diff --git a/Dockerfile b/Dockerfile
index 4129504..c3217c8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,11 +7,23 @@ ARG NEXT_PUBLIC_BASE_URL
 ARG NEXT_PUBLIC_TARGET
 ARG UMAMI_API_ENDPOINT
 ARG NPM_TOKEN
+ARG S3_ENDPOINT
+ARG S3_ACCESS_KEY
+ARG S3_SECRET_KEY
+ARG S3_BUCKET
+ARG S3_REGION
+ARG S3_PREFIX
 
 # Environment variables for Next.js build
 ENV NEXT_PUBLIC_BASE_URL=$NEXT_PUBLIC_BASE_URL
 ENV NEXT_PUBLIC_TARGET=$NEXT_PUBLIC_TARGET
 ENV UMAMI_API_ENDPOINT=$UMAMI_API_ENDPOINT
+ENV S3_ENDPOINT=$S3_ENDPOINT
+ENV S3_ACCESS_KEY=$S3_ACCESS_KEY
+ENV S3_SECRET_KEY=$S3_SECRET_KEY
+ENV S3_BUCKET=$S3_BUCKET
+ENV S3_REGION=$S3_REGION
+ENV S3_PREFIX=$S3_PREFIX
 ENV SKIP_RUNTIME_ENV_VALIDATION=true
 ENV CI=true
 
diff --git a/apps/web/app/(payload)/admin/importMap.js b/apps/web/app/(payload)/admin/importMap.js
index 829d6dd..5deabbc 100644
--- a/apps/web/app/(payload)/admin/importMap.js
+++ b/apps/web/app/(payload)/admin/importMap.js
@@ -32,6 +32,7 @@ import { default as default_2ebf44fdf8ebc607cf0de30cff485248 } from "@/src/paylo
 import { default as default_a1c6da8fb7dd9846a8b07123ff256d09 } from "@/src/payload/components/IconSelector";
 import { ConvertInquiryButton as ConvertInquiryButton_09fd670bce023a947ab66e4eebea5168 } from "@/src/payload/components/ConvertInquiryButton";
 import { AiAnalyzeButton as AiAnalyzeButton_51a6009c2b12d068d736ffd2b8182c71 } from "@/src/payload/components/AiAnalyzeButton";
+import { BulkMailButton as BulkMailButton_ebc54eabb8a07878581b0043bd687708 } from "@/src/payload/components/BulkMailButton";
 import { GanttChartView as GanttChartView_0162b82db971e8f1e27fbdd0aaa2f1f4 } from "@/src/payload/views/GanttChart";
 import { ChatWindowProvider as ChatWindowProvider_258e2d0901cb901e46c3eeed91676211 } from "@mintel/payload-ai/components/ChatWindow/index";
 import { S3ClientUploadHandler as S3ClientUploadHandler_f97aa6c64367fa259c5bc0567239ef24 } from "@payloadcms/storage-s3/client";
@@ -106,6 +107,8 @@ export const importMap = {
     ConvertInquiryButton_09fd670bce023a947ab66e4eebea5168,
   "@/src/payload/components/AiAnalyzeButton#AiAnalyzeButton":
     AiAnalyzeButton_51a6009c2b12d068d736ffd2b8182c71,
+  "@/src/payload/components/BulkMailButton#BulkMailButton":
+    BulkMailButton_ebc54eabb8a07878581b0043bd687708,
   "@/src/payload/views/GanttChart#GanttChartView":
     GanttChartView_0162b82db971e8f1e27fbdd0aaa2f1f4,
   "@mintel/payload-ai/components/ChatWindow/index#ChatWindowProvider":
diff --git a/apps/web/app/(site)/globals.css b/apps/web/app/(site)/globals.css
index 0cc8d11..4a3ff14 100644
--- a/apps/web/app/(site)/globals.css
+++ b/apps/web/app/(site)/globals.css
@@ -24,19 +24,19 @@
   }
 
