diff --git a/src/views/Portfolio.svelte b/src/views/Portfolio.svelte
index f9c8ba4..7308abb 100644
--- a/src/views/Portfolio.svelte
+++ b/src/views/Portfolio.svelte
@@ -122,16 +122,22 @@
 
   <!-- Sidebar navigation (extrême droite) -->
   <nav class="portfolio-nav" aria-label="Projets">
-    {#each projects as project, i}
-      <button
-        class="portfolio-nav-item"
-        class:active={i === currentIndex}
-        onclick={() => { currentIndex = i; setAnchor(i) }}
-      >
-        <img src={project.thumbnail} alt={project.title} />
-        <span class="portfolio-nav-number">{String(i + 1).padStart(2, '0')}</span>
-      </button>
-    {/each}
+    <ul role="list">
+      {#each projects as project, i}
+        <li class="portfolio-nav-item" class:active={i === currentIndex}>
+          <button
+            aria-current={i === currentIndex ? 'true' : undefined}
+            aria-label={project.title}
+            onclick={() => { currentIndex = i; setAnchor(i) }}
+          >
+            {#if project.thumbnail?.length}
+              <img src={project.thumbnail} alt="" />
+            {/if}
+            <span class="portfolio-nav-number" aria-hidden="true">{String(i + 1).padStart(2, '0')}</span>
+          </button>
+        </li>
+      {/each}
+    </ul>
   </nav>
 </section>
 
@@ -182,6 +188,7 @@
 
   .portfolio-text h2 {
     font-size: var(--font-size-title-main);
+    font-weight: 700;
     text-transform: uppercase;
     line-height: 1.1;
   }
@@ -215,6 +222,11 @@
   }
 
   /* Sidebar navigation */
+  .portfolio-nav ul {
+    list-style: none;
+    display: contents;
+  }
+
   .portfolio-nav {
     grid-area: 4/17 / span 14 / span 4;
     padding-right: 8rem;
@@ -226,7 +238,11 @@
     gap: 1rem;
   }
 
-  .portfolio-nav-item {
+  .portfolio-nav-item:not(:last-child) {
+    margin-bottom: 1rem;
+  }
+
+  .portfolio-nav-item button {
     display: flex;
     align-items: flex-start;
     gap: 0.5rem;
@@ -238,7 +254,7 @@
     transition: transform 0.6s var(--ease-standard), opacity 0.6s var(--ease-standard);
   }
 
-  .portfolio-nav-item.active {
+  .portfolio-nav-item.active button {
     transform: scale(1.5) translateX(-20%);
     opacity: 1;
   }