diff --git a/src/content/config.ts b/src/content/config.ts
new file mode 100644
index 0000000..3d238b6
--- /dev/null
+++ b/src/content/config.ts
@@ -0,0 +1,24 @@
+import { defineCollection, z } from 'astro:content';
+
+const menuCollection = defineCollection({
+  type: 'data',
+  schema: z.object({
+    items: z.array(
+      z.object({
+        label: z.string(),
+        href: z.string().optional(),
+        // optional
+        children: z.array(
+          z.object({
+            label: z.string(),
+            href: z.string(),
+          })
+        ).optional(),
+      })
+    )
+  })
+});
+
+export const collections = {
+ 'menu': menuCollection,
+};
\ No newline at end of file
diff --git a/src/content/menu/main.json b/src/content/menu/main.json
new file mode 100644
index 0000000..4d54c8c
--- /dev/null
+++ b/src/content/menu/main.json
@@ -0,0 +1,42 @@
+{
+  "items": [
+    {
+      "label": "Inicio",
+      "href": "/"
+    },
+    {
+      "label": "La Conferencia",
+      "children": [
+        {
+          "label": "Speakers",
+          "href": "/speakers"
+        },
+        {
+          "label": "Agenda",
+          "href": "/agenda"
+        },
+        {
+          "label": "Sede",
+          "href": "/location"
+        }
+      ]
+    },
+    {
+      "label": "Patrocinios",
+      "href": "/sponsorship"
+    },
+    {
+      "label": "Ediciones Anteriores",
+      "children": [
+        {
+          "label": "2025 (Sevilla)",
+          "href": "https://2025.es.pycon.org"
+        },
+        {
+          "label": "2024 (Vigo)",
+          "href": "https://2024.es.pycon.org"
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/src/layouts/Layout.astro b/src/layouts/Layout.astro
index 0c917dc..43a1a95 100644
--- a/src/layouts/Layout.astro
+++ b/src/layouts/Layout.astro
@@ -2,6 +2,7 @@
 import '../style/global.css'
 import '@fontsource-variable/jetbrains-mono'
 import { ClientRouter } from 'astro:transitions'
+import Nav from './components/Nav.astro'
 
 interface Props {
   title: string
@@ -27,8 +28,16 @@ const { title, description = 'PyconES 2026' } = Astro.props
 
   <body
     class="bg-slate-900 text-white antialiased h-screen flex flex-col justify-center bg-linear-to-r from-gray to-blue-900 bg-radial"
-  >
-    <slot />
+    ><a
+      href="#main-content"
+      class="sr-only focus:not-sr-only focus:fixed focus:top-4 focus:left-4 z-50 bg-blue-600 text-white px-4 py-2 rounded shadow-lg font-bold"
+    >
+      Saltar al contenido principal
+    </a>
+    <Nav />
+    <main id="main-content" class="flex-grow">
+      <slot />
+    </main>
   </body>
 </html>
 
