diff --git a/docs/css/callout.css b/docs/css/callout.css
index 54af5044..650ffdcf 100644
--- a/docs/css/callout.css
+++ b/docs/css/callout.css
@@ -1,4 +1,3 @@
-
 :root {
   --ycr-bubble-bg-color: #92c6ce1a;
   --ycr-bubble-icon-color: #0d545f;
@@ -52,7 +51,7 @@
   margin: 0 0.2em;
   white-space: nowrap;
   font-weight: 300 !important;
-  color: var(--md-code-fg-color) !important;
+  color: var(--ycr-bubble-icon-color) !important;
   font-family: var(--md-code-font-family);
 }
 
@@ -61,12 +60,13 @@
   border: .075rem solid var(--ycr-bubble-fg-color--hover);
 }
 
-
 .ycr-regex code {
+  all: unset;
   color: var(--ycr-bubble-icon-color) !important;
-  text-decoration: none;
 }
 
- a.ycr-callout:focus code,a.ycr-callout:hover code {
-  background-color: transparent !important;
-}
+a.ycr-regex:focus code,
+a.ycr-regex:hover code {
+  background: inherit;
+  background-color: transparent;
+}
\ No newline at end of file
diff --git a/docs/js/navcolor.js b/docs/js/navcolor.js
index 8e651e22..13edf3e7 100644
--- a/docs/js/navcolor.js
+++ b/docs/js/navcolor.js
@@ -1,4 +1,4 @@
-document$.subscribe(async function(el) {
+document$.subscribe(async function (el) {
     const ul = el.querySelector('.md-tabs__list');
     if (!ul) {
         return;
@@ -13,20 +13,28 @@ document$.subscribe(async function(el) {
     }
     const href = a.getAttribute('href');
 
-    if (href.includes('/course-c/')) {
-        color = 'red'
+    config = {
+        'default': {
+            '/course-c/': 'red',
+            '/course-cpp/': 'cyan',
+            '/course-python/': 'green',
+            '/environment/': 'gray',
+            'default': 'red'
+        },
+        'slate': {
+            '/course-c/': 'black',
+            '/course-cpp/': 'cyan',
+            '/course-python/': 'green',
+            '/environment/': 'gray',
+            'default': 'black'
+        }
     }
-    else if (href.includes('/course-cpp/')) {
-        color = 'cyan'
-    }
-    else if (href.includes('/course-python/')) {
-        color = 'green'
-    }
-    else if (href.includes('/environment/')) {
-        color = 'gray'
-    }
-    else {
-        color = 'red'
+
+    let scheme = document.querySelector('body').getAttribute('data-md-color-scheme');
+    for (let key in config[scheme]) {
+        if (href.includes(key)) {
+            color = config[scheme][key];
+            document.querySelector('body').setAttribute('data-md-color-primary', color);
+        }
     }
-    document.querySelector('body').setAttribute('data-md-color-primary', color);
 });
\ No newline at end of file
diff --git a/hooks/latex/renderer.py b/hooks/latex/renderer.py
index 761bc531..474fa5e6 100644
--- a/hooks/latex/renderer.py
+++ b/hooks/latex/renderer.py
@@ -109,11 +109,11 @@ def __init__(self, output_path=Path("build"), config={}):
             self.render_hr,
             self.render_br,
             # Prior escaping LaTeX special characters
+            self.render_regex,
             self.render_codeblock,
             self.render_codeinline,
             self.render_math,
             self.render_math_block,
-            self.render_regex,
             self.render_unicode,
             self.render_navigable_string,
             self.render_emoji,
@@ -284,7 +284,11 @@ def render_regex(self, soup: Tag, **kwargs):
             class="ycr-regex" target="_blank">/.../</a>
         """
         for a in soup.find_all("a", class_=["ycr-regex"]):
-            code = self.get_safe_text(a)
+            if code_tag := a.find("code"):
+                code = self.get_safe_text(code_tag)
+            else:  # Fallback to text
+                code = self.get_safe_text(a)
+
             code = code.replace("&", "\\&").replace("#", "\\#")
             self.apply(a, "regex", code, url=safe_quote(a.get("href", "")))
         return soup
diff --git a/hooks/regex.py b/hooks/regex.py
index be990113..2ad986b0 100644
--- a/hooks/regex.py
+++ b/hooks/regex.py
@@ -42,7 +42,6 @@ def handleMatch(self, m, data):
         el.set("class", classes)
         el.set("target", target)
         el.text = f"`{regex}`"
-
         return el, m.start(0), m.end(0)
 
 
diff --git a/hooks/unicode.py b/hooks/unicode.py
index f593654f..a42ed332 100644
--- a/hooks/unicode.py
+++ b/hooks/unicode.py
@@ -3,29 +3,32 @@
 
 U+XXXX with a tag
 """
+
 from xml.etree import ElementTree as etree
+
 from markdown.extensions import Extension
 from markdown.inlinepatterns import InlineProcessor
 
