fix(ui): comprehensive mobile optimizations across homepage and blocks

- fix: bottom nav and footer padding collision
- fix: reveal animation flickering (Certificates, SubCompanyTiles)
- fix: tooltip flyout overflow on mobile in Germany map
- fix: flex direction for 'Projekt anfragen' and Service Detail icons
- fix: text alignment and spacing issues in ReferencesSlider
- fix: reduce excessive whitespace above footer

components/blocks/ReferencesSlider.tsx

@@ -97,12 +97,12 @@ export function ReferencesSlider(props: ReferencesSliderProps) {
     <section id="referenzen" className="py-16 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-end gap-6">
-        <div>
+      <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">
           <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-center md:text-left max-w-3xl mx-auto md:mx-0 mb-16">
+        <div className="text-left max-w-3xl mx-auto md:mx-0 mb-8 md:mb-16">
           {description}
         </div>
       </div>