diff --git a/index.html b/index.html
index aa2a10d..1c3e4dd 100644
--- a/index.html
+++ b/index.html
@@ -188,6 +188,26 @@ <h1>Augmenta × Three.js</h1>
           </div>
         </div>
       </details>
+
+      <footer class="sidebar-footer">
+        <div class="sidebar-footer-app">
+          <div class="sidebar-footer-title">Augmenta × Three.js</div>
+          <div class="sidebar-footer-subtitle">Real-time tracking debug viewer</div>
+        </div>
+        <div class="sidebar-footer-meta">
+          <span>Version 1.0.0</span>
+          <a
+            class="sidebar-footer-link"
+            href="https://augmenta.tech"
+            target="_blank"
+            rel="noopener noreferrer"
+            aria-label="Visit the Augmenta website"
+          >
+            <img src="./augmenta-favicon.png?v=4" alt="" width="16" height="16">
+            <span>augmenta.tech</span>
+          </a>
+        </div>
+      </footer>
     </aside>
   </main>
 
diff --git a/src/styles.css b/src/styles.css
index 926708c..a147ab8 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -135,6 +135,8 @@ button, input, select { font: inherit; }
   width: var(--sidebar-width);
   min-width: 0;
   height: 100%;
+  display: flex;
+  flex-direction: column;
   overflow-y: auto;
   border-left: 1px solid #252a35;
   background: rgba(17, 20, 26, 0.84);
@@ -151,6 +153,67 @@ button, input, select { font: inherit; }
   pointer-events: none;
 }
 
+.sidebar-footer {
+  margin-top: auto;
+  padding: 15px 18px 16px;
+  border-top: 1px solid #252a35;
+  color: #8f99aa;
+  background: rgba(12, 15, 20, .3);
+}
+
+.sidebar-footer-app {
+  display: grid;
+  gap: 2px;
+}
+
+.sidebar-footer-title {
+  color: #dbe1eb;
+  font-size: 11.5px;
+  font-weight: 650;
+  letter-spacing: .01em;
+}
+
+.sidebar-footer-subtitle {
+  color: #737d8e;
+  font-size: 9.5px;
+  line-height: 1.35;
+}
+
+.sidebar-footer-meta {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  margin-top: 10px;
+  font-size: 9.5px;
+}
+
+.sidebar-footer-link {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  color: #9da7b9;
+  text-decoration: none;
+  transition: color 120ms ease;
+}
+
+.sidebar-footer-link:hover {
+  color: var(--accent-hover);
+}
+
+.sidebar-footer-link:focus-visible {
+  outline: 1px solid var(--accent);
+  outline-offset: 3px;
+  border-radius: 2px;
+}
+
+.sidebar-footer-link img {
+  display: block;
+  width: 16px;
+  height: 16px;
+  object-fit: contain;
+}
+
 /* Desktop resize strip: invisible until the panel edge is hovered/focused. */
 .sidebar-resizer {
   position: absolute;
@@ -371,6 +434,7 @@ button.subtle-button.active:hover {
 
 /* Sidebar section hierarchy: compact top-level sections with denser Advanced controls. */
 .panel-section {
+  flex: 0 0 auto;
   --section-title-size: 13px;
   --advanced-title-size: 10.5px;
   --disclosure-chevron-size: .54em;