Tighten Impressum text blocks and drop Reveal's y-translate jump

AnbieterAngaben.tsx's address/VAT/register blocks each got the same
gap-4 as the section headings, so related lines (e.g. name/street/zip+
city) read as visually disconnected paragraphs instead of one block —
wrapped each in its own gap-1 container, keeping gap-4 only between
sections.

Reveal.tsx's shared fadeUp variant animated opacity and a 28px y-
translate together, which read as the whole section hopping into place
on top of the fade. Renamed to fadeIn, opacity only — applies site-wide
via Reveal/RevealGroup/RevealItem.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/components/Reveal.tsx

@@ -3,9 +3,14 @@
 import { motion, type Variants } from "motion/react";
 import type { CSSProperties, ReactNode } from "react";
 
-const fadeUp: Variants = {
-  hidden: { opacity: 0, y: 28 },
-  show: { opacity: 1, y: 0, transition: { duration: 0.6, ease: [0.22, 1, 0.36, 1] } },
+// Plain fade, no y-translate — fixed 2026-07-24. Used to animate opacity
+// 0→1 *and* y 28→0 together ("fade up"), which read as the whole section
+// visibly hopping/jumping into place on top of the fade — one motion cue
+// too many. The fade alone is already a clear enough "this just appeared"
+// signal without the extra jump.
+const fadeIn: Variants = {
+  hidden: { opacity: 0 },
+  show: { opacity: 1, transition: { duration: 0.6, ease: [0.22, 1, 0.36, 1] } },
 };
 
 type RevealProps = {
@@ -16,7 +21,7 @@ type RevealProps = {
   delay?: number;
 };
 
-/** Fades a section up into place once, the first time it scrolls into view. */
+/** Fades a section into view once, the first time it scrolls into view. */
 export function Reveal({ children, className, style, delay = 0 }: RevealProps) {
   return (
     <motion.div
@@ -25,7 +30,7 @@ export function Reveal({ children, className, style, delay = 0 }: RevealProps) {
       initial="hidden"
       whileInView="show"
       viewport={{ once: true, margin: "-80px" }}
-      variants={fadeUp}
+      variants={fadeIn}
       transition={{ delay }}
     >
       {children}
@@ -53,10 +58,10 @@ export function RevealGroup({ children, className }: { children: ReactNode; clas
   );
 }
 
-/** Child item for use inside a RevealGroup — same fade-up motion, driven by the parent's stagger. */
+/** Child item for use inside a RevealGroup — same fade motion, driven by the parent's stagger. */
 export function RevealItem({ children, className }: { children: ReactNode; className?: string }) {
   return (
-    <motion.div className={className} variants={fadeUp}>
+    <motion.div className={className} variants={fadeIn}>
       {children}
     </motion.div>
   );