-BASE_URL = 'https://symbl.cc/fr/'
+BASE_URL = "https://symbl.cc/fr/"
+
 
 class UnicodeProcessor(InlineProcessor):
     def handleMatch(self, m, data):
         unicode_code = m.group(1)
         el = etree.Element("a")
-        el.set('href', f'{BASE_URL}/{unicode_code}')
-        el.set('class', 'ycr-callout ycr-unicode')
-        el.set('target', '_blank')
-        el.text = f'U+{unicode_code}'
+        el.set("href", f"{BASE_URL}/{unicode_code}")
+        el.set("class", "ycr-callout ycr-unicode")
+        el.set("target", "_blank")
+        el.text = f"{unicode_code}"
         return el, m.start(0), m.end(0)
 
 
 class UnicodeExtension(Extension):
     def extendMarkdown(self, md):
-        UNICODE_RE = r'\bU\+([0-9A-F]{4,5})\b'
+        UNICODE_RE = r"\bU\+([0-9A-F]{4,5})\b"
         unicode_pattern = UnicodeProcessor(UNICODE_RE, md)
-        md.inlinePatterns.register(unicode_pattern, 'unicode', 175)
+        md.inlinePatterns.register(unicode_pattern, "unicode", 175)
 
 
 def on_config(config):
-    config['markdown_extensions'].append(UnicodeExtension())
\ No newline at end of file
+    config["markdown_extensions"].append(UnicodeExtension())
diff --git a/mkdocs.yml b/mkdocs.yml
index 7d2b9220..f18be6f4 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -5,7 +5,9 @@ site_name: Le C pour l'ingénieur
 site_url: https://heig-tin-info.github.io/handbook/
 site_author: Yves Chevallier
 site_description: |
-  Un manuel pour apprendre le langage C en partant de zéro.
+  Cours d'informatique pour les étudiants en ingénierie du département des
+  technologies industrielles à la HEIG-VD. Ce cours concerne le langage C et
+  les outils associés.
 copyright: >
   Copyright &copy; 2019 - 2024 HEIG-VD Yves Chevallier
   <a href="#__consent">Changer les paramètres des cookies</a>
@@ -15,7 +17,10 @@ repo_name: heig-tin-info/handbook
 repo_url: https://github.com/heig-tin-info/handbook
 edit_uri: edit/master/docs/
 docs_dir: !ENV [DOCS, docs]
-
+validation:
+  omitted_files: warn
+  absolute_links: warn
+  unrecognized_links: warn
 theme:
   name: material
   language: fr
@@ -49,16 +54,16 @@ theme:
     - toc.follow
   palette:
     - scheme: default
-      #media: "(prefers-color-scheme: light)"
+      media: "(prefers-color-scheme: light)"
       toggle:
         icon: material/lightbulb
         name: Switch to dark mode
       primary: red
       accent: light blue
     - scheme: slate
-      #media: "(prefers-color-scheme: dark)"
-      primary: red
-      accent: light blue
+      media: "(prefers-color-scheme: dark)"
+      primary: black
+      accent: lime
       toggle:
         icon: material/lightbulb-outline
         name: Switch to light mode
@@ -131,7 +136,7 @@ plugins:
 markdown_extensions:
   - toc:
       toc_depth: 3
-      permalink: true
+      permalink: "¤"
   - pymdownx.betterem:
       smart_enable: all
   - tables
diff --git a/overrides/home.html b/overrides/home.html
index 8c17d0c0..1696f039 100644
--- a/overrides/home.html
+++ b/overrides/home.html
@@ -73,7 +73,7 @@
       top: 0;
       right: 0;
       width: 40rem;
-      position:absolute;
+      position: absolute;
       transform: translateX(5rem);
       height: 100vh;
       overflow: hidden;
@@ -93,20 +93,21 @@
     <div class="mdx-hero">
       <!-- Hero content -->
       <div class="mdx-hero__content">
-        <h1>Un cours d'informatique pour ingénieur</h1>
+        <h1>Un cours d'informatique pour ingénieurs</h1>
         <p>{{ config.site_description }}.</p>
         <a href="{{ page.next_page.url | url }}" title="{{ page.next_page.title | e }}"
           class="md-button md-button--primary">
-          Cours
+          Cours en ligne
         </a>
-        <a href="{{ 'tools/' | url }}" title="Configuration de votre environnement de travail" class="md-button">
-          Environnement de travail
+        <a href="https://github.com/heig-tin-info/handbook/releases/latest/download/output-print.pdf"
+          title="Télécharger le PDF" class="md-button">
+          Télécharger le PDF
         </a>
       </div>
     </div>
     <!-- Hero image -->
     <div class="mdx-hero__image">
-    <img src="assets/images/hero.png" alt="" draggable="false">
+      <img src="assets/images/hero.png" alt="" draggable="false">
     </div>
   </div>
 </section>
@@ -116,4 +117,4 @@ <h1>Un cours d'informatique pour ingénieur</h1>
 {% block content %}{% endblock %}
 
 <!-- Application footer -->
-{% block footer %}{% endblock %}
+{% block footer %}{% endblock %}
\ No newline at end of file