diff --git a/app/src/app/Layouts/Admin/AdminInventoryLayout.php b/app/src/app/Layouts/Admin/AdminInventoryLayout.php
index 502595a..d4517d4 100644
--- a/app/src/app/Layouts/Admin/AdminInventoryLayout.php
+++ b/app/src/app/Layouts/Admin/AdminInventoryLayout.php
@@ -13,6 +13,7 @@
     <link rel="stylesheet" href="/assets/css/app.css">
     <script src="/assets/js/tailwind.js"></script>
     <script src="https://kit.fontawesome.com/f80b94bd90.js" crossorigin="anonymous"></script>
+    <script src="https://cdn.lordicon.com/lordicon.js"></script>
     <link href="https://api.mapbox.com/mapbox-gl-js/v3.8.0/mapbox-gl.css" rel="stylesheet">
     <script src="https://api.mapbox.com/mapbox-gl-js/v3.8.0/mapbox-gl.js"></script>
     <style>
@@ -31,80 +32,109 @@
 
 <body>
     <!-- Navigation Bar -->
-    <div class="border-b border-gray">
-        <nav class="flex items-center justify-between px-4 py-4 h-16 max-w-7xl mx-auto">
+    <div class="border-b border-softGray">
+        <nav class="flex items-center px-2 py-4 h-16 max-w-7xl mx-auto justify-between">
 
             <!-- Logo -->
-            <a href="#">
+            <a href="#" class="md:basis-1/3 basis-1/5 flex justify-start">
                 <img class="md:block hidden w-48" src="/assets/images/logotip-horizontal.png" alt="Logo">
-                <img class="md:hidden block" src="/assets/images/isotip.png" alt="Logo">
+                <img class="md:hidden block w-12" src="/assets/images/resized-isotip.png" alt="Logo">
             </a>
-            <!-- Navigation Links (Visible only on large screens) -->
-            <div class="hidden md:flex gap-6">
+
+            <div class="flex md:flex gap-3 md:gap-6 basis-0 flex-grow justify-center">
                 <a href="/admin"
-                    class="menu-link <?= (strpos($currentPath, '/admin') === 0 && strpos($currentPath, '/admin/inventory') === false) ? 'active' : ''; ?>">
+                    class="menu-link text-sm sm:text-lg align-middle <?= (strpos($currentPath, '/admin') === 0 && strpos($currentPath, '/admin/inventory') === false) ? 'active' : ''; ?>">
                     Gestión
                 </a>
                 <a href="/admin/inventory"
-                    class="menu-link <?= ($currentPath === '/admin/inventory') ? 'active' : ''; ?>">
+                    class="menu-link text-sm sm:text-lg align-middle <?= ($currentPath === '/admin/inventory') ? 'active' : ''; ?>">
                     Inventario
                 </a>
             </div>
 
