diff --git a/package-lock.json b/package-lock.json
index 15bca63..4692d93 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,6 +10,7 @@
       "dependencies": {
         "@astrojs/node": "^10.1.0",
         "@astrojs/vue": "^6.0.1",
+        "@fontsource-variable/roboto-condensed": "^5.2.8",
         "@tailwindcss/vite": "^4.2.4",
         "@types/d3": "^7.4.3",
         "astro": "^6.3.1",
@@ -1064,6 +1065,15 @@
         "node": ">=18"
       }
     },
+    "node_modules/@fontsource-variable/roboto-condensed": {
+      "version": "5.2.8",
+      "resolved": "https://registry.npmjs.org/@fontsource-variable/roboto-condensed/-/roboto-condensed-5.2.8.tgz",
+      "integrity": "sha512-aIZ2kYSoJHkTI4z8x/PRgKX6Zb9TTtSE/u+fUYeiwL+5trP9rhYYEEeNjRttaMqRgoDHcSueArdRZ43wf/i2Kw==",
+      "license": "OFL-1.1",
+      "funding": {
+        "url": "https://github.com/sponsors/ayuhito"
+      }
+    },
     "node_modules/@img/colour": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/@img/colour/-/colour-1.1.0.tgz",
diff --git a/package.json b/package.json
index 3f9eb4a..d6746a9 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,7 @@
   "dependencies": {
     "@astrojs/node": "^10.1.0",
     "@astrojs/vue": "^6.0.1",
+    "@fontsource-variable/roboto-condensed": "^5.2.8",
     "@tailwindcss/vite": "^4.2.4",
     "@types/d3": "^7.4.3",
     "astro": "^6.3.1",
diff --git a/src/components/astro/SiteHeader.astro b/src/components/astro/SiteHeader.astro
index 38fa6b6..64361b5 100644
--- a/src/components/astro/SiteHeader.astro
+++ b/src/components/astro/SiteHeader.astro
@@ -1,52 +1,80 @@
 ---
-// SiteHeader.astro - V1.2-M : bandeau header pleine largeur identite site
-// Palette terre figee : papier #FAFAF7, encre #0F172A, encre douce #475569
-// Composition retenue : 2 lignes hierarchique
-//   ligne 1 : "Trans-Former" wordmark dominant (semibold tracking serre)
-//   ligne 2 : "Jules Neny" + baseline italique cote a cote (separateur point median)
-// Rationale : le wordmark domine sans ecraser ; la baseline reste lisible ;
-// composition adaptee a un manifeste (hierarchie typographique forte).
-// Hauteur : ~64px desktop / ~48px mobile (compacte)
-// Baseline raccourcie mobile : "architecture politique du vivant"
+// SiteHeader.astro - V1.3-C : header 1 ligne fine, liens cliquables, phrase intention Roboto Condensed
+// Palette V1.3 figee : papier #FAFAF7, encre #0F172A, encre douce #475569, border #E5E7EB
+// Composition :
+//   Desktop (>= md) : 1 ligne ~44px - Trans-Former | Jules Neny | architecture d'ecologie politique  [phrase intention right-aligned, Roboto Condensed]
+//   Mobile (< md)   : 2 lignes compactes - ligne 1 Trans-Former / ligne 2 Jules Neny . AEP (cliquables) - phrase intention masquee
+// Liens :
+//   Trans-Former -> /
+//   Jules Neny   -> /a-propos
+//   architecture d'ecologie politique -> https://aep.trans-former.fr (same-tab, site frere coherent)
+// Typo phrase intention : Roboto Condensed Variable @fontsource (weight 400, font-stretch 75%)
+import '@fontsource-variable/roboto-condensed/wght.css';
 ---
 <header
   class="site-header w-full border-b border-[#E5E7EB] bg-[#FAFAF7] text-[#0F172A] px-4 md:px-6 flex items-center"
   role="banner"
 >
-  <a
-    href="/"
-    class="flex flex-col md:flex-row md:items-baseline gap-x-3 gap-y-0 no-underline text-[#0F172A] hover:text-[#0F172A]"
-    aria-label="trans-former.fr - retour accueil"
+  <!-- Bloc identite (gauche) -->
+  <nav
+    class="flex flex-col md:flex-row md:items-baseline gap-x-2 gap-y-0.5 flex-shrink-0"
+    aria-label="identite site"
   >
-    <!-- Ligne 1 : wordmark dominant -->
-    <span
-      class="font-semibold tracking-tight text-[#0F172A] text-[17px] md:text-[20px] leading-none"
+    <!-- Ligne 1 desktop = wordmark inline ; mobile = ligne dediee -->
+    <a
+      href="/"
+      class="font-semibold tracking-tight text-[#0F172A] hover:text-[#0F172A] text-[15px] md:text-[16px] leading-none no-underline hover:underline underline-offset-2 decoration-1"
+      aria-label="trans-former.fr - accueil"
     >
       Trans-Former
-    </span>
+    </a>
 
-    <!-- Ligne 2 (desktop : inline ; mobile : sous wordmark) : Jules Neny + baseline -->
-    <span class="flex items-baseline gap-2 text-[#475569] leading-none">
-      <span class="text-[11px] md:text-[13px]">Jules Neny</span>
+    <!-- Bloc secondaire : Jules Neny . AEP (mobile : ligne 2 ; desktop : inline) -->
+    <span class="flex items-baseline gap-1.5 text-[#475569] leading-none">
+      <span class="text-[#94A3B8] hidden md:inline" aria-hidden="true">·</span>
+      <a
+        href="/a-propos"
+        class="text-[12px] md:text-[13px] text-[#475569] hover:text-[#0F172A] no-underline hover:underline underline-offset-2 decoration-1"
+      >
+        Jules Neny
+      </a>
       <span class="text-[#94A3B8]" aria-hidden="true">·</span>
-      <!-- Baseline longue : desktop / Baseline courte : mobile -->
-      <span class="italic text-[11px] md:text-[13px] hidden sm:inline">
-        architecture d'ecologie politique
-      </span>
-      <span class="italic text-[11px] inline sm:hidden">
-        architecture politique du vivant
-      </span>
+      <a
+        href="https://aep.trans-former.fr"
+        class="text-[12px] md:text-[13px] text-[#475569] hover:text-[#0F172A] no-underline hover:underline underline-offset-2 decoration-1"
+      >
+        architecture d'écologie politique
+      </a>
     </span>
-  </a>
+  </nav>
+
+  <!-- Phrase intention (droite, desktop only) - Roboto Condensed allongee -->
+  <p
+    class="intention hidden md:block ml-auto pl-6 text-right text-[#475569] text-[11px] leading-tight max-w-[55%]"
+  >
+    Comment créer une pratique systémique, créative et collective de transformation sociale pour répondre à l'effondrement et restaurer notre capacité à habiter la Terre dans l'Anthropocène&nbsp;?
+  </p>
 </header>
 
 <style>
   .site-header {
-    height: 48px;
+    height: 44px;
   }
-  @media (min-width: 768px) {
+  @media (max-width: 767px) {
     .site-header {
-      height: 64px;
+      height: auto;
+      min-height: 48px;
+      padding-top: 6px;
+      padding-bottom: 6px;
     }
   }
+  /* Phrase intention : Roboto Condensed Variable, font-stretch 75% (allongement vertical condense)
+     Cantonnee a .intention pour eviter contagion stack Inter */
+  .intention {
+    font-family: 'Roboto Condensed Variable', 'Roboto Condensed', sans-serif;
+    font-weight: 400;
+    font-stretch: 75%;
+    font-style: italic;
+    letter-spacing: 0.01em;
+  }
 </style>