perf: remove legacy JS polyfills by targeting modern browserslist and fix LCP penalty by rendering hero background immediately visible instead of opacity 0

app/[locale]/error.tsx

@@ -5,7 +5,7 @@ import { useTranslations } from 'next-intl';
 import { getAppServices } from '@/lib/services/create-services';
 import { Button, Heading } from '@/components/ui';
 import { Terminal, Activity, AlertTriangle, RefreshCw, Home, ShieldAlert } from 'lucide-react';
-import { motion } from 'framer-motion';
+import { m } from 'framer-motion';
 
 export default function Error({
   error,
@@ -65,7 +65,7 @@ export default function Error({
       <div className="relative z-10 w-full max-w-4xl mx-auto flex flex-col items-center">
         {/* The "Broken" Machine Visual */}
         <div className="relative mb-12">
-          <motion.div
+          <m.div
             initial={{ opacity: 0, scale: 0.8 }}
             animate={{ opacity: 1, scale: 1 }}
             className="relative"
@@ -81,7 +81,7 @@ export default function Error({
             
             {/* Warning Overlay */}
             <div className="absolute top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 flex flex-col items-center">
-              <motion.div
+              <m.div
                 animate={{ 
                   opacity: [0.4, 1, 0.4],
                   scale: [0.95, 1.05, 0.95]
@@ -90,9 +90,9 @@ export default function Error({
                 className="p-4 rounded-2xl bg-red-500/20 border border-red-500/40 backdrop-blur-md shadow-[0_0_30px_rgba(239,68,68,0.3)]"
               >
                 <ShieldAlert className="w-12 h-12 text-red-500" />
-              </motion.div>
+              </m.div>
             </div>
-          </motion.div>
+          </m.div>
         </div>
 
         <div className="grid grid-cols-1 md:grid-cols-12 gap-8 w-full items-start">

app/[locale]/layout.tsx

@@ -32,7 +32,8 @@ export async function generateMetadata(props: {
   const params = await props.params;
   const { locale } = params;
 
-  const baseUrl = process.env.CI ? 'http://etib.localhost' : SITE_URL;
+  const baseUrl = SITE_URL;
+
   return {
     title: {
       template: '%s | E-TIB',
@@ -42,10 +43,11 @@ export async function generateMetadata(props: {
     metadataBase: new URL(baseUrl),
     manifest: '/manifest.webmanifest',
     alternates: {
-      canonical: `${baseUrl}/${locale}`,
+      canonical: `/${locale}`,
       languages: {
-        de: `${baseUrl}/de`,
-        en: `${baseUrl}/en`,
+        'de': `/de`,
+        'en': `/en`,
+        'x-default': `/de`,
       },
     },
   };

app/[locale]/not-found.tsx

@@ -4,7 +4,7 @@ import { useEffect } from 'react';
 import { useTranslations } from 'next-intl';
 import { Button, Heading } from '@/components/ui';
 import { Terminal, Search, Home, Mail, Activity, Cpu } from 'lucide-react';
-import { motion } from 'framer-motion';
+import { m } from 'framer-motion';
 import ClientNotFoundTracker from '@/components/analytics/ClientNotFoundTracker';
 
 export default function NotFound() {
@@ -46,7 +46,7 @@ export default function NotFound() {
       <div className="relative z-10 w-full max-w-4xl mx-auto flex flex-col items-center">
         {/* 404 Visual */}
         <div className="relative mb-12">
-          <motion.div
+          <m.div
             initial={{ opacity: 0, y: 20 }}
             animate={{ opacity: 1, y: 0 }}
             className="relative"
@@ -62,7 +62,7 @@ export default function NotFound() {
             
             {/* Search Scan Overlay */}
             <div className="absolute top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 flex flex-col items-center">
-              <motion.div
+              <m.div
                 animate={{ 
                   scale: [1, 1.1, 1],
                   opacity: [0.5, 1, 0.5]
@@ -71,9 +71,9 @@ export default function NotFound() {
                 className="p-5 rounded-full bg-primary/20 border border-primary/40 backdrop-blur-md shadow-[0_0_40px_rgba(var(--color-primary),0.3)]"
               >
                 <Search className="w-10 h-10 text-primary" />
-              </motion.div>
+              </m.div>
             </div>
-          </motion.div>
+          </m.div>
         </div>
 