   h1 {
-    @apply text-4xl md:text-8xl leading-[1.1] md:leading-[0.95] mb-6 md:mb-12;
+    @apply text-4xl md:text-6xl lg:text-8xl leading-[1.1] md:leading-[1] lg:leading-[0.95] mb-6 md:mb-8 lg:mb-12;
   }
 
   h2 {
-    @apply text-2xl md:text-6xl leading-tight mb-4 md:mb-8 mt-12 md:mt-16;
+    @apply text-2xl md:text-4xl lg:text-6xl leading-tight mb-4 md:mb-6 lg:mb-8 mt-12 lg:mt-16;
   }
 
   h3 {
-    @apply text-xl md:text-5xl leading-tight mb-3 md:mb-6 mt-8 md:mt-12;
+    @apply text-xl md:text-3xl lg:text-5xl leading-tight mb-3 md:mb-4 lg:mb-6 mt-8 lg:mt-12;
   }
 
   h4 {
-    @apply text-lg md:text-3xl leading-tight mb-3 md:mb-4 mt-6 md:mt-8;
+    @apply text-lg md:text-2xl lg:text-3xl leading-tight mb-3 lg:mb-4 mt-6 lg:mt-8;
   }
 
   p {
@@ -44,7 +44,7 @@
   }
 
   .lead {
-    @apply text-base md:text-2xl text-slate-600 mb-6 leading-relaxed;
+    @apply text-base md:text-xl lg:text-2xl text-slate-600 mb-6 leading-relaxed;
     font-weight: 400;
   }
 
@@ -92,15 +92,15 @@
   }
 
   .container {
-    @apply max-w-6xl mx-auto px-5 md:px-6 py-8 md:py-12;
+    @apply max-w-6xl mx-auto px-5 md:px-6 lg:px-8 py-8 md:py-10 lg:py-12;
   }
 
   .wide-container {
-    @apply max-w-7xl mx-auto px-5 md:px-6 py-10 md:py-16;
+    @apply max-w-7xl mx-auto px-5 md:px-6 lg:px-8 py-10 md:py-12 lg:py-16;
   }
 
   .narrow-container {
-    @apply max-w-4xl mx-auto px-5 md:px-6 py-6 md:py-10;
+    @apply max-w-4xl mx-auto px-5 md:px-6 lg:px-8 py-6 md:py-8 lg:py-10;
   }
 
   .highlighter-tag {
diff --git a/apps/web/app/(site)/page.tsx b/apps/web/app/(site)/page.tsx
index 288db31..8ef5edc 100644
--- a/apps/web/app/(site)/page.tsx
+++ b/apps/web/app/(site)/page.tsx
@@ -50,7 +50,7 @@ export default function LandingPage() {
             </H3>
           </Reveal>
 
-          <div className="grid grid-cols-1 md:grid-cols-2 gap-8 relative z-10">
+          <div className="grid grid-cols-1 md:grid-cols-1 lg:grid-cols-2 gap-8 lg:gap-12 relative z-10">
             {[
               {
                 icon: <ConceptCommunication className="w-8 h-8" />,
@@ -136,7 +136,7 @@ export default function LandingPage() {
 
       {/* Section 04: Target Group */}
       <Section number="04" title="Für wen" borderTop>
-        <div className="grid grid-cols-1 md:grid-cols-2 gap-4 md:gap-6 relative z-10">
+        <div className="grid grid-cols-1 md:grid-cols-1 lg:grid-cols-2 gap-4 md:gap-6 lg:gap-10 relative z-10">
           <Reveal>
             <Card variant="glass" padding="normal" techBorder className="group">
               <div className="space-y-4 md:space-y-6 relative overflow-hidden">
@@ -215,8 +215,8 @@ export default function LandingPage() {
             },
           ].map((service, i) => (
             <Reveal key={i} delay={0.1 + i * 0.15}>
-              <div className="group py-8 md:py-16 border-b border-slate-100 last:border-b-0 cursor-pointer transition-all duration-500">
-                <div className="flex flex-col md:flex-row md:items-start gap-6 md:gap-16">
+              <div className="group py-8 md:py-12 lg:py-16 border-b border-slate-100 last:border-b-0 cursor-pointer transition-all duration-500">
+                <div className="flex flex-col md:flex-row md:items-start gap-6 md:gap-10 lg:gap-16">
                   {/* Number + Binary */}
                   <div className="shrink-0 flex md:block items-baseline gap-4">
                     <span className="text-4xl md:text-6xl font-black text-slate-100 group-hover:text-slate-200 transition-colors duration-500 tracking-tighter block leading-none">
@@ -280,13 +280,13 @@ export default function LandingPage() {
       <Section number="06" title="Kontakt" borderTop>
         <div className="relative py-4 md:py-12" id="contact">
           <Reveal>
-            <div className="space-y-8 md:space-y-16">
-              <H1 className="text-3xl md:text-8xl">
+            <div className="space-y-8 md:space-y-12 lg:space-y-16">
+              <H1 className="text-4xl md:text-6xl lg:text-8xl">
                 Lassen Sie uns <br />
                 <span className="text-slate-400">starten.</span>
               </H1>
 
