Put external dependencies into dedicated directories

tubio-frontend-nuxt-app/layouts/README.md

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+# LAYOUTS
+
+**This directory is not required, you can delete it if you don't want to use it.**
+
+This directory contains your Application Layouts.
+
+More information about the usage of this directory in [the documentation](https://nuxtjs.org/guide/views#layouts).

tubio-frontend-nuxt-app/layouts/default.vue

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+<template>
+  <div>
+    <Nuxt />
+  </div>
+</template>
+
+<style>
+html {
+  font-family:
+    'Source Sans Pro',
+    -apple-system,
+    BlinkMacSystemFont,
+    'Segoe UI',
+    Roboto,
+    'Helvetica Neue',
+    Arial,
+    sans-serif;
+  font-size: 16px;
+  word-spacing: 1px;
+  -ms-text-size-adjust: 100%;
+  -webkit-text-size-adjust: 100%;
+  -moz-osx-font-smoothing: grayscale;
+  -webkit-font-smoothing: antialiased;
+  box-sizing: border-box;
+}
+
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+  margin: 0;
+}
+
+.button--green {
+  display: inline-block;
+  border-radius: 4px;
+  border: 1px solid #3b8070;
+  color: #3b8070;
+  text-decoration: none;
+  padding: 10px 30px;
+}
+
+.button--green:hover {
+  color: #fff;
+  background-color: #3b8070;
+}
+
+.button--grey {
+  display: inline-block;
+  border-radius: 4px;
+  border: 1px solid #35495e;
+  color: #35495e;
+  text-decoration: none;
+  padding: 10px 30px;
+  margin-left: 15px;
+}
+
+.button--grey:hover {
+  color: #fff;
+  background-color: #35495e;
+}
+</style>