 'vuex'
export default {
  computed: {
    ...mapState(['isCameraOpen'])
  }
}
</script>

<style>
@import url('https://cdn.bootcss.com/font-awesome/4.7.0/css/font-awesome.css');

* {
  margin: 0;
  padding: 0;
}
a {
  text-decoration: inherit;
}
ul,
ol {
  list-style: none;
}
h1,
h2,
h3,
h4 {
  font: inherit;
}
input,
select,
button {
  font: inherit;
}
html,
body {
  height: 100%;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
    Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}
#app {
}
#app.camera-mode {
  height: 100%;
  overflow: hidden;
}
</style>