diff --git a/src/index.html b/src/index.html
index d9a3eb8..f168c82 100644
--- a/src/index.html
+++ b/src/index.html
@@ -20,6 +20,8 @@
     </div>
   </div>
 
+  <div id="app-content">
+
   <div id="view-home">
     <h1 class="home-title">Pena</h1>
     <div class="home-buttons">
@@ -33,21 +35,27 @@
   </div>
 
   <div id="view-reader" class="hidden">
-    <aside id="sidebar" class="sidebar">
-      <!-- contenu généré par JS -->
-    </aside>
+    <div class="sidebar">
+      <aside id="sidebar" class="sidebar__scroll">
+        <!-- contenu généré par JS -->
+      </aside>
+      <div class="sidebar__footer">
+        <button id="btn-customize-css" class="btn-customize-css">
+          <svg class="btn-customize-css__icon" width="15" height="15" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <path d="M15.5 8.5H15.51M10.5 7.5H10.51M7.5 11.5H7.51M12 21C7.02944 21 3 16.9706 3 12C3 7.02944 7.02944 3 12 3C16.9706 3 21 7.02944 21 12C21 13.6569 19.6569 15 18 15H17.4C17.0284 15 16.8426 15 16.6871 15.0246C15.8313 15.1602 15.1602 15.8313 15.0246 16.6871C15 16.8426 15 17.0284 15 17.4V18C15 19.6569 13.6569 21 12 21ZM16 8.5C16 8.77614 15.7761 9 15.5 9C15.2239 9 15 8.77614 15 8.5C15 8.22386 15.2239 8 15.5 8C15.7761 8 16 8.22386 16 8.5ZM11 7.5C11 7.77614 10.7761 8 10.5 8C10.2239 8 10 7.77614 10 7.5C10 7.22386 10.2239 7 10.5 7C10.7761 7 11 7.22386 11 7.5ZM8 11.5C8 11.7761 7.77614 12 7.5 12C7.22386 12 7 11.7761 7 11.5C7 11.2239 7.22386 11 7.5 11C7.77614 11 8 11.2239 8 11.5Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+          </svg>
+          Personnaliser le CSS
+        </button>
+        <button id="btn-back" class="btn-back">← Accueil</button>
+      </div>
+    </div>
     <div id="content" class="content">
       <!-- contenu généré par JS -->
     </div>
-    <button id="btn-customize-css" class="btn-customize-css">
-      <svg class="btn-customize-css__icon" width="15" height="15" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
-        <path d="M15.5 8.5H15.51M10.5 7.5H10.51M7.5 11.5H7.51M12 21C7.02944 21 3 16.9706 3 12C3 7.02944 7.02944 3 12 3C16.9706 3 21 7.02944 21 12C21 13.6569 19.6569 15 18 15H17.4C17.0284 15 16.8426 15 16.6871 15.0246C15.8313 15.1602 15.1602 15.8313 15.0246 16.6871C15 16.8426 15 17.0284 15 17.4V18C15 19.6569 13.6569 21 12 21ZM16 8.5C16 8.77614 15.7761 9 15.5 9C15.2239 9 15 8.77614 15 8.5C15 8.22386 15.2239 8 15.5 8C15.7761 8 16 8.22386 16 8.5ZM11 7.5C11 7.77614 10.7761 8 10.5 8C10.2239 8 10 7.77614 10 7.5C10 7.22386 10.2239 7 10.5 7C10.7761 7 11 7.22386 11 7.5ZM8 11.5C8 11.7761 7.77614 12 7.5 12C7.22386 12 7 11.7761 7 11.5C7 11.2239 7.22386 11 7.5 11C7.77614 11 8 11.2239 8 11.5Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
-      </svg>
-      Personnaliser le CSS
-    </button>
-    <button id="btn-back" class="btn-back">← Accueil</button>
   </div>
 
+  </div><!-- #app-content -->
+
   <!-- Modale CSS -->
   <div id="css-modal-overlay" class="css-modal-overlay hidden">
     <div class="css-modal">
diff --git a/src/style.css b/src/style.css
index 1286ed1..e88fcfe 100644
--- a/src/style.css
+++ b/src/style.css
@@ -8,7 +8,16 @@ body {
   color: #222;
   text-rendering: optimizeLegibility;
   -webkit-font-smoothing: antialiased;
-  overflow-x: hidden;
+  overflow: hidden;
+}
+
+#app-content {
+  position: fixed;
+  top: 36px;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  overflow-y: auto;
 }
 
