fix sidebard sticky behavior

css/style.css

@@ -834,8 +834,6 @@ img.nav-svg-icon {
 	border-radius: var(--radius-lg);
 	padding: var(--space-lg);
 	font-size: 0.9rem;
-	position: sticky;
-	top: 72px;
 }
 
 /* Compact profile card inside the sidebar (article view) */

index.php

@@ -112,8 +112,9 @@
 			?>
 			</div>
 
-			<!-- Right Sidebar -->
-			<div class="col-md-3 offset-md-1">
+			<!-- Right Sidebar (align-self-start: card fits its content, doesn't
+			     stretch to match the main column's height) -->
+			<div class="col-md-3 offset-md-1 align-self-start">
 			<?php include(THEME_DIR_PHP.'sidebar.php'); ?>
 			</div>