diff --git a/_layouts/default.html b/_layouts/default.html
index e16b59b7..600d3ddb 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -1,18 +1,48 @@
 <!DOCTYPE html>
-	<html>
-		<head>
-			<title>{{ page.title }}</title>
-			<!-- link to main stylesheet -->
-			<link rel="stylesheet" type="text/css" href="/css/main.css">
-		</head>
-		<body>
-			{{ content }}
-			</div><!-- /.container -->
-			<footer>
-	    		<ul>
-	        		<li><a href="https://www.linkedin.com/in/huuthanhnguyen/">linkedin</a></li>
-	        		<li><a href="github.com/giongto35">github.com/giongto35</a></li>
-				</ul>
-			</footer>
-		</body>
-	</html>
+<html lang="{{ site.lang | default: "en-US" }}">
+  <head>
+
+    {% if site.google_analytics %}
+      <script async src="https://www.googletagmanager.com/gtag/js?id={{ site.google_analytics }}"></script>
+      <script>
+        window.dataLayer = window.dataLayer || [];
+        function gtag(){dataLayer.push(arguments);}
+        gtag('js', new Date());
+        gtag('config', '{{ site.google_analytics }}');
+      </script>
+    {% endif %}
+    <meta charset="UTF-8">
+
+{% seo %}
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <meta name="theme-color" content="#157878">
+    <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
+    <link rel="stylesheet" href="{{ '/assets/css/style.css?v=' | append: site.github.build_revision | relative_url }}">
+  </head>
+  <body>
+    <a id="skip-to-content" href="#content">Skip to the content.</a>
+
+    <header class="page-header" role="banner">
+      <h1 class="project-name">{{ page.title | default: site.title | default: site.github.repository_name }}</h1>
+      <h2 class="project-tagline">{{ page.description | default: site.description | default: site.github.project_tagline }}</h2>
+      {% if site.github.is_project_page %}
+        <a href="{{ site.github.repository_url }}" class="btn">View on GitHub</a>
+      {% endif %}
+      {% if site.show_downloads %}
+        <a href="{{ site.github.zip_url }}" class="btn">Download .zip</a>
+        <a href="{{ site.github.tar_url }}" class="btn">Download .tar.gz</a>
+      {% endif %}
+    </header>
+
+    <main id="content" class="main-content" role="main">
+      {{ content }}
+
+      <footer class="site-footer">
+        {% if site.github.is_project_page %}
+          <span class="site-footer-owner"><a href="{{ site.github.repository_url }}">{{ site.github.repository_name }}</a> is maintained by <a href="{{ site.github.owner_url }}">{{ site.github.owner_name }}</a>.</span>
+        {% endif %}
+        <span class="site-footer-credits">This page was generated by <a href="https://pages.github.com">GitHub Pages</a>.</span>
+      </footer>
+    </main>
+  </body>
+</html>
diff --git a/css/main.css b/css/main.css
index a3527015..48159834 100644
--- a/css/main.css
+++ b/css/main.css
@@ -1,3 +1,6 @@
+--
+--
+
 @import "{{ site.theme }}";
 body {
     margin: 60px auto;
diff --git a/index.html b/index.html
index 4dbff95f..8cd1a990 100644
--- a/index.html
+++ b/index.html
@@ -2,7 +2,6 @@
 layout: default
 title: Cloud Retro
 ---
-@import "{{ site.theme }}";
 
 <div class="blurb">
 	<h1>Cloud Retro</h1>