-
             <!-- User Section -->
-            <div class="flex items-center gap-4 mx-2">
+            <div class="flex items-center gap-4 mx-2 basis-1/3 justify-end">
                 <!-- User Info Dropdown -->
                 <div class="relative inline-block text-left">
                     <button onclick="toggleSubmenu()"
                         class="flex items-center gap-2 bg-white px-3 py-2 text-sm text-gray-900 rounded-md shadow-sm ring-1 ring-inset ring-gray-300 hover:bg-gray-50">
-                        Contratos
-                        <svg class="-mr-1 size-5 text-gray-400" viewBox="0 0 20 20" fill="currentColor"
+                        <span class="hidden sm:block">Contratos</span>
+                        <svg class="hidden sm:block -mr-1 size-5 text-gray-400" viewBox="0 0 20 20" fill="currentColor"
                             aria-hidden="true">
                             <path fill-rule="evenodd"
                                 d="M5.22 8.22a.75.75 0 0 1 1.06 0L10 11.94l3.72-3.72a.75.75 0 1 1 1.06 1.06l-4.25 4.25a.75.75 0 0 1-1.06 0L5.22 9.28a.75.75 0 0 1 0-1.06Z"
                                 clip-rule="evenodd" />
                         </svg>
+                        <lord-icon class="block sm:hidden" src="https://cdn.lordicon.com/vdjwmfqs.json" trigger="hover"
+                            colors="primary:#747474" style="width:22px;height:22px">
+                        </lord-icon>
                     </button>
                 </div>
+
                 <!-- Notifications Icon -->
                 <a href="#" class="hidden md:block text-gray-700 hover:text-blue-600">
-                    <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5"
-                        stroke="currentColor" class="h-6 w-6">
-                        <path stroke-linecap="round" stroke-linejoin="round"
-                            d="M14.857 17.082a23.848 23.848 0 0 0 5.454-1.31A8.967 8.967 0 0 1 18 9.75V9A6 6 0 0 0 6 9v.75a8.967 8.967 0 0 1-2.312 6.022c1.733.64 3.56 1.085 5.455 1.31m5.714 0a24.255 24.255 0 0 1-5.714 0m5.714 0a3 3 0 1 1-5.714 0" />
-                    </svg>
+                    <lord-icon src="https://cdn.lordicon.com/vspbqszr.json" trigger="hover" state="loop-bell"
+                        colors="primary:#747474" style="width:28px;height:28px">
+                    </lord-icon>
                 </a>
+
                 <!-- User Avatar -->
                 <div class="relative flex items-center gap-2 cursor-pointer"
                     onclick="profileDropdown.classList.toggle('hidden')">
-                    <img class="h-10 rounded-full" src="/assets/images/avatar.png" alt="User Avatar">
+                    <img class="h-10 rounded-full" style="width: 25px; height: 25px" src="/assets/images/avatar.png"
+                        alt="User Avatar">
                     <div class="hidden md:block text-sm relative">
                         <span
                             class="block text-gray-700"><?= $_SESSION['user']['name'] . ' ' . $_SESSION['user']['surname']; ?></span>
                         <span class="block text-gray-500">
                             <?= User::role_name($_SESSION['user']['role']); ?>
                         </span>
-                        <div id="profile-dropdown"
-                            class="hidden absolute right-0 z-10 mt-2 w-56 origin-top-right rounded-md bg-white shadow-lg ring-1 ring-black/5 focus:outline-none"
-                            role="menu" aria-orientation="vertical" aria-labelledby="menu-button" tabindex="-1">
-                            <div class="py-1" role="none">
-                                <a href="#" class="block px-4 py-2 text-sm text-gray-700 hover:text-gray-800"
-                                    role="menuitem" tabindex="-1" id="menu-item-0">Configuración de la cuenta</a>
-                                <a href="#" class="block px-4 py-2 text-sm text-gray-700" role="menuitem" tabindex="-1"
-                                    id="menu-item-1">Soporte</a>
-                                <a href="#" class="block px-4 py-2 text-sm text-gray-700" role="menuitem" tabindex="-1"
-                                    id="menu-item-2">Licencia</a>
-                                <a href="/logout" class="block px-4 py-2 text-sm text-gray-700 hover:text-gray-800"
-                                    role="menuitem" tabindex="-1" id="menu-item-3">Cerrar sesión</a>
-                            </div>
-                        </div>
                     </div>
                 </div>
             </div>
         </nav>
     </div>
 
+
+    <div id="submenu"
+        class="md:flex overflow-x-auto justify-center items-center gap-6 p-6 shadow-md sm:shadow-none px-2 py-1 sm:py-4">
+        <div class="submenu text-center flex items-center justify-center space-x-6 w-full">
+            <div class="submenu-item">
+                <a href="/admin/contracts"
+                    class="link-primary <?= ($currentPath == '/admin/contracts') ? 'active' : ''; ?>">
+                    <i class="fas fa-file-contract block"></i>
+                    <span class="text-sm font-medium whitespace-nowrap">Contratos</span>
+                </a>
+            </div>
+
+            <div class="submenu-item">
+                <a href="/admin/zones" class="link-primary <?= ($currentPath == '/admin/zones') ? 'active' : ''; ?>">
+                    <i class="fas fa-map-marker-alt md:block"></i>
+                    <span class="text-sm font-medium whitespace-nowrap">Zonas</span>
+                </a>
+            </div>
+
+            <div class="submenu-item">
+                <a href="/admin/elements"
+                    class="link-primary <?= ($currentPath == '/admin/elements') ? 'active' : ''; ?>">
+                    <i class="fas fa-cube md:block"></i>
+                    <span class="text-sm font-medium whitespace-nowrap">Elementos</span>
+                </a>
+            </div>
+        </div>
+    </div>
+
+    </div>
+
+
+
+
+
+
+
+
+
+
     <!-- Main Content -->
     <?= $content ?>
 
