feat: navbar responsive avec menu hamburger mobile

- Création composant MobileMenu.jsx avec React
- Menu slide-in depuis la droite
- Animation hamburger vers X
- Overlay semi-transparent
- Navigation desktop/mobile adaptative
- Design minimal et élégant

src/components/MobileMenu.jsx

@@ -0,0 +1,100 @@
+import { useState } from 'react';
+
+export default function MobileMenu({ currentPath }) {
+    const [isOpen, setIsOpen] = useState(false);
+
+    const links = [
+        { href: '/', label: 'Home' },
+        { href: '/about', label: 'About' },
+        { href: '/contact', label: 'Contact' },
+    ];
+
+    return (
+        <>
+            {/* Hamburger Button */}
+            <button
+                onClick={() => setIsOpen(!isOpen)}
+                className="md:hidden flex flex-col gap-1.5 p-2 hover:bg-gray-100 rounded transition-colors"
+                aria-label="Toggle menu"
+            >
+                <span
+                    className={`block w-6 h-0.5 bg-gray-900 transition-transform ${isOpen ? 'rotate-45 translate-y-2' : ''
+                        }`}
+                />
+                <span
+                    className={`block w-6 h-0.5 bg-gray-900 transition-opacity ${isOpen ? 'opacity-0' : ''
+                        }`}
+                />
+                <span
+                    className={`block w-6 h-0.5 bg-gray-900 transition-transform ${isOpen ? '-rotate-45 -translate-y-2' : ''
+                        }`}
+                />
+            </button>
+
+            {/* Mobile Menu Overlay */}
+            {isOpen && (
+                <div
+                    className="fixed inset-0 bg-black/20 z-40 md:hidden"
+                    onClick={() => setIsOpen(false)}
+                />
+            )}
+
+            {/* Mobile Menu Panel */}
+            <div
+                className={`fixed top-0 right-0 h-full w-64 bg-white shadow-xl z-50 transform transition-transform duration-300 md:hidden ${isOpen ? 'translate-x-0' : 'translate-x-full'
+                    }`}
+            >
+                <div className="flex flex-col h-full">
+                    {/* Header */}
+                    <div className="flex items-center justify-between p-6 border-b border-gray-200">
+                        <span className="text-lg font-semibold text-gray-900">Menu</span>
+                        <button
+                            onClick={() => setIsOpen(false)}
+                            className="p-2 hover:bg-gray-100 rounded transition-colors"
+                            aria-label="Close menu"
+                        >
+                            <svg
+                                className="w-6 h-6"
+                                fill="none"
+                                stroke="currentColor"
+                                viewBox="0 0 24 24"
+                            >
+                                <path
+                                    strokeLinecap="round"
+                                    strokeLinejoin="round"
+                                    strokeWidth={2}
+                                    d="M6 18L18 6M6 6l12 12"
+                                />
+                            </svg>
+                        </button>
+                    </div>
+
+                    {/* Navigation Links */}
+                    <nav className="flex-1 p-6">
+                        <ul className="space-y-4">
+                            {links.map((link) => (
+                                <li key={link.href}>
+                                    <a
+                                        href={link.href}
+                                        className={`block py-3 px-4 rounded-lg text-base font-medium transition-colors ${currentPath === link.href
+                                                ? 'bg-gray-900 text-white'
+                                                : 'text-gray-700 hover:bg-gray-100'
+                                            }`}
+                                        onClick={() => setIsOpen(false)}
+                                    >
+                                        {link.label}
+                                    </a>
+                                </li>
+                            ))}
+                        </ul>
+                    </nav>
+
+                    {/* Footer */}
+                    <div className="p-6 border-t border-gray-200">
+                        <p className="text-xs text-gray-500">Astro Starter Kit</p>
+                    </div>
+                </div>
+            </div>
+        </>
+    );
+}

src/components/Navbar.astro

@@ -1,4 +1,6 @@
 ---
+import MobileMenu from "./MobileMenu.jsx";
+
 const currentPath = Astro.url.pathname;
 ---
 
@@ -12,7 +14,8 @@ const currentPath = Astro.url.pathname;
                 Starter Kit
             </a>
 
-            <div class="flex gap-8">
+            {/* Desktop Navigation */}
+            <div class="hidden md:flex gap-8">
                 <a
                     href="/"
                     class:list={[
@@ -47,6 +50,9 @@ const currentPath = Astro.url.pathname;
                     Contact
                 </a>
             </div>
+
+            {/* Mobile Menu */}
+            <MobileMenu currentPath={currentPath} client:load />
         </div>
     </div>
 </nav>