diff --git a/css/pages/_article.css b/css/pages/_article.css
index dcfc4209..84380c01 100644
--- a/css/pages/_article.css
+++ b/css/pages/_article.css
@@ -746,3 +746,31 @@
 .article-page--prose .article-layout-container { display: block; }
 .article-page--prose .article-container { max-width: 760px; margin: 0 auto; }
 .article-page--prose .mobile-article-header { display: none; }
+
+/* ---- Sidebar CTA: sits under the table of contents (Proxify-style) ---- */
+.sidebar-cta {
+    flex-shrink: 0;
+    margin-top: 18px;
+    background: linear-gradient(160deg, #21596E 0%, #143240 100%);
+    border-radius: 16px;
+    padding: 20px 18px;
+    text-align: center;
+    color: #FFFFFF;
+}
+.sidebar-cta-title { font-size: 16px; font-weight: 700; line-height: 1.3; margin: 0 0 14px; }
+.sidebar-cta-btn {
+    display: block; background: #FA7850; color: #FFFFFF; font-weight: 600; font-size: 14px;
+    padding: 11px 14px; border-radius: 10px; text-decoration: none;
+    transition: background 0.18s ease;
+}
+.sidebar-cta-btn:hover { background: #E8613B; }
+.sidebar-cta-note { font-size: 12px; line-height: 17px; color: rgba(255,255,255,0.78); margin: 12px 0 0; }
+.sidebar-cta-note a { color: #FFFFFF; text-decoration: underline; text-underline-offset: 2px; }
+
+/* Where a page has the sidebar CTA (i.e. it has a ToC), the desktop bottom CTA is
+   redundant, so hide it above the mobile breakpoint. Pages without a ToC sidebar
+   keep the bottom CTA on every screen. On mobile the sidebar is hidden, so the
+   bottom CTA always shows. */
+@media (min-width: 769px) {
+    .article-page:has(.sidebar-cta) .article-support-cta { display: none; }
+}
diff --git a/en/projects/macedonian-student-night-in-ljubljana/index.html b/en/projects/macedonian-student-night-in-ljubljana/index.html
index 864bd6e3..fde5ab44 100644
--- a/en/projects/macedonian-student-night-in-ljubljana/index.html
+++ b/en/projects/macedonian-student-night-in-ljubljana/index.html
@@ -219,6 +219,11 @@
                         <li><a href="#a-beginning">A Beginning to Remember</a></li>
                     </ul>
                 </nav>
+                            <div class="sidebar-cta">
+                    <p class="sidebar-cta-title">Like what we do?</p>
+                    <a class="sidebar-cta-btn" href="../../../en/become-a-member/">Become a member</a>
+                    <p class="sidebar-cta-note">Or <a href="../../../en/support/">support MSOS</a> so we can create even more moments like this.</p>
+                </div>
             </aside>
 
             <article class="article-container">
diff --git a/en/projects/meet-student-slovenia-2023/index.html b/en/projects/meet-student-slovenia-2023/index.html
index 3affd10f..9e902914 100644
--- a/en/projects/meet-student-slovenia-2023/index.html
+++ b/en/projects/meet-student-slovenia-2023/index.html
@@ -222,6 +222,11 @@
                         <li><a href="#see-you">See you in Slovenia!</a></li>
                     </ul>
                 </nav>
+                            <div class="sidebar-cta">
+                    <p class="sidebar-cta-title">Like what we do?</p>
+                    <a class="sidebar-cta-btn" href="../../../en/become-a-member/">Become a member</a>
+                    <p class="sidebar-cta-note">Or <a href="../../../en/support/">support MSOS</a> so we can create even more moments like this.</p>
+                </div>
             </aside>
 
             <article class="article-container">
diff --git a/en/projects/meet-student-slovenia-2024/index.html b/en/projects/meet-student-slovenia-2024/index.html
index a9270ef4..55ec04c7 100644
--- a/en/projects/meet-student-slovenia-2024/index.html
+++ b/en/projects/meet-student-slovenia-2024/index.html
@@ -221,6 +221,11 @@
                         <li><a href="#see-you">See you in Slovenia!</a></li>
                     </ul>
                 </nav>
+                            <div class="sidebar-cta">
+                    <p class="sidebar-cta-title">Like what we do?</p>
+                    <a class="sidebar-cta-btn" href="../../../en/become-a-member/">Become a member</a>
+                    <p class="sidebar-cta-note">Or <a href="../../../en/support/">support MSOS</a> so we can create even more moments like this.</p>
+                </div>
             </aside>
             
             <article class="article-container">
diff --git a/en/projects/morning-coffee-in-front-of-ctk/index.html b/en/projects/morning-coffee-in-front-of-ctk/index.html
index c7a2a916..77f27736 100644
--- a/en/projects/morning-coffee-in-front-of-ctk/index.html
+++ b/en/projects/morning-coffee-in-front-of-ctk/index.html
@@ -219,6 +219,11 @@
                         <li><a href="#coffee-and-burek">Coffee and Burek as motivation</a></li>
                     </ul>
                 </nav>
+                            <div class="sidebar-cta">
+                    <p class="sidebar-cta-title">Like what we do?</p>
+                    <a class="sidebar-cta-btn" href="../../../en/become-a-member/">Become a member</a>
+                    <p class="sidebar-cta-note">Or <a href="../../../en/support/">support MSOS</a> so we can create even more moments like this.</p>
+                </div>
             </aside>
 
             <article class="article-container">