diff --git a/app/src/app/Layouts/Admin/AdminLayout.php b/app/src/app/Layouts/Admin/AdminLayout.php
index 17d006b..448c663 100644
--- a/app/src/app/Layouts/Admin/AdminLayout.php
+++ b/app/src/app/Layouts/Admin/AdminLayout.php
@@ -14,74 +14,69 @@
     <link rel="stylesheet" href="/assets/css/app.css">
     <script src="/assets/js/tailwind.js"></script>
     <script src="https://kit.fontawesome.com/f80b94bd90.js" crossorigin="anonymous"></script>
+    <script src="https://cdn.lordicon.com/lordicon.js"></script>
+
 </head>
 
 <body>
     <!-- Navigation Bar -->
-    <div class="border-b border-gray">
-        <nav class="flex items-center justify-between px-4 py-4 h-16 max-w-7xl mx-auto">
+    <div class="border-b border-softGray">
+        <nav class="flex items-center px-2 py-4 h-16 max-w-7xl mx-auto justify-between">
 
             <!-- Logo -->
-            <a href="#">
+            <a href="#" class="md:basis-1/3 basis-1/5 flex justify-start">
                 <img class="md:block hidden w-48" src="/assets/images/logotip-horizontal.png" alt="Logo">
-                <img class="md:hidden block" src="/assets/images/isotip.png" alt="Logo">
+                <img class="md:hidden block w-12" src="/assets/images/resized-isotip.png" alt="Logo">
             </a>
-            <!-- Navigation Links (Visible only on large screens) -->
-            <div class="hidden md:flex gap-6">
+
+            <div class="flex md:flex gap-3 md:gap-6 basis-0 flex-grow justify-center">
                 <a href="/admin"
-                    class="menu-link <?= (strpos($currentPath, '/admin') === 0 && strpos($currentPath, '/admin/inventory') === false) ? 'active' : ''; ?>">
+                    class="menu-link text-sm sm:text-lg align-middle <?= (strpos($currentPath, '/admin') === 0 && strpos($currentPath, '/admin/inventory') === false) ? 'active' : ''; ?>">
                     Gestión
                 </a>
                 <a href="/admin/inventory"
-                    class="menu-link <?= ($currentPath === '/admin/inventory') ? 'active' : ''; ?>">
+                    class="menu-link text-sm sm:text-lg align-middle <?= ($currentPath === '/admin/inventory') ? 'active' : ''; ?>">
                     Inventario
                 </a>
             </div>
 
