diff --git a/app/components/syntax/Navigation.tsx b/app/components/syntax/Navigation.tsx
index f543071..1ae09f1 100644
--- a/app/components/syntax/Navigation.tsx
+++ b/app/components/syntax/Navigation.tsx
@@ -2,7 +2,7 @@ import { ChevronDownIcon, ChevronUpIcon } from "@heroicons/react/24/solid";
 import { usePageContext } from "vike-react/usePageContext";
 import { Link } from "@/components/common/Link";
 import { navigation } from "@/lib/navigation";
-import { useState } from "react";
+import { useEffect, useState } from "react";
 import clsx from "clsx";
 
 type NavigationItemProps = {
@@ -50,50 +50,101 @@ function NavigationItem(props: NavigationItemProps) {
       {isOpened && (
         <ul
           role="list"
-          className="mt-2 space-y-2 border-l-2 border-slate-100 lg:mt-4 lg:space-y-4 lg:border-slate-200 dark:border-slate-800 mb-4"
+          className="!mt-0 ml-2 space-y-2 border-l-2 border-slate-100 lg:mt-4 lg:space-y-4 lg:border-slate-200 dark:border-slate-800 mb-4"
         >
           {props.section.links.map((link) => (
             <li key={link.href} className="relative">
+              <NavigationSubItem
+                link={link}
+                onLinkClick={props.onLinkClick}
+                isOpened={link.href === urlPathname || link.subitems?.some((subitem) => subitem.href === urlPathname)}
+              />
+            </li>
+          ))}
+        </ul>
+      )}
+    </>
+  );
+}
+
+type NavigationSubItemProps = {
+  link: (typeof navigation)[number]["links"][number];
+  onLinkClick?: React.MouseEventHandler<HTMLAnchorElement>;
+  isOpened?: boolean;
+};
+
+function NavigationSubItem(props: NavigationSubItemProps) {
+  const [isOpened, setIsOpened] = useState(props.isOpened);
+  const { urlPathname } = usePageContext();
+
+  useEffect(() => {
+    setIsOpened(
+      props.link.href === urlPathname || props.link.subitems?.some((subitem) => subitem.href === urlPathname),
+    );
+  }, [urlPathname, props.link]);
+
+  return (
+    <>
+      <span className="pl-2 flex cursor-pointer">
+        {props.link.subitems.length > 0 && (
+          <span
+            role="button"
+            tabIndex={0}
+            onKeyDown={(e) => {
+              if (e.key === "Enter" || e.key === " ") {
+                setIsOpened((prev) => !prev);
+                e.preventDefault();
+              }
+            }}
+            onClick={() => setIsOpened((prev) => !prev)}
+          >
+            {isOpened ? (
+              <ChevronUpIcon className="inline-block h-5 w-5 text-slate-400" />
+            ) : (
+              <ChevronDownIcon className="inline-block h-5 w-5 text-slate-400" />
+            )}
+            <span className="sr-only">{isOpened ? "Masquer" : "Afficher"}</span>
+          </span>
+        )}
+
+        <Link
+          href={props.link.href}
+          onClick={props.onLinkClick}
+          className={clsx(
+            "block pl-2 w-full before:pointer-events-none before:absolute before:-left-1 before:h-1.5 before:w-1.5 before:rounded-full",
+            { "before:top-1/2 before:-translate-y-1/2": !props.link.subitems },
+            { "before:top-3 before:-translate-y-1/2 font-semibold": props.link.subitems },
+            props.link.href !== urlPathname && "before:hidden",
+            isOpened
+              ? "text-violet-500 before:bg-violet-500"
+              : "text-slate-500 before:bg-slate-300 hover:text-slate-600 hover:before:block dark:text-slate-400 dark:before:bg-slate-700 dark:hover:text-slate-300",
+          )}
+        >
+          {props.link.title}
+          {props.link.subitems.length > 0 && (
+            <span className="text-slate-400 dark:text-slate-500"> ({props.link.subitems.length})</span>
+          )}
+        </Link>
+      </span>
+      {props.link.subitems && isOpened && (
+        <ul
+          role="list"
+          className="ml-4 border-l-2 border-slate-100 lg:space-y-1 lg:border-slate-200 dark:border-slate-800 mb-4"
+        >
+          {props.link.subitems.map((subitem) => (
+            <li key={subitem.href} className="relative">
               <Link
-                href={link.href}
+                href={subitem.href}
                 onClick={props.onLinkClick}
                 className={clsx(
-                  "block w-full pl-3.5 before:pointer-events-none before:absolute before:-left-1 before:h-1.5 before:w-1.5 before:rounded-full",
-                  { "before:top-1/2 before:-translate-y-1/2": !link.subitems },
-                  { "before:top-3 before:-translate-y-1/2": link.subitems },
-                  link.href === urlPathname || link.subitems?.some((subitem) => subitem.href === urlPathname)
+                  "block w-full pl-3.5 before:pointer-events-none before:absolute before:top-1/2 before:-left-1 before:h-1.5 before:w-1.5 before:-translate-y-1/2 before:rounded-full",
+                  subitem.href === urlPathname
                     ? "font-semibold text-violet-500 before:bg-violet-500"
                     : "text-slate-500 before:hidden before:bg-slate-300 hover:text-slate-600 hover:before:block dark:text-slate-400 dark:before:bg-slate-700 dark:hover:text-slate-300",
                 )}
               >
-                {link.title}
-                {link.subitems.length > 0 && (
-                  <span className="text-slate-400 dark:text-slate-500"> ({link.subitems.length})</span>
-                )}
+                {subitem.title}
               </Link>
-              {link.subitems && (
-                <ul
-                  role="list"
-                  className="ml-4 border-l-2 border-slate-100 lg:space-y-1 lg:border-slate-200 dark:border-slate-800 mb-4"
-                >
-                  {link.subitems.map((subitem) => (
-                    <li key={subitem.href} className="relative">
-                      <Link
-                        href={subitem.href}
-                        onClick={props.onLinkClick}
-                        className={clsx(
-                          "block w-full pl-3.5 before:pointer-events-none before:absolute before:top-1/2 before:-left-1 before:h-1.5 before:w-1.5 before:-translate-y-1/2 before:rounded-full",
-                          subitem.href === urlPathname
-                            ? "font-semibold text-violet-500 before:bg-violet-500"
-                            : "text-slate-500 before:hidden before:bg-slate-300 hover:text-slate-600 hover:before:block dark:text-slate-400 dark:before:bg-slate-700 dark:hover:text-slate-300",
-                        )}
-                      >
-                        {subitem.title}
-                      </Link>
-                    </li>
-                  ))}
-                </ul>
-              )}
             </li>
           ))}
         </ul>
diff --git a/app/lib/navigation.ts b/app/lib/navigation.ts
index da9785d..3add153 100644
--- a/app/lib/navigation.ts
+++ b/app/lib/navigation.ts
@@ -11,9 +11,14 @@ export type NavigationSection = {
   links: NavigationLink[];
 };
 
