diff --git a/css/styles.css b/css/styles.css
index a9e2491..06c6e6a 100644
--- a/css/styles.css
+++ b/css/styles.css
@@ -90,12 +90,26 @@ img {
     font-size: 18px;
     font-weight: 500;
     transition: background-color 0.2s;
+    position: relative;
+    overflow: hidden;
 }
 
 .nav-item:hover {
     background-color: rgba(0, 0, 0, 0.05);
 }
 
+/* Styles pour la page active dans la sidebar */
+.nav-item.active {
+    background-color: rgba(255, 0, 0, 0.08);
+    font-weight: 600;
+    color: var(--primary-red);
+    box-shadow: inset 3px 0 0 var(--primary-red);
+}
+
+.nav-item.active i {
+    color: var(--primary-red);
+}
+
 .nav-item i, .nav-item img {
     margin-right: 15px;
     width: 24px;
@@ -132,6 +146,14 @@ img {
     transform: translateX(5px);
 }
 
+/* Style pour un tag actif */
+.tag-item.active {
+    background-color: rgba(255, 0, 0, 0.08);
+    color: var(--primary-red);
+    font-weight: 600;
+    box-shadow: inset 3px 0 0 var(--primary-red);
+}
+
 .tag-icon {
     color: var(--primary-red);
     font-size: 0.9em;
@@ -139,10 +161,48 @@ img {
     transition: transform 0.2s ease;
 }
 
-.tag-item:hover .tag-icon {
+.tag-item:hover .tag-icon, 
+.tag-item.active .tag-icon {
     transform: scale(1.5);
 }
 
+/* Media queries pour le style actif sur les différentes tailles d'écran */
+@media (max-width: 1200px) and (min-width: 1001px) {
+    .nav-item.active {
+        background-color: rgba(255, 0, 0, 0.15);
+    }
+    
+    .nav-item.active::after {
+        content: attr(data-title);
+        position: absolute;
+        left: 70px;
+        top: 50%;
+        transform: translateY(-50%);
+        background: var(--primary-red);
+        color: white;
+        padding: 5px 10px;
+        border-radius: 4px;
+        white-space: nowrap;
+        box-shadow: 0 1px 5px rgba(0,0,0,0.2);
+        z-index: 100;
+    }
+}
+
+/* Style pour le menu mobile */
+.mobile-menu .nav-item.active {
+    background-color: rgba(255, 0, 0, 0.08);
+    color: var(--primary-red);
+    font-weight: 600;
+    box-shadow: inset 3px 0 0 var(--primary-red);
+}
+
+.mobile-menu .tag-item.active {
+    background-color: rgba(255, 0, 0, 0.08);
+    color: var(--primary-red);
+    font-weight: 600;
+    box-shadow: inset 3px 0 0 var(--primary-red);
+}
+
 /* Header */
 .header {
     display: flex;
diff --git a/includes/mobile-menu.php b/includes/mobile-menu.php
index c5d1d4c..543d32e 100644
--- a/includes/mobile-menu.php
+++ b/includes/mobile-menu.php
@@ -11,73 +11,81 @@
         </form>
     </div>
     
-    <a href="index.php" class="nav-item">
-        <i class="fas fa-home"></i> Accueil
-    </a>
-    <a href="direct.php" class="nav-item">
-        <i class="fas fa-broadcast-tower"></i> Direct
-    </a>
-    
-    <div class="nav-divider"></div>
-    
-    <?php
-    // Afficher les catégories prioritaires
-    if (defined('PRIORITY_CATEGORIES') && !empty(PRIORITY_CATEGORIES)) {
-        // Tableau associatif des icônes pour les catégories
-        $categoryIcons = [
-            1 => 'fas fa-music',           // Musique
-            5 => 'fas fa-running',          // Sport
-            11 => 'fas fa-globe',           // Actualité & Politique
-            2 => 'fas fa-film',             // Films
-            3 => 'fas fa-video',            // Émissions & Séries
-            4 => 'fas fa-gamepad',          // Jeux
-            6 => 'fas fa-laugh',            // Humour
-            7 => 'fas fa-palette',          // Art
-            8 => 'fas fa-spa',              // Bien-être
-            9 => 'fas fa-tshirt',           // Mode
-            10 => 'fas fa-random',          // Divers
-            12 => 'fas fa-dollar-sign',     // Finance
-            13 => 'fas fa-graduation-cap',  // Education
-            14 => 'fas fa-fist-raised',     // Activism
-            15 => 'fas fa-microscope',      // Science & Technology
-            16 => 'fas fa-paw',             // Animals
-            17 => 'fas fa-child',           // Kids
-            18 => 'fas fa-utensils'         // Food
-        ];
+    <div>
+        <a href="index.php" class="nav-item <?php echo ($currentPage === 'index.php') ? 'active' : ''; ?>">
+            <i class="fas fa-home"></i> Accueil
+        </a>
+        <a href="direct.php" class="nav-item <?php echo ($currentPage === 'direct.php') ? 'active' : ''; ?>">
+            <i class="fas fa-broadcast-tower"></i> Direct
+        </a>
         
