Fix three mobile layout issues on the homepage

- Hero CTA: whitespace-nowrap forced the button as wide as the full
  32-char phrase, overflowing the stacked mobile column. Now wraps to
  two lines below lg:, single line from lg: up where there's room.
- Navbar: the account/cart icons are 44px touch targets with the glyph
  centered inside, so the outer gap-2 read as too much space on top of
  that padding. Grouped them with no gap between just the two.
- Divider: "Klarheit -> Fokus -> Entlastung" plus its connector icons
  needs ~550px to fit one row even at the site's 768px fluid floor, far
  more than a phone's ~310px content width. Added a component-scoped
  --divider-word-size (independent from --text-h2) plus a <640px
  override that shrinks the words/icons/gaps together.

app/components/Navbar.tsx

@@ -475,8 +475,18 @@ export function Navbar({ singleActiveProduct }: { singleActiveProduct: boolean }
               (below lg). Grouped so spacing stays consistent as individual
               children hide/show across the three breakpoint tiers. */}
           <div className="flex items-center gap-2">
-            <AccountLink />
-            <CartLink />
+            {/* No gap between these two — each is already a 44px touch
+                target with the icon centered inside, so even gap-0 here
+                still leaves ~20px of visual space between the actual
+                glyphs. The outer gap-2 is what separates this pair from
+                the CTA-buttons/hamburger group that follows, and stays
+                untouched. Fixed 2026-07-24: gap-2 here on top of that
+                built-in padding read as too much space on mobile, where
+                these two icons are the only always-visible controls. */}
+            <div className="flex items-center">
+              <AccountLink />
+              <CartLink />
+            </div>
 
             {/* CTA buttons — inline from md (768px) up, i.e. through both
                 "Collapsed-CTA" and full Desktop tiers */}