diff --git a/wp-content/themes/apus-theme/footer.php b/wp-content/themes/apus-theme/footer.php
index 7c43d5d1..56cc26b5 100644
--- a/wp-content/themes/apus-theme/footer.php
+++ b/wp-content/themes/apus-theme/footer.php
@@ -82,7 +82,7 @@
 
 	</div><!-- #content .site-content -->
 
-	<footer id="colophon" class="site-footer" role="contentinfo">
+	<footer class="py-5 mt-0 bg-dark text-white" role="contentinfo">
 
 		<?php if ( is_active_sidebar( 'footer-1' ) || is_active_sidebar( 'footer-2' ) || is_active_sidebar( 'footer-3' ) || is_active_sidebar( 'footer-4' ) ) : ?>
 			<div class="footer-widgets">
diff --git a/wp-content/themes/apus-theme/header.php b/wp-content/themes/apus-theme/header.php
index d582f951..abf01a4a 100644
--- a/wp-content/themes/apus-theme/header.php
+++ b/wp-content/themes/apus-theme/header.php
@@ -29,11 +29,11 @@
 
 <div id="page" class="site">
 
-	<!-- Top Notification Bar (Issue #39) -->
+	<!-- Top Notification Bar (Template líneas 253-262) -->
 	<?php if ( ! isset( $_COOKIE['apus_notification_dismissed'] ) ) : ?>
 	<div id="topNotificationBar" class="top-notification-bar">
-		<div class="container-fluid">
-			<div class="d-flex align-items-center justify-content-center position-relative">
+		<div class="container">
+			<div class="d-flex align-items-center justify-content-center">
 				<i class="bi bi-megaphone-fill me-2"></i>
 				<span class="notification-text">
 					<span class="text-highlight"><?php esc_html_e( 'Nuevo:', 'apus-theme' ); ?></span>
@@ -43,9 +43,6 @@
 				<a href="<?php echo esc_url( home_url( '/catalogo' ) ); ?>" class="ms-2 notification-link">
 					<?php esc_html_e( 'Ver Catálogo', 'apus-theme' ); ?>
 				</a>
-				<button type="button" class="btn-close-notification ms-auto" aria-label="<?php esc_attr_e( 'Cerrar notificación', 'apus-theme' ); ?>">
-					<i class="bi bi-x-lg"></i>
-				</button>
 			</div>
 		</div>
 	</div>
@@ -55,20 +52,7 @@
 	<nav class="navbar navbar-expand-lg navbar-dark py-3" role="navigation" aria-label="<?php esc_attr_e( 'Primary Navigation', 'apus-theme' ); ?>">
 		<div class="container">
 
-			<!-- Logo / Site Title -->
-			<a class="navbar-brand" href="<?php echo esc_url( home_url( '/' ) ); ?>">
-				<?php
-				if ( has_custom_logo() ) {
-					the_custom_logo();
-				} else {
-					?>
-					<b><?php bloginfo( 'name' ); ?></b>
-					<?php
-				}
-				?>
-			</a>
-
-			<!-- Hamburger Toggle Button (Bootstrap 5) -->
+			<!-- Hamburger Toggle Button (Bootstrap 5) - PRIMERO según template línea 286 -->
 			<button class="navbar-toggler"
 			        type="button"
 			        data-bs-toggle="collapse"
@@ -87,7 +71,7 @@
 						array(
 							'theme_location'  => 'primary',
 							'container'       => false,
-							'menu_class'      => 'navbar-nav ms-auto mb-2 mb-lg-0',
+							'menu_class'      => 'navbar-nav mb-2 mb-lg-0',
 							'fallback_cb'     => false,
 							'depth'           => 2,
 							'walker'          => new WP_Bootstrap_Navwalker(),
@@ -96,7 +80,7 @@
 				} else {
 					// Fallback si no hay menú asignado
 					?>
-					<ul class="navbar-nav ms-auto mb-2 mb-lg-0">
+					<ul class="navbar-nav mb-2 mb-lg-0">
 						<li class="nav-item">
 							<a class="nav-link" href="<?php echo esc_url( home_url( '/' ) ); ?>">
 								<?php esc_html_e( 'Home', 'apus-theme' ); ?>
diff --git a/wp-content/themes/apus-theme/sidebar.php b/wp-content/themes/apus-theme/sidebar.php
index 422d8461..f95966af 100644
--- a/wp-content/themes/apus-theme/sidebar.php
+++ b/wp-content/themes/apus-theme/sidebar.php
@@ -15,27 +15,23 @@ if ( ! is_active_sidebar( 'sidebar-1' ) ) {
 }
 ?>
 
-<aside id="secondary" class="widget-area sidebar" role="complementary" aria-label="<?php esc_attr_e( 'Primary Sidebar', 'apus-theme' ); ?>">
+<div class="sidebar-sticky position-sticky" style="top: 5rem;">
+	<?php
+	/**
+	 * Display sidebar widgets (TOC)
+	 *
+	 * Widgets can be added through Appearance > Widgets in the WordPress admin.
+	 * The sidebar must be registered in functions.php for widgets to appear here.
+	 */
+	dynamic_sidebar( 'sidebar-1' );
+	?>
 
-	<div class="sidebar-inner">
-		<?php
-		/**
-		 * Display sidebar widgets
-		 *
-		 * Widgets can be added through Appearance > Widgets in the WordPress admin.
-		 * The sidebar must be registered in functions.php for widgets to appear here.
-		 */
-		dynamic_sidebar( 'sidebar-1' );
-		?>
-
-		<?php
-		/**
-		 * CTA Box Sidebar (Issue #36)
-		 *
-		 * Display CTA box below TOC on single posts
-		 */
-		get_template_part( 'template-parts/cta-box', 'sidebar' );
-		?>
-	</div><!-- .sidebar-inner -->
-
-</aside><!-- #secondary -->
+	<?php
+	/**
+	 * CTA Box Sidebar (Issue #36)
+	 *
+	 * Display CTA box below TOC on single posts
+	 */
+	get_template_part( 'template-parts/cta-box', 'sidebar' );
+	?>
+</div><!-- .sidebar-sticky -->
diff --git a/wp-content/themes/apus-theme/single.php b/wp-content/themes/apus-theme/single.php
index 550015b4..52222c49 100644
--- a/wp-content/themes/apus-theme/single.php
+++ b/wp-content/themes/apus-theme/single.php
@@ -242,7 +242,7 @@ get_template_part('template-parts/content', 'hero');
 				if ( is_active_sidebar( 'sidebar-1' ) ) :
 					?>
 					<div class="col-lg-3">
-						<?php get_template_part( 'template-parts/sidebar' ); ?>
+						<?php get_sidebar(); ?>
 					</div><!-- .col-lg-3 -->
 					<?php
 				endif;