-        foreach (PRIORITY_CATEGORIES as $id => $name) {
-            $icon = isset($categoryIcons[$id]) ? $categoryIcons[$id] : 'fas fa-folder';
-            echo '<a href="categories.php?id=' . $id . '" class="nav-item">';
-            echo '<i class="' . $icon . '"></i> ' . htmlspecialchars($name);
-            echo '</a>';
+        <hr class="nav-divider">
+        
+        <?php
+        // Afficher les catégories prioritaires
+        if (defined('PRIORITY_CATEGORIES') && !empty(PRIORITY_CATEGORIES)) {
+            // Tableau associatif des icônes pour les catégories
+            $categoryIcons = [
+                1 => 'fas fa-music',           // Musique
+                5 => 'fas fa-running',          // Sport
+                11 => 'fas fa-globe',           // Actualité & Politique
+                2 => 'fas fa-film',             // Films
+                3 => 'fas fa-video',            // Émissions & Séries
+                4 => 'fas fa-gamepad',          // Jeux
+                6 => 'fas fa-laugh',            // Humour
+                7 => 'fas fa-palette',          // Art
+                8 => 'fas fa-spa',              // Bien-être
+                9 => 'fas fa-tshirt',           // Mode
+                10 => 'fas fa-random',          // Divers
+                12 => 'fas fa-dollar-sign',     // Finance
+                13 => 'fas fa-graduation-cap',  // Education
+                14 => 'fas fa-fist-raised',     // Activism
+                15 => 'fas fa-microscope',      // Science & Technology
+                16 => 'fas fa-paw',             // Animals
+                17 => 'fas fa-child',           // Kids
+                18 => 'fas fa-utensils'         // Food
+            ];
+            
+            foreach (PRIORITY_CATEGORIES as $id => $name) {
+                $isActive = ($currentPage === 'categories.php' && $currentCategoryId === $id);
+                $icon = isset($categoryIcons[$id]) ? $categoryIcons[$id] : 'fas fa-folder';
+                echo '<a href="categories.php?id=' . $id . '" class="nav-item ' . ($isActive ? 'active' : '') . '">';
+                echo '<i class="' . $icon . '"></i> ' . htmlspecialchars($name);
+                echo '</a>';
+            }
         }
-    }
-    ?>
+        ?>
+        
+        <hr class="nav-divider">
+    </div>
     
-    <div class="nav-divider"></div>
+    <div>
+        <h3 class="mobile-section-title">Hashtags populaires</h3>
+        <?php 
+        if (defined('IMPORTANT_TAGS') && !empty(IMPORTANT_TAGS)):
+            foreach (IMPORTANT_TAGS as $tag):
+                $encodedTag = urlencode('#' . $tag);
+                $isActive = ($isTagSearch && strtolower($currentTag) === strtolower($tag));
+        ?>
+        <a href="recherche.php?q=<?php echo $encodedTag; ?>" class="nav-item <?php echo $isActive ? 'active' : ''; ?>">
+            <i class="fas fa-hashtag"></i> <?php echo htmlspecialchars($tag); ?>
+        </a>
+        <?php 
+            endforeach;
+        endif;
+        ?>
+    </div>
     
-    <h3 class="mobile-section-title">Hashtags populaires</h3>
-    <?php 
-    if (defined('IMPORTANT_TAGS') && !empty(IMPORTANT_TAGS)):
-        foreach (IMPORTANT_TAGS as $tag):
-            $encodedTag = urlencode('#' . $tag);
-    ?>
-    <a href="recherche.php?q=<?php echo $encodedTag; ?>" class="nav-item">
-        <i class="fas fa-hashtag"></i> <?php echo htmlspecialchars($tag); ?>
-    </a>
-    <?php 
-        endforeach;
-    endif;
-    ?>
+    <hr class="nav-divider">
     
