diff --git a/layouts/_default/single.html b/layouts/_default/single.html
index 1e228fd..264d86e 100644
--- a/layouts/_default/single.html
+++ b/layouts/_default/single.html
@@ -1,10 +1,11 @@
 {{ define "main" }}
 <!-- The "single" layout prints a single post -->
-<article class="post">
+{{- partial "lang-detection.html" . -}}
+<article class="post" {{ if .Scratch.Get "en_article_in_fr_site" }}lang="en"{{ end }}>
     <header>
         <h1>{{ .Title }}</h1>
-        {{- if .Params.description }}
-        <h4>{{ .Params.description }}</h4>
+        {{- with .Description }}
+        <h4>{{ . }}</h4>
         {{- end }}
         {{ partial "post-metadata.html" (dict "current" . "parent" .) -}}
     </header>
diff --git a/layouts/partials/head.html b/layouts/partials/head.html
index 994a342..2dee369 100644
--- a/layouts/partials/head.html
+++ b/layouts/partials/head.html
@@ -8,11 +8,24 @@
 <meta name="description" content="{{ .Params.description }}">
 {{- end }}
 
+<!-- Tell IE to use the Edge engine -->
 <meta name="X-UA-Compatible" content="IE=edge">
-<meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" name="viewport">
-<meta content="telephone=no" name="format-detection">
-<meta name="renderer" content="webkit">
-<meta name="theme-color" content="#ffffff">
+
+<!--
+  -- The viewport is the user's visible area of a web page.
+  -- The viewport varies with the device, and will be smaller on a mobile phone
+  -- than on a computer screen.
+  --
+  -- This meta tag let web designers take control over the viewport.
+  --
+  -- The width property controls the size of the viewport. It can be set to
+  -- the special value device-width, which is the width of the screen in CSS
+  -- pixels at a scale of 100%.
+  --
+  -- The initial-scale=1.0 part sets the initial zoom level when the page
+  -- is first loaded by the browser.
+  -->
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
 
 {{ template "_internal/opengraph.html" . }}
 {{ template "_internal/twitter_cards.html" . }}
@@ -25,16 +38,76 @@
   {{- partial "mathjax.html" . -}}
 {{- end -}}
 
+<!-- Deal with the case of english articles published in the french site -->
 {{- partial "lang-detection.html" . -}}
 {{- if .IsTranslated -}}
 {{- range .Translations -}}
 {{- if .Scratch.Get "en_article_in_fr_site" -}}
+<!--
+  -- It's an english article published in the french site
+  -- Tell Google not to index it and link to the original article.
+  -->
 <link rel="canonical" href="{{ .Permalink }}">
 <meta name="robots" content="noindex">
 {{ else }}
+<!-- Otherwise, just link to the available translations, if any. -->
 <link rel="alternate" hreflang="{{ .Language.Lang }}" href="{{ .Permalink }}" title="{{ .Language.LanguageName }}">
 {{ end -}}
 {{- end -}}
 {{- end -}}
 