-
-            <div class="flex items-center gap-4 mx-2">
+            <!-- User Section -->
+            <div class="flex items-center gap-4 mx-2 basis-1/3 justify-end">
+                <!-- User Info Dropdown -->
                 <div class="relative inline-block text-left">
                     <button onclick="toggleSubmenu()"
                         class="flex items-center gap-2 bg-white px-3 py-2 text-sm text-gray-900 rounded-md shadow-sm ring-1 ring-inset ring-gray-300 hover:bg-gray-50">
-                        Contratos
-                        <svg class="-mr-1 size-5 text-gray-400" viewBox="0 0 20 20" fill="currentColor"
+                        <span class="hidden sm:block">Contratos</span>
+                        <svg class="hidden sm:block -mr-1 size-5 text-gray-400" viewBox="0 0 20 20" fill="currentColor"
                             aria-hidden="true">
                             <path fill-rule="evenodd"
                                 d="M5.22 8.22a.75.75 0 0 1 1.06 0L10 11.94l3.72-3.72a.75.75 0 1 1 1.06 1.06l-4.25 4.25a.75.75 0 0 1-1.06 0L5.22 9.28a.75.75 0 0 1 0-1.06Z"
                                 clip-rule="evenodd" />
                         </svg>
+                        <lord-icon class="block sm:hidden" src="https://cdn.lordicon.com/vdjwmfqs.json" trigger="hover"
+                            colors="primary:#747474" style="width:22px;height:22px">
+                        </lord-icon>
                     </button>
                 </div>
-                <button class="hidden md:block text-gray-700 hover:text-blue-600">
-                    <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5"
-                        stroke="currentColor" class="h-6 w-6">
-                        <path stroke-linecap="round" stroke-linejoin="round"
-                            d="M14.857 17.082a23.848 23.848 0 0 0 5.454-1.31A8.967 8.967 0 0 1 18 9.75V9A6 6 0 0 0 6 9v.75a8.967 8.967 0 0 1-2.312 6.022c1.733.64 3.56 1.085 5.455 1.31m5.714 0a24.255 24.255 0 0 1-5.714 0m5.714 0a3 3 0 1 1-5.714 0" />
-                    </svg>
-                </button>
+
+                <!-- Notifications Icon -->
+                <a href="#" class="hidden md:block text-gray-700 hover:text-blue-600">
+                    <lord-icon src="https://cdn.lordicon.com/vspbqszr.json" trigger="hover" state="loop-bell"
+                        colors="primary:#747474" style="width:28px;height:28px">
+                    </lord-icon>
+                </a>
+
+                <!-- User Avatar -->
                 <div class="relative flex items-center gap-2 cursor-pointer"
                     onclick="profileDropdown.classList.toggle('hidden')">
-                    <img class="h-10 rounded-full" src="/assets/images/avatar.png" alt="User Avatar">
+                    <img class="h-10 rounded-full" style="width: 25px; height: 25px" src="/assets/images/avatar.png"
+                        alt="User Avatar">
                     <div class="hidden md:block text-sm relative">
                         <span
                             class="block text-gray-700"><?= $_SESSION['user']['name'] . ' ' . $_SESSION['user']['surname']; ?></span>
                         <span class="block text-gray-500">
                             <?= User::role_name($_SESSION['user']['role']); ?>
                         </span>
-                        <div id="profile-dropdown"
-                            class="hidden absolute right-0 z-10 mt-2 w-56 origin-top-right rounded-md bg-white shadow-lg ring-1 ring-black/5 focus:outline-none"
-                            role="menu" aria-orientation="vertical" aria-labelledby="menu-button" tabindex="-1">
-                            <div class="py-1" role="none">
-                                <a href="#" class="block px-4 py-2 text-sm text-gray-700 hover:text-gray-800"
-                                    role="menuitem" tabindex="-1" id="menu-item-0">Configuración de la cuenta</a>
-                                <a href="#" class="block px-4 py-2 text-sm text-gray-700" role="menuitem" tabindex="-1"
-                                    id="menu-item-1">Soporte</a>
-                                <a href="#" class="block px-4 py-2 text-sm text-gray-700" role="menuitem" tabindex="-1"
-                                    id="menu-item-2">Licencia</a>
-                                <a href="/logout" class="block px-4 py-2 text-sm text-gray-700 hover:text-gray-800"
-                                    role="menuitem" tabindex="-1" id="menu-item-3">Cerrar sesión</a>
-                            </div>
-                        </div>
                     </div>
                 </div>
             </div>
diff --git a/app/src/app/Views/Admin/Contracts.php b/app/src/app/Views/Admin/Contracts.php
index 4a03e17..96c135a 100644
--- a/app/src/app/Views/Admin/Contracts.php
+++ b/app/src/app/Views/Admin/Contracts.php
@@ -19,8 +19,10 @@
             </tr>
         </thead>
         <tbody>
-            <?php foreach ($contracts as $contract) { ?>
-                <tr class="border-b hover:bg-gray-50">
+            <?php foreach ($contracts as $index => $contract) {
+                $isLast = $index === count($contracts) - 1;
+                ?>
+                <tr class="border-b <?= $isLast ? '' : 'hover:bg-gray-50'; ?>">
                     <th scope="row" class="px-5 py-4 font-medium text-gray-900 whitespace-nowrap dark\:text-white">
                         <?= $contract->name; ?>
                     </th>
@@ -51,7 +53,6 @@ class="text-lime-600 hover:scale-110" title="Editar">
                         <a href="/admin/contract/<?= htmlspecialchars($contract->getId()); ?>/delete"
                             onclick="return confirm('¿Desea eliminar el contrato <?= htmlspecialchars($contract->name); ?>?');"
                             class="text-red-600 hover:scale-110" title="Eliminar">
-                            <!-- <i class="fa-regular fa-trash-can"></i> -->
                             <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5"
                                 stroke="currentColor" class="w-5 h-5">
                                 <path stroke-linecap="round" stroke-linejoin="round"
@@ -63,4 +64,4 @@ class="text-red-600 hover:scale-110" title="Eliminar">
             <?php } ?>
         </tbody>
     </table>
-</div>
+</div>
\ No newline at end of file
diff --git a/app/src/public/assets/images/resized-isotip.png b/app/src/public/assets/images/resized-isotip.png
new file mode 100644
index 0000000..cd095e6
Binary files /dev/null and b/app/src/public/assets/images/resized-isotip.png differ
diff --git a/app/src/public/assets/js/tailwind.js b/app/src/public/assets/js/tailwind.js
index 1c7bed0..8b8dbf0 100644
--- a/app/src/public/assets/js/tailwind.js
+++ b/app/src/public/assets/js/tailwind.js
@@ -4,7 +4,13 @@ tailwind.config = {
             colors: {
                 darkGreen: "#008037",
                 lightGreen: "#7FD959",
+                gray: "#717171",
+                softGray: "#d1d1d1",
+                darkGray: "#444444",
                 black: "#222222",
+                hoverBlack: "#000000",
+                activeBorder: "#222222",
+                red: "#FF0000",
             },
             fontFamily: {
                 sans: ["Poppins", "sans-serif"],
@@ -17,47 +23,47 @@ tailwind.config = {
         function ({ addComponents }) {
             addComponents({
                 ".menu-link": {
-                    "@apply font-bold text-lg text-gray-500 hover:text-neutral-700 transition-colors relative":
+                    "@apply font-bold text-lg text-gray hover:text-darkGray transition-colors relative":
                         {},
                     "&::after": {
-                        "@apply absolute bottom-[-2px] left-0 w-0 h-[2px] bg-neutral-700":
+                        "@apply absolute bottom-[-2px] left-0 w-0 h-[2px] bg-darkGray":
                             {},
                     },
                     "&:hover::after": {
                         "@apply w-full": {},
                     },
                     "&.active": {
-                        "@apply text-neutral-700": {},
+                        "@apply text-darkGray": {},
                     },
                     "&.active::after": {
-                        "@apply w-full bg-neutral-700": {},
+                        "@apply w-full bg-darkGray": {},
                     },
                 },
 