-    <div class="nav-divider"></div>
-    
-    <h3 class="mobile-section-title">Suivez-nous</h3>
-    <div class="mobile-social-icons">
-        <a target="_blank" rel="noreferrer" href="<?php echo FACEBOOK_URL; ?>"><i class="fab fa-facebook icon-facebook"></i></a>
-        <a target="_blank" rel="noreferrer" href="<?php echo INSTAGRAM_URL; ?>"><i class="fab fa-instagram icon-instagram"></i></a>
-        <a target="_blank" rel="noreferrer" href="<?php echo TIKTOK_URL; ?>"><i class="fab fa-tiktok icon-tiktok"></i></a>
-        <a target="_blank" rel="noreferrer" href="<?php echo YOUTUBE_URL; ?>"><i class="fab fa-youtube icon-youtube"></i></a>
-        <a target="_blank" rel="noreferrer" href="<?php echo X_URL; ?>"><i class="fab fa-x-twitter icon-x"></i></a>
+    <div>
+        <h3 class="mobile-section-title">Suivez-nous</h3>
+        <div class="mobile-social-icons">
+            <a target="_blank" rel="noreferrer" href="<?php echo FACEBOOK_URL; ?>"><i class="fab fa-facebook icon-facebook"></i></a>
+            <a target="_blank" rel="noreferrer" href="<?php echo INSTAGRAM_URL; ?>"><i class="fab fa-instagram icon-instagram"></i></a>
+            <a target="_blank" rel="noreferrer" href="<?php echo TIKTOK_URL; ?>"><i class="fab fa-tiktok icon-tiktok"></i></a>
+            <a target="_blank" rel="noreferrer" href="<?php echo YOUTUBE_URL; ?>"><i class="fab fa-youtube icon-youtube"></i></a>
+            <a target="_blank" rel="noreferrer" href="<?php echo X_URL; ?>"><i class="fab fa-x-twitter icon-x"></i></a>
+        </div>
     </div>
 </div>
diff --git a/includes/sidebar.php b/includes/sidebar.php
index a85f989..de5608f 100644
--- a/includes/sidebar.php
+++ b/includes/sidebar.php
@@ -4,11 +4,20 @@
         <img src="img/logo.png" alt="kaubuntu.re">
     </a>
     
+    <?php
+    // Détecter la page courante et ses paramètres
+    $currentPage = basename($_SERVER['PHP_SELF']);
+    $currentCategoryId = isset($_GET['id']) ? intval($_GET['id']) : null;
+    $currentQuery = isset($_GET['q']) ? trim($_GET['q']) : '';
+    $isTagSearch = !empty($currentQuery) && substr($currentQuery, 0, 1) === '#';
+    $currentTag = $isTagSearch ? substr($currentQuery, 1) : '';
+    ?>
+    
     <nav class="sidebar-nav">
-        <a href="index.php" class="nav-item" data-title="Accueil">
+        <a href="index.php" class="nav-item <?php echo ($currentPage === 'index.php') ? 'active' : ''; ?>" data-title="Accueil">
             <i class="fas fa-home"></i> <span>Accueil</span>
         </a>
-        <a href="direct.php" class="nav-item" data-title="Direct">
+        <a href="direct.php" class="nav-item <?php echo ($currentPage === 'direct.php') ? 'active' : ''; ?>" data-title="Direct">
             <i class="fas fa-broadcast-tower"></i> <span>Direct</span>
         </a>
         
@@ -40,8 +49,9 @@
             ];
             
             foreach (PRIORITY_CATEGORIES as $id => $name) {
+                $isActive = ($currentPage === 'categories.php' && $currentCategoryId === $id);
                 $icon = isset($categoryIcons[$id]) ? $categoryIcons[$id] : 'fas fa-folder';
-                echo '<a href="categories.php?id=' . $id . '" class="nav-item" data-title="' . htmlspecialchars($name) . '">';
+                echo '<a href="categories.php?id=' . $id . '" class="nav-item ' . ($isActive ? 'active' : '') . '" data-title="' . htmlspecialchars($name) . '">';
                 echo '<i class="' . $icon . '"></i> <span>' . htmlspecialchars($name) . '</span>';
                 echo '</a>';
             }
@@ -58,8 +68,9 @@
         if (defined('IMPORTANT_TAGS') && !empty(IMPORTANT_TAGS)):
             foreach (IMPORTANT_TAGS as $tag):
                 $encodedTag = urlencode('#' . $tag);
+                $isActive = ($isTagSearch && strtolower($currentTag) === strtolower($tag));
         ?>
-        <a href="recherche.php?q=<?php echo $encodedTag; ?>" class="tag-item" data-title="<?php echo htmlspecialchars($tag); ?>">
+        <a href="recherche.php?q=<?php echo $encodedTag; ?>" class="tag-item <?php echo $isActive ? 'active' : ''; ?>" data-title="<?php echo htmlspecialchars($tag); ?>">
             <i class="fas fa-hashtag tag-icon"></i> <span><?php echo htmlspecialchars($tag); ?></span>
         </a>
         <?php