diff --git a/_layouts/defaults.html b/_layouts/defaults.html
new file mode 100644
index 0000000..6929e73
--- /dev/null
+++ b/_layouts/defaults.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html lang="{{ site.lang | default: "en-US" }}">
+  <head>
+    <meta charset="UTF-8">
+
+{% seo %}
+    <link rel="preconnect" href="https://fonts.gstatic.com">
+    <link rel="preload" href="https://fonts.googleapis.com/css?family=Open+Sans:400,700&display=swap" as="style" type="text/css" crossorigin>
+    <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 }}">
+    {% include head-custom.html %}
+  </head>
+  <body>
+    <a id="skip-to-content" href="#content">Skip to the content.</a>
+
+    <main id="content" class="main-content" role="main">
+      {{ content }}
+
+    </main>
+  </body>
+</html>
