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/ServiceDetailGrid.tsx

@@ -193,7 +193,7 @@ export function ServiceDetailGrid({
                 {/* On a white card, a very subtle primary/grey shine works best */}
                 <HoverShineOverlay shineColor="via-primary/5" />
 
-                <div className="relative z-10 flex flex-col md:flex-row justify-between items-start mb-12 gap-6">
+                <div className="relative z-10 flex flex-row justify-between items-start mb-12 gap-6">
                   <div className="pt-2 flex-1 min-w-0 pr-4">
                     <h4 className="text-lg md:text-2xl font-extrabold text-neutral-dark uppercase tracking-wider text-balance break-words" lang="de">{panel.title}</h4>
                     <div className="h-1 w-12 bg-primary mt-6 transition-all duration-700 group-hover:w-24 rounded-full"></div>