 /* ── Titlebar ── */
@@ -78,8 +87,7 @@ body {
   flex-direction: column;
   align-items: center;
   justify-content: center;
-  height: 100vh;
-  padding-top: 36px;
+  height: 100%;
   background: #1a1b2e;
 }
 
@@ -206,6 +214,23 @@ body {
   z-index: 99;
   overflow: hidden;
 }
+
+.sidebar__scroll {
+  flex: 1;
+  min-height: 0;
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+}
+
+.sidebar__footer {
+  flex-shrink: 0;
+  display: flex;
+  flex-direction: column;
+  padding: 4px 0 8px;
+  border-top: 1px solid rgba(255,255,255,0.06);
+}
+
 .sidebar__title-block {
   margin: 32px 24px 8px;
   flex-shrink: 0;
@@ -233,7 +258,7 @@ body {
 .sidebar__menu {
   list-style: none;
   margin: 0;
-  padding: 8px 0 48px 0;
+  padding: 8px 0;
   flex: 1;
   overflow-y: auto;
 }
@@ -379,12 +404,12 @@ body {
 /* ── Content ── */
 .content {
   margin-left: 264px;
-  padding-top: 84px;
+  padding-top: 48px;
   padding-right: 72px;
   padding-bottom: 96px;
   padding-left: 72px;
   max-width: 1080px;
-  min-height: 100vh;
+  min-height: 100%;
   background: #fff;
 }
 
@@ -459,11 +484,8 @@ body {
 
 /* ── Customize CSS button ── */
 .btn-customize-css {
-  position: fixed;
-  bottom: 60px;
-  left: 12px;
-  width: 240px;
-  z-index: 100;
+  width: calc(100% - 24px);
+  margin: 4px 12px 0;
   background: transparent;
   color: rgba(255,255,255,0.7);
   border: 1px solid rgba(255,255,255,0.15);
@@ -626,11 +648,7 @@ body {
 
 /* ── Back button ── */
 .btn-back {
-  position: fixed;
-  bottom: 24px;
-  left: 0;
-  width: 264px;
-  z-index: 98;
+  width: 100%;
   background: transparent;
   color: rgba(255,255,255,0.45);
   border: none;
@@ -641,7 +659,6 @@ body {
   cursor: pointer;
   text-align: left;
   transition: color 0.2s;
-  z-index: 100;
 }
 .btn-back:hover { color: #ff5577; }
 
@@ -651,7 +668,7 @@ body {
     left: -300px;
     transition: left 0.2s cubic-bezier(0.09, 0.46, 0.45, 0.94);
   }
-  .content { margin-left: 0; padding: 68px 24px 64px; }
+  .content { margin-left: 0; padding: 32px 24px 64px; }
 }
 @media screen and (max-width: 540px) {
   .content { padding: 68px 16px 48px; }
diff --git a/src/ui/reader.js b/src/ui/reader.js
index 9b74170..15df362 100644
--- a/src/ui/reader.js
+++ b/src/ui/reader.js
@@ -4,6 +4,37 @@ const win = window.__TAURI__.window.getCurrentWindow();
 const titlebarTitle = document.getElementById('titlebar-title');
 const content = document.querySelector('#content');
 
+function resolveRelativePath(currentFile, href) {
+  const sep = currentFile.includes('\\') ? '\\' : '/';
+  const dir = currentFile.split(sep).slice(0, -1).join(sep);
+  const parts = [...dir.split(sep), ...href.split('/')];
+  const resolved = [];
+  for (const part of parts) {
+    if (part === '..') resolved.pop();
+    else if (part !== '.') resolved.push(part);
+  }
+  return resolved.join(sep);
+}
+
+function wireLinks(filePath, mode, sidebarEl) {
+  content.querySelectorAll('a[href]').forEach(a => {
+    const href = a.getAttribute('href');
+    if (!href || href.startsWith('#')) return;
+
+    if (/^https?:\/\//.test(href)) {
+      a.setAttribute('target', '_blank');
+      a.setAttribute('rel', 'noopener noreferrer');
+      return;
+    }
+
+    a.addEventListener('click', async e => {
+      e.preventDefault();
+      const resolved = resolveRelativePath(filePath, href);
+      await loadPage(resolved, mode, sidebarEl);
+    });
+  });
+}
+
 export async function loadPage(filePath, mode, sidebarEl) {
   try {
     const html = await convertFile(filePath);
@@ -27,6 +58,8 @@ export async function loadPage(filePath, mode, sidebarEl) {
         }
       }
     }
+
+    wireLinks(filePath, mode, sidebarEl);
   } catch (err) {
     content.innerHTML = `<p class="error">Impossible de charger le fichier : ${err}</p>`;
   }