+{{- if .IsHome }}
+<script type="application/ld+json">
+{
+    "@context": "http://schema.org",
+    "@type": "WebSite",
+    "name": "{{ .Site.Title | safeJS }}",
+    "url": "{{ .Site.BaseURL }}",
+    "description": "{{ .Site.Params.subtitle | safeJS }}",
+    "license": "Copyright {{ .Site.Home.Date.Year }} {{ .Site.Title | safeJS }}"
+}
+</script>
+{{ else if .IsPage -}}
+<script type="application/ld+json">
+{
+    "@context": "http://schema.org",
+    "@type": "BlogPosting",
+    "articleSection": "{{ .Section }}",
+    "name": "{{ .Title | safeJS }}",
+    "headline": "{{ .Title | safeJS }}",
+    "description": "{{ if .Description }}{{ .Description | safeJS }}{{ else }}{{ if .IsPage }}{{ .Summary | plainify | htmlUnescape | safeJS }}{{ end }}{{ end }}",
+    "inLanguage": {{ .Site.LanguageCode | default "en-us" }},
+    "isFamilyFriendly": "true",
+    "mainEntityOfPage": {
+        "@type": "WebPage",
+        "@id": "{{ .Permalink }}"
+    },
+    "author" : {
+        "@type": "Person",
+        "name": "{{ .Site.Title | safeJS }}"
+    },
+    "creator" : {
+        "@type": "Person",
+        "name": "{{ .Site.Title | safeJS }}"
+    },
+    "accountablePerson" : {
+        "@type": "Person",
+        "name": "{{ .Site.Title | safeJS }}"
+    },
+    "copyrightHolder" : "{{ .Site.Title | safeJS }}",
+    "copyrightYear" : "{{ .Site.Home.Date.Year }}",
+    "dateCreated": "{{ .Date.Format "2006-01-02T15:04:05.00Z" | safeHTML }}",
+    "datePublished": "{{ .PublishDate.Format "2006-01-02T15:04:05.00Z" | safeHTML }}",
+    "dateModified": "{{ .Lastmod.Format "2006-01-02T15:04:05.00Z" | safeHTML }}",
+    "publisher":{
+        "@type":"Person",
+        "name": {{ .Site.Title | safeJS }},
+        "url": {{ .Site.BaseURL }}
+    },
+    "url" : "{{ .Permalink }}",
+    "wordCount" : "{{ .WordCount }}"
+}
+</script>
+{{ end -}}
+
 </head>
diff --git a/static/css/itix.css b/static/css/itix.css
index de5d362..e8212d1 100644
--- a/static/css/itix.css
+++ b/static/css/itix.css
@@ -2,8 +2,7 @@
   /*
    * Theme colors
    */
-  --main-color-decimal: 25, 118, 210; /* main-color */
-  --main-color: var(--main-color-decimal);
+  --main-color: #1976d2;
   --main-background-color: #fcfcfc;
   --alternate-text-color: #145ca4;
   --main-text-color: #092949; /* 50% darker than main-color */
@@ -24,8 +23,6 @@
   /*
    * Layout
    */
-  --heading1-size: 30px;
-  --heading-diff: 3px;
   --menu-container-width: 25%;
   --toolbar-container-width: 25%;
 
@@ -165,34 +162,32 @@ h1, h2, h3 {
   line-height: 1.5em;
 }
 
+h1, h2, h3, h4, h5, h6 {
+  margin: 20px 0 20px 0;
+}
+
 h1 {
-  font-size: var(--heading1-size);
-  margin: 20px auto;
+  font-size: 30px;
 }
 
 h2 {
-  font-size: calc(var(--heading1-size) - 2 * var(--heading-diff));
-  margin: 20px auto;
+  font-size: 24px;
 }
 
 h3 {
-  font-size: calc(var(--heading1-size) - 3 * var(--heading-diff));
-  margin: 20px auto;
+  font-size: 21px;
 }
 
 h4 {
-  font-size: calc(var(--heading1-size) - 3 * var(--heading-diff));
-  padding: 20px auto;
+  font-size: 21px;
 }
 
 h5 {
-  font-size: calc(var(--heading1-size) - 3 * var(--heading-diff)) - 1;
-  padding: 10px auto;
+  font-size: 20px;
 }
 
 h6 {
-  font-size: calc(var(--heading1-size) - 3 * var(--heading-diff)) - 2;
-  padding: 10px auto;
+  font-size: 19px;
 }
 
 figure {
@@ -221,7 +216,6 @@ table {
 }
 
 button {
-  cursor: hand;
   cursor: pointer;
 }
 
@@ -424,7 +418,6 @@ article header h4 {
 .menu-head, .menu-link-list a, .menu-head:hover, .menu-link-list a:hover {
   display: block;
   text-decoration: none !important;
-  cursor: hand;
   cursor: pointer;
   border-right: 2px solid transparent;
 }
@@ -496,11 +489,11 @@ article header h4 {
  */
 .menu input.hamburger-menu {
   display: block;
-  width: 40px;
-  height: 32px;
+  width: 80px;
+  height: 72px;
   position: fixed;
-  top: 20px;
-  left: 20px;
+  top: 0px;
+  left: 0px;
   margin: 0;
 
   cursor: pointer;
@@ -608,7 +601,6 @@ article header h4 {
   align-items: center;
   justify-items: center;
   width: 64px;
-  cursor: hand;
   cursor: pointer;
   padding: 15px 0;
 }