                 ".link-primary": {
-                    "@apply text-sm tracking-tighter lg:tracking-widest font-medium text-gray-500 font-sans hover:text-neutral-700 transition-colors relative":
+                    "@apply text-sm tracking-wide font-medium text-gray font-sans hover:text-darkGray transition-colors relative":
                         {},
                     "&.active": {
-                        "@apply text-neutral-700 font-bold": {},
+                        "@apply text-darkGray font-bold": {},
                     },
                     "&::after": {
-                        "@apply content-[''] absolute bottom-[-2px] left-0 w-0 h-[2px] bg-neutral-700 transition-all duration-300 ease-in-out":
+                        "@apply content-[''] absolute bottom-[-2px] left-0 w-0 h-[2px] bg-darkGray transition-all duration-300 ease-in-out":
                             {},
                     },
                     "&:hover::after": {
                         "@apply w-full": {},
                     },
                     "&.active::after": {
-                        "@apply w-full bg-neutral-700": {},
+                        "@apply w-full bg-darkGray": {},
                     },
                 },
 
                 ".link-secondary": {
-                    "@apply text-gray-500 font-sans hover:text-neutral-700 transition-colors":
+                    "@apply text-gray font-sans hover:text-darkGray transition-colors":
                         {},
                 },
                 ".submenu-item": {
-                    "@apply py-2 flex flex-col items-center text-center gap-1":
+                    "@apply py-2 flex flex-col md:items-center md:text-center":
                         {},
                 },
                 ".btn-create": {
@@ -68,13 +74,14 @@ tailwind.config = {
                     "@apply font-condensed": {},
                 },
                 ".box-shadow": {
-                    "@apply rounded-lg shadow-lg p-4": {},
+                    "@apply rounded-lg shadow-lg bg-hoverGray p-4": {},
                 },
                 ".box-flat": {
-                    "@apply border border-gray-500 p-4": {},
+                    "@apply border border-gray p-4": {},
                 },
                 ".box-active": {
-                    "@apply border border-darkGreen text-darkGreen p-4": {},
+                    "@apply border border-darkGreen bg-grayActive text-darkGreen p-4":
+                        {},
                 },
             });
         },