diff --git a/src/layouts/components/Nav.astro b/src/layouts/components/Nav.astro
new file mode 100644
index 0000000..d1857f5
--- /dev/null
+++ b/src/layouts/components/Nav.astro
@@ -0,0 +1,204 @@
+---
+import { getEntry } from 'astro:content'
+
+// load menu data
+const menuData = await getEntry('menu', 'main')
+
+if (!menuData) {
+  throw new Error('No se encontró el archivo src/content/menu/main.json')
+}
+
+const { items } = menuData.data
+---
+
+<header class="fixed top-0 w-full z-50 bg-slate-900/90 backdrop-blur-md border-b border-white/10">
+  <div class="container mx-auto px-4 h-20 flex items-center justify-between">
+    <a
+      href="/"
+      class="text-2xl font-bold font-mono text-white focus-visible:ring-2 focus-visible:ring-blue-400 rounded outline-none"
+    >
+      PyCon<span class="text-blue-500">ES</span>
+    </a>
+
+    <button
+      id="mobile-menu-btn"
+      class="lg:hidden text-white p-2 rounded focus-visible:ring-2 focus-visible:ring-blue-400 outline-none"
+      aria-label="Abrir menú principal"
+      aria-expanded="false"
+      aria-controls="nav-menu"
+    >
+      <svg class="w-8 h-8" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+        <path
+          class="menu-icon-path"
+          stroke-linecap="round"
+          stroke-linejoin="round"
+          stroke-width="2"
+          d="M4 6h16M4 12h16m-7 6h7"></path>
+      </svg>
+    </button>
+
+    <nav
+      id="nav-menu"
+      class="hidden absolute top-20 left-0 w-full bg-slate-900 lg:static lg:w-auto lg:bg-transparent lg:flex lg:items-center p-4 lg:p-0 border-b border-white/10 lg:border-none shadow-xl lg:shadow-none"
+    >
+      <ul class="flex flex-col lg:flex-row gap-2 lg:gap-8">
+        {
+          items.map((item, index) => (
+            <li class="relative">
+              {item.children ? (
+                <div class="dropdown-wrapper group">
+                  <button
+                    id={`dbtn-${index}`}
+                    class="dropdown-btn flex items-center gap-1 w-full text-left text-slate-300 hover:text-white font-medium py-2 lg:py-0 transition-colors rounded outline-none focus-visible:text-blue-400 focus-visible:underline decoration-2 underline-offset-4"
+                    aria-expanded="false"
+                    aria-controls={`dmenu-${index}`}
+                    aria-haspopup="true"
+                  >
+                    {item.label}
+                    <svg
+                      class="w-4 h-4 transition-transform duration-200 icon-chevron"
+                      fill="none"
+                      stroke="currentColor"
+                      viewBox="0 0 24 24"
+                    >
+                      <path
+                        stroke-linecap="round"
+                        stroke-linejoin="round"
+                        stroke-width="2"
+                        d="M19 9l-7 7-7-7"
+                      />
+                    </svg>
+                  </button>
+
+                  {/* Dropdown Menu */}
+                  <ul
+                    id={`dmenu-${index}`}
+                    class="dropdown-menu hidden lg:absolute lg:top-full lg:left-0 lg:w-64 bg-slate-900 rounded-lg p-2 mt-2 lg:mt-4 shadow-2xl border border-white/10"
+                  >
+                    {item.children.map((child) => (
+                      <li>
+                        <a
+                          href={child.href}
+                          class="block px-4 py-3 rounded-md text-white font-medium hover:bg-white/5 focus-visible:bg-blue-600 focus-visible:text-white outline-none"
+                        >
+                          {child.label}
+                          {child.description && (
+                            <span class="block text-sm text-slate-400 mt-0.5">{child.description}</span>
+                          )}
+                        </a>
+                      </li>
+                    ))}
+                  </ul>
+                </div>
+              ) : (
+                <a
+                  href={item.href}
+                  class="block text-slate-300 hover:text-white font-medium py-2 lg:py-0 transition-colors rounded outline-none focus-visible:text-blue-400 focus-visible:underline decoration-2 underline-offset-4"
+                >
+                  {item.label}
+                </a>
+              )}
+            </li>
+          ))
+        }
+      </ul>
+    </nav>
+  </div>
+</header>
+
+<script>
+  // Improved logic to comply with WAI-ARIA and the Bootstrap pattern
+  document.addEventListener('astro:page-load', () => {
+    const mobileBtn = document.getElementById('mobile-menu-btn')
+    const navMenu = document.getElementById('nav-menu')
+    const dropdownBtns = document.querySelectorAll('.dropdown-btn')
+
+    // Helper function to close all dropdowns
+    const closeAllDropdowns = () => {
+      dropdownBtns.forEach((btn) => {
+        btn.setAttribute('aria-expanded', 'false')
+        btn.nextElementSibling?.classList.add('hidden')
+        btn.querySelector('.icon-chevron')?.classList.remove('rotate-180')
+      })
+    }
+
+    // 1. Mobile Toggle
+    mobileBtn?.addEventListener('click', (e) => {
+      e.stopPropagation()
+      const isHidden = navMenu?.classList.contains('hidden')
+      navMenu?.classList.toggle('hidden')
+      const isExpanded = !isHidden
+      mobileBtn.setAttribute('aria-expanded', String(isExpanded))
+      mobileBtn.setAttribute('aria-label', isExpanded ? 'Cerrar menú' : 'Abrir menú')
+
+      const path = mobileBtn.querySelector('path')
+      if (isExpanded) {
+        path?.setAttribute('d', 'M6 18L18 6M6 6l12 12')
+      } else {
+        path?.setAttribute('d', 'M4 6h16M4 12h16m-7 6h7')
+      }
+    })
+
+    // 2. Dropdown Logic (Desktop & Mobile)
+    dropdownBtns.forEach((btn) => {
+      btn.addEventListener('click', (e) => {
+        e.stopPropagation() // Prevent immediate closing by click outside
+        const menu = btn.nextElementSibling
+        const icon = btn.querySelector('.icon-chevron')
+        const isExpanded = btn.getAttribute('aria-expanded') === 'true'
+
+        // If desktop, close other menus before opening this one
+        if (window.innerWidth >= 1024 && !isExpanded) {
+          closeAllDropdowns()
+        }
+
+        // Toggle state
+        if (isExpanded) {
+          btn.setAttribute('aria-expanded', 'false')
+          menu?.classList.add('hidden')
+          icon?.classList.remove('rotate-180')
+        } else {
+          btn.setAttribute('aria-expanded', 'true')
+          menu?.classList.remove('hidden')
+          icon?.classList.add('rotate-180')
+        }
+      })
+
+      // Arrow support (optional but recommended by reviewer)
+      btn.addEventListener('keydown', (e) => {
+        if (e.key === 'ArrowDown' || e.key === 'Enter' || e.key === ' ') {
+          e.preventDefault() // Prevent scroll
+          if (btn.getAttribute('aria-expanded') === 'false') btn.click()
+          // Move focus to first element of submenu
+          const firstLink = btn.nextElementSibling?.querySelector('a') as HTMLElement
+          firstLink?.focus()
+        }
+      })
+    })
+
+    // 3. Click Outside (Close all)
+    document.addEventListener('click', (e) => {
+      const target = e.target as Node
+      if (!navMenu?.contains(target) && !mobileBtn?.contains(target)) {
+        // Close mobile menu
+        if (!navMenu?.classList.contains('hidden') && window.innerWidth < 1024) {
+          mobileBtn?.click()
+        }
+        // Close desktop dropdowns
+        closeAllDropdowns()
+      }
+    })
+
+    // 4. ESC Key (Strict WCAG requirement)
+    document.addEventListener('keydown', (e) => {
+      if (e.key === 'Escape') {
+        closeAllDropdowns()
+        // If mobile menu is open, close it
+        if (navMenu && !navMenu.classList.contains('hidden') && window.innerWidth < 1024) {
+          mobileBtn?.click()
+          mobileBtn?.focus()
+        }
+      }
+    })
+  })
+</script>