-              <div className="flex flex-col md:flex-row gap-6 md:gap-16 items-start relative z-10">
+              <div className="flex flex-col md:flex-row gap-6 md:gap-10 lg:gap-16 items-start relative z-10">
                 <div className="space-y-4 md:space-y-8 flex-1">
                   <LeadText className="text-lg md:text-3xl text-slate-400">
                     Beschreiben Sie kurz Ihr Vorhaben. Ich melde mich{" "}
diff --git a/apps/web/src/components/HeroSection.tsx b/apps/web/src/components/HeroSection.tsx
index be3f69a..3e86432 100644
--- a/apps/web/src/components/HeroSection.tsx
+++ b/apps/web/src/components/HeroSection.tsx
@@ -47,7 +47,7 @@ export const HeroSection: React.FC = () => {
             initial={{ opacity: 0, scale: 0.95 }}
             animate={{ opacity: 1, scale: 1 }}
             transition={{ duration: 1, delay: 0.2 }}
-            className="mb-4 md:mb-10 inline-flex items-center gap-3 md:gap-4 px-4 md:px-6 py-2 border border-slate-100 bg-white/40 backdrop-blur-sm rounded-full"
+            className="mb-4 md:mb-8 lg:mb-10 inline-flex items-center gap-3 md:gap-4 px-4 md:px-6 py-2 border border-slate-100 bg-white/40 backdrop-blur-sm rounded-full"
           >
             <div className="flex gap-1">
               <div className="w-1 h-1 rounded-full bg-blue-500 animate-pulse" />
@@ -59,7 +59,7 @@ export const HeroSection: React.FC = () => {
           </motion.div>
 
           {/* Headline */}
-          <h1 className="text-3xl md:text-[11rem] font-black tracking-tighter leading-[0.9] md:leading-[0.8] text-slate-900 mb-6 md:mb-12 uppercase">
+          <h1 className="text-4xl md:text-8xl lg:text-[10rem] xl:text-[11rem] font-black tracking-tighter leading-[0.9] md:leading-[0.85] lg:leading-[0.8] text-slate-900 mb-6 md:mb-8 lg:mb-12 uppercase">
             <div className="block">
               <GlitchText delay={0.5} duration={1.2}>
                 Websites
@@ -80,9 +80,9 @@ export const HeroSection: React.FC = () => {
             initial={{ opacity: 0, y: 20 }}
             animate={{ opacity: 1, y: 0 }}
             transition={{ duration: 1, delay: 0.8 }}
-            className="flex flex-col items-center gap-6 md:gap-12"
+            className="flex flex-col items-center gap-6 md:gap-8 lg:gap-12"
           >
-            <p className="text-base md:text-3xl text-slate-400 font-medium max-w-2xl leading-relaxed px-4">
+            <p className="text-base md:text-xl lg:text-3xl text-slate-400 font-medium max-w-2xl leading-relaxed px-4">
               Ein Entwickler. Ein Ansprechpartner.{" "}
               <br className="hidden md:block" />
               <span className="text-slate-900 font-bold tracking-tight">
diff --git a/apps/web/src/components/Section.tsx b/apps/web/src/components/Section.tsx
index 8aeffc5..01efa55 100644
--- a/apps/web/src/components/Section.tsx
+++ b/apps/web/src/components/Section.tsx
@@ -82,9 +82,9 @@ export const Section: React.FC<SectionProps> = ({
 