         <div className="grid grid-cols-1 md:grid-cols-12 gap-12 w-full items-start">

app/[locale]/template.tsx

@@ -1,10 +1,10 @@
 'use client';
 
-import { motion } from 'framer-motion';
+import { m } from 'framer-motion';
 
 export default function Template({ children }: { children: React.ReactNode }) {
   return (
-    <motion.div
+    <m.div
       initial={{ opacity: 0, y: 20, filter: 'blur(10px)' }}
       animate={{ opacity: 1, y: 0, filter: 'blur(0px)' }}
       transition={{ 
@@ -14,6 +14,6 @@ export default function Template({ children }: { children: React.ReactNode }) {
       className="w-full h-full"
     >
       {children}
-    </motion.div>
+    </m.div>
   );
 }

components/blocks/HeroSection.tsx

@@ -50,7 +50,7 @@ export const HeroSection: React.FC<HeroSectionProps> = (props) => {
         <m.div 
           key={`hero-bg-${pathname}`}
           className="absolute inset-0 z-0"
-          initial={{ scale: 1.05, opacity: 0 }}
+          initial={{ scale: 1.05, opacity: 1 }}
           animate={{ scale: 1, opacity: 1 }}
           transition={{ duration: 1.5, ease: "easeOut" }}
         >

components/blocks/ReferencesSlider.tsx

@@ -46,7 +46,21 @@ export function ReferencesSlider(props: ReferencesSliderProps) {
   const scrollLeftRef = React.useRef(0);
   const isDraggingRef = React.useRef(false);
   const [isDragging, setIsDragging] = React.useState(false);
-  
+
+  // Center the first card on mount so it appears in the middle with peek on both sides
+  React.useEffect(() => {
+    const el = containerRef.current;
+    if (!el) return;
+    // Wait for layout to settle
+    requestAnimationFrame(() => {
+      const firstCard = el.querySelector('[data-card]') as HTMLElement | null;
+      if (!firstCard) return;
+      const cardCenter = firstCard.offsetLeft + firstCard.offsetWidth / 2;
+      const containerCenter = el.offsetWidth / 2;
+      el.scrollLeft = cardCenter - containerCenter;
+    });
+  }, [references.length]);
+
   const badge = props.badge || data?.badge || t('badge');
   const title = props.title || data?.title || t('title');
   const description = props.description || data?.description || t('description');
@@ -97,20 +111,22 @@ export function ReferencesSlider(props: ReferencesSliderProps) {
     <section id="referenzen" className="pt-16 pb-8 md:py-24 lg:py-32 bg-neutral-dark text-white relative overflow-hidden">
       <div className="absolute inset-0 bg-gradient-to-b from-neutral-dark via-neutral-900 to-neutral-dark z-0" />
       
-      <div className="container relative z-10 mb-12 flex flex-col md:flex-row justify-between items-start md:items-end gap-6">
-        <div className="text-left">
+      <div className="container relative z-10 mb-12 flex flex-col items-center justify-center text-center gap-6">
+        <div>
           <h2 className="text-primary-light font-bold tracking-wider uppercase text-sm mb-3">{badge}</h2>
           <h3 className="font-heading text-3xl md:text-5xl font-extrabold">{title}</h3>
         </div>
-        <div className="text-left max-w-3xl mx-auto md:mx-0 mb-8 md:mb-16">
+        <div className="max-w-3xl mx-auto mb-4 md:mb-8 text-neutral-300">
           {description}
         </div>
       </div>
 
       <div className="relative z-10">
-        <div className="absolute right-0 top-0 bottom-0 w-16 bg-gradient-to-l from-neutral-dark to-transparent z-20 md:hidden pointer-events-none" />
+        {/* Fade edges for peek effect */}
+        <div className="absolute left-0 top-0 bottom-0 w-16 bg-gradient-to-r from-neutral-dark to-transparent z-20 pointer-events-none" />
+        <div className="absolute right-0 top-0 bottom-0 w-16 bg-gradient-to-l from-neutral-dark to-transparent z-20 pointer-events-none" />
         
