feat: modernize mobile bottom nav with 2030 design and fix z-index

components/layout/MobileBottomNav.tsx

@@ -24,8 +24,6 @@ export function MobileBottomNav({ navLinks, currentLocale }: MobileBottomNavProp
     const homeUrl = `/${currentLocale}`;
     
     // Find the specific links from the provided navLinks (which might be translated)
-    // We do a simple match based on index or keywords if needed, but since we know the order:
-    // 0: Kompetenzen, 1: Über uns, 2: Karriere, 3: Messen
     const competenciesUrl = navLinks[0]?.url || `/${currentLocale}/kompetenzen`;
     const aboutUrl = navLinks[1]?.url || `/${currentLocale}/ueber-uns`;
     const contactUrl = `/${currentLocale}/${currentLocale === 'de' ? 'kontakt' : 'contact'}`;
@@ -34,30 +32,30 @@ export function MobileBottomNav({ navLinks, currentLocale }: MobileBottomNavProp
       {
         label: currentLocale === 'de' ? 'Start' : 'Home',
         url: homeUrl,
-        icon: <Home className="w-6 h-6 mb-1" strokeWidth={2} />,
+        icon: <Home className="w-5 h-5 md:w-6 md:h-6" strokeWidth={2.5} />,
         exactMatch: true
       },
       {
         label: navLinks[0]?.label || (currentLocale === 'de' ? 'Kompetenzen' : 'Competencies'),
         url: competenciesUrl,
-        icon: <Briefcase className="w-6 h-6 mb-1" strokeWidth={2} />
+        icon: <Briefcase className="w-5 h-5 md:w-6 md:h-6" strokeWidth={2.5} />
       },
       {
         label: navLinks[1]?.label || (currentLocale === 'de' ? 'Über uns' : 'About Us'),
         url: aboutUrl,
-        icon: <Users className="w-6 h-6 mb-1" strokeWidth={2} />
+        icon: <Users className="w-5 h-5 md:w-6 md:h-6" strokeWidth={2.5} />
       },
       {
         label: currentLocale === 'de' ? 'Kontakt' : 'Contact',
         url: contactUrl,
-        icon: <Mail className="w-6 h-6 mb-1" strokeWidth={2} />
+        icon: <Mail className="w-5 h-5 md:w-6 md:h-6" strokeWidth={2.5} />
       }
     ];
   }, [currentLocale, navLinks]);
 
   return (
-    <div className="md:hidden fixed bottom-0 left-0 right-0 z-50 px-2 pb-2 pt-2 bg-gradient-to-t from-white via-white to-white/90 backdrop-blur-xl border-t border-neutral-200/50 shadow-[0_-8px_32px_rgba(0,0,0,0.05)] safe-area-bottom">
+    <div className="md:hidden fixed bottom-0 left-0 right-0 z-[9999] px-4 pb-[calc(env(safe-area-inset-bottom)+1rem)] pt-4 pointer-events-none flex justify-center">
-      <nav className="flex justify-around items-center max-w-md mx-auto">
+      <nav className="flex justify-between items-center bg-white/70 backdrop-blur-3xl border border-white/60 shadow-[0_8px_32px_rgba(0,0,0,0.12)] rounded-3xl p-1.5 pointer-events-auto w-full max-w-[400px]">
         {items.map((item) => {
           // Determine if active
           const mappedUrl = item.url.startsWith('/') && !item.url.match(/^\/(en|de)/) 
@@ -72,26 +70,34 @@ export function MobileBottomNav({ navLinks, currentLocale }: MobileBottomNavProp
             <TransitionLink 
               key={item.label}
               href={mappedUrl}
-              className={`relative flex flex-col items-center justify-center w-full min-h-[44px] py-1 transition-colors duration-300 select-none ${
+              className={`relative flex flex-col items-center justify-center flex-1 h-[60px] transition-colors duration-300 select-none ${
-                isActive ? 'text-primary' : 'text-neutral-500 hover:text-neutral-900'
+                isActive ? 'text-white' : 'text-neutral-500 hover:text-neutral-900'
               }`}
+              style={{ WebkitTapHighlightColor: 'transparent', touchAction: 'manipulation' }}
             >
-              <div className="relative flex flex-col items-center justify-center">
+              {isActive && (
-                {/* Active Icon Background */}
+                <motion.div
-                {isActive && (
+                  layoutId="mobile-nav-active-bg"
-                  <motion.div
+                  className="absolute inset-0 bg-primary rounded-2xl shadow-md"
-                    layoutId="mobile-nav-active-bg"
+                  transition={{ type: 'spring', stiffness: 400, damping: 25 }}
-                    className="absolute inset-0 bg-primary/10 rounded-full scale-150"
+                />
-                    transition={{ type: 'spring', stiffness: 500, damping: 30 }}
+              )}
-                  />
-                )}
               
-                {/* Icon wrapper to ensure it sits above the background */}
+              <div className="relative flex flex-col items-center justify-center z-10 w-full h-full">
-                <div className="relative z-10 transition-transform duration-300 active:scale-90">
+                <motion.div 
+                  whileTap={{ scale: 0.8 }}
+                  animate={{ y: isActive ? -2 : 0 }}
+                  transition={{ type: 'spring', stiffness: 400, damping: 17 }}
+                >
                   {item.icon}
-                </div>
+                </motion.div>
+                <motion.span 
+                  animate={{ opacity: isActive ? 1 : 0.7, y: isActive ? 0 : 2 }}
+                  className="text-[10px] font-bold mt-1 tracking-wide"
+                >
+                  {item.label}
+                </motion.span>
               </div>
-              <span className="text-[10px] font-semibold mt-0.5 tracking-wide z-10">{item.label}</span>
             </TransitionLink>
           );
         })}