       <div className={cn("relative z-10", containerClass)}>
         {hasSidebar ? (
-          <div className="grid grid-cols-1 md:grid-cols-12 gap-4 md:gap-24">
+          <div className="grid grid-cols-1 md:grid-cols-12 gap-4 md:gap-12 lg:gap-24">
             {/* Sidebar: Number & Title */}
-            <div className="md:col-span-3">
+            <div className="md:col-span-4 lg:col-span-3">
               <div className="md:sticky md:top-40 flex flex-col gap-4 md:gap-8">
                 <div className="flex items-end md:flex-col md:items-start gap-6 md:gap-8">
                   {number && (
@@ -124,7 +124,7 @@ export const Section: React.FC<SectionProps> = ({
             </div>
 
             {/* Main Content */}
-            <div className="md:col-span-9">{children}</div>
+            <div className="md:col-span-8 lg:col-span-9">{children}</div>
           </div>
         ) : (
           <div className="w-full">{children}</div>
diff --git a/apps/web/src/lib/env.ts b/apps/web/src/lib/env.ts
index 74f3532..0d83d0f 100644
--- a/apps/web/src/lib/env.ts
+++ b/apps/web/src/lib/env.ts
@@ -8,8 +8,8 @@ const envExtension = {
   // Mail Configuration
   MAIL_HOST: z.string().optional(),
   MAIL_PORT: z.coerce.number().optional().default(587),
-  MAIL_USER: z.string().optional(),
-  MAIL_PASS: z.string().optional(),
+  MAIL_USERNAME: z.string().optional(),
+  MAIL_PASSWORD: z.string().optional(),
   MAIL_FROM: z.string().optional().default("marc@mintel.me"),
   MAIL_RECIPIENTS: z.string().optional().default("marc@mintel.me"),
 
@@ -21,6 +21,14 @@ const envExtension = {
     .optional()
     .default("https://analytics.infra.mintel.me"),
 
+  // S3 Storage (Required for importMap at build-time)
+  S3_ENDPOINT: z.string().optional(),
+  S3_ACCESS_KEY: z.string().optional(),
+  S3_SECRET_KEY: z.string().optional(),
+  S3_BUCKET: z.string().optional(),
+  S3_REGION: z.string().optional(),
+  S3_PREFIX: z.string().optional(),
+
   // Error Tracking
   SENTRY_DSN: z.string().optional(),
 };
diff --git a/apps/web/src/lib/mail/mailer.ts b/apps/web/src/lib/mail/mailer.ts
index 3e09033..50440a2 100644
--- a/apps/web/src/lib/mail/mailer.ts
+++ b/apps/web/src/lib/mail/mailer.ts
@@ -24,8 +24,8 @@ function getTransporter() {
     port: env.MAIL_PORT,
     secure: env.MAIL_PORT === 465,
     auth: {
-      user: env.MAIL_USER,
-      pass: env.MAIL_PASS,
+      user: env.MAIL_USERNAME,
+      pass: env.MAIL_PASSWORD,
     },
   });
 
diff --git a/apps/web/test-env.ts b/apps/web/test-env.ts
new file mode 100644
index 0000000..6f310f2
--- /dev/null
+++ b/apps/web/test-env.ts
@@ -0,0 +1,18 @@
+import { z } from "zod";
+import { validateMintelEnv } from "@mintel/next-utils";
+
+const envExtension = {
+  SENTRY_DSN: z.string().url().nullish().or(z.literal("")),
+};
+
+process.env.SENTRY_DSN = " ";
+console.log("Empty Space:");
+try {
+  validateMintelEnv(envExtension);
+} catch (e) {}
+
+process.env.SENTRY_DSN = "\n";
+console.log("Newline:");
+try {
+  validateMintelEnv(envExtension);
+} catch (e) {}