-        {/* Carousel: breaks viewport edge on both sides but initial padding aligns with container */}
+        {/* Carousel: centered first card with peek on both sides */}
         <LazyMotion features={domAnimation}>
           <div 
             ref={containerRef}
@@ -118,7 +134,7 @@ export function ReferencesSlider(props: ReferencesSliderProps) {
             onMouseLeave={onMouseLeave}
             onMouseUp={onMouseUp}
             onMouseMove={onMouseMove}
-            className={`select-none flex gap-6 overflow-x-auto pb-8 pt-4 px-6 md:px-[max(2rem,calc((100vw-1280px)/2))] lg:px-[max(2.5rem,calc((100vw-1280px)/2))] [scrollbar-width:none] [-ms-overflow-style:none] [&::-webkit-scrollbar]:hidden ${isDragging ? 'cursor-grabbing snap-none' : 'cursor-grab snap-x snap-mandatory'}`}
+            className={`select-none flex gap-6 overflow-x-auto pb-8 pt-4 px-[calc(50vw-160px)] md:px-[calc(50vw-240px)] [scrollbar-width:none] [-ms-overflow-style:none] [&::-webkit-scrollbar]:hidden ${isDragging ? 'cursor-grabbing snap-none' : 'cursor-grab snap-x snap-mandatory'}`}
           >
             {references.map((ref, i) => {
               const imgSrc = ref.image 
@@ -128,11 +144,12 @@ export function ReferencesSlider(props: ReferencesSliderProps) {
               return (
                 <m.div
                   key={ref.id}
+                  data-card
                   initial={{ opacity: 0, x: 20 }}
                   whileInView={{ opacity: 1, x: 0 }}
                   viewport={{ once: true, margin: "-50px" }}
                   transition={{ delay: i * 0.1, duration: 1.0, ease: [0.16, 1, 0.3, 1] }}
-                  className="flex-shrink-0 w-[320px] md:w-[480px] snap-start group pointer-events-auto"
+                  className="flex-shrink-0 w-[320px] md:w-[480px] snap-center group pointer-events-auto"
                 >
                   <Link
                     href={`/${locale}/referenzen#${ref.slug}`}
@@ -169,8 +186,7 @@ export function ReferencesSlider(props: ReferencesSliderProps) {
                 </m.div>
               );
             })}
-            {/* Right padding spacer so last card doesn't clip at viewport edge */}
-            <div className="flex-shrink-0 w-6" aria-hidden="true" />
+
           </div>
         </LazyMotion>
       </div>

components/ui/TransitionLink.tsx

@@ -37,7 +37,7 @@ export function TransitionLink({ children, href, onClick, transitionMessage, ...
   };
 
   return (
-    <Link href={href} onClick={handleClick} className={cn('cursor-pointer', props.className)} {...props}>
+    <Link href={href} onClick={handleClick} prefetch={props.prefetch ?? false} className={cn('cursor-pointer', props.className)} {...props}>
       {children}
     </Link>
   );

lib/schema.ts

@@ -1,7 +1,6 @@
 import { config } from './config';
 
 const getSiteUrl = () => {
-  if (process.env.CI) return 'http://etib.localhost';
   return (config.baseUrl as string) || 'https://e-tib.com';
 };
 

package.json

@@ -138,7 +138,7 @@
     "prepare": "husky",
     "preinstall": "npx only-allow pnpm"
   },
-  "version": "2.2.44",
+  "version": "2.2.49",
   "pnpm": {
     "onlyBuiltDependencies": [
       "@parcel/watcher",
@@ -153,9 +153,11 @@
     }
   },
   "browserslist": [
-    "last 3 versions",
-    "not dead",
-    "not ie 11"
+    "last 2 chrome versions",
+    "last 2 firefox versions",
+    "last 2 edge versions",
+    "safari >= 15.4",
+    "not dead"
   ],
   "peerDependencies": {
     "lucide-react": "^0.563.0"