+export type NavigationOG = Partial<{
+  image: string;
+}>;
+
 export type NavigationLink = {
   title: string;
   href: string;
+  og?: NavigationOG;
   subitems: NavigationSubItem[];
 };
 
@@ -101,6 +106,7 @@ export const navigation: NavigationSection[] = [
       {
         title: "Merise",
         href: "/docs/merise",
+        og: { image: "/merise/og.webp" },
         subitems: [
           { title: "Introduction", href: "/docs/merise" },
           { title: "Dictionnaire de données", href: "/docs/merise/dictionnaire-de-donnees" },
@@ -112,3 +118,16 @@ export const navigation: NavigationSection[] = [
     ],
   },
 ];
+
+export function findNavigationLink(namespace: string, href: string) {
+  const currentUrl = `/${namespace}/${href}`.replace(/\/+/g, "/").replace(/\/$/, "");
+
+  const links = navigation.flatMap((section) => section.links);
+  const subitems = links.flatMap((link) => link.subitems);
+  const allLinks = new Set([...links, ...subitems]);
+  const foundLink = Array.from(allLinks).find((link) => link.href === currentUrl);
+
+  console.log({ allLinks, currentUrl });
+
+  return foundLink;
+}
diff --git a/app/pages/+Head.tsx b/app/pages/+Head.tsx
index 429fd8a..48371af 100644
--- a/app/pages/+Head.tsx
+++ b/app/pages/+Head.tsx
@@ -1,4 +1,4 @@
-import logoUrl from "../assets/logo.svg";
+import logoUrl from "@/assets/logo.svg";
 
 export default function HeadDefault() {
   return (
diff --git a/app/pages/+config.ts b/app/pages/+config.ts
index 80c7eee..ac63eef 100644
--- a/app/pages/+config.ts
+++ b/app/pages/+config.ts
@@ -23,6 +23,8 @@ export default {
     class: "flex min-h-full bg-white dark:bg-slate-900",
   },
 
+  image: null,
+
   // prerender: true,
   prefetchStaticAssets: "hover",
 
diff --git a/app/pages/docs/+data.ts b/app/pages/docs/+data.ts
index 68da945..abfc020 100644
--- a/app/pages/docs/+data.ts
+++ b/app/pages/docs/+data.ts
@@ -1,6 +1,7 @@
 import type { PageContext } from "vike/types";
 
 import { snippetsService } from "@/services/SnippetsService";
+import { findNavigationLink } from "@/lib/navigation";
 import { docsService } from "@/services/DocsService";
 import { readingTime } from "reading-time-estimator";
 import { useConfig } from "vike-react/useConfig";
@@ -15,6 +16,7 @@ export async function data(pageContext: PageContext) {
   const { key } = pageContext.routeParams;
 
   const doc = await docsService.getDoc("docs", key);
+  const link = findNavigationLink("docs", key);
 
   if (!doc) {
     throw render(404);
@@ -25,6 +27,7 @@ export async function data(pageContext: PageContext) {
   config({
     title: buildTitle(doc.title),
     description: doc.description,
+    image: link?.og?.image || "notfound",
   });
 
   docsService.transform(doc);
diff --git a/app/public/merise/og.webp b/app/public/merise/og.webp
new file mode 100644
index 0000000..8dfbe5e
Binary files /dev/null and b/app/public/merise/og.webp differ