style(design): consistency sweep + UX upgrades

- Palette: gray/zinc/slate/neutral → stein, red → fire, amber → erde,
  sky → himmel, green → wald
- Footer: replaced raw rgb with stein tokens
- Radius: unified to rounded-xs across cards, buttons, inputs, pagination
- Buttons: .btn-primary/.btn-secondary now font-medium; added secondary
- Card hover: -translate-y-0.5 + shadow + wald-300 border
- Header active link: wald border-bottom + wald-700 text
- Mobile nav: bigger touch targets + wald active accent
- Pagination: prev/next text labels + wald-500 active state with
  separated shape/color classes to avoid Tailwind conflicts
- Lead paragraph: scoped .markdown > p:first-child for top-level
  MarkdownBlock only via [data-block-type="markdown"]
- Section dividers: subtle wald-200 gradient between content rows
- Global focus-visible ring (wald-500)
- Inline hex → palette tokens (Badge amber, Tag custom-color contrast)
- Font weights snapped to design system (300/400/500/600/700)
- transition-all → transition-colors where only color changes
- Removed em-dashes from user-visible templates

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/routes/+error.svelte

@@ -17,27 +17,27 @@
 
 <section>
   <div class="container-custom pt-10 text-center">
-    <p class="mt-6 text-7xl md:text-8xl font-extrabold tracking-tight text-wald-700">{status}</p>
-    <h1 class="mt-3 text-2xl md:text-3xl font-semibold text-zinc-900">
+    <p class="mt-6 text-7xl md:text-8xl font-bold tracking-tight text-wald-700">{status}</p>
+    <h1 class="mt-3 text-2xl md:text-3xl font-semibold text-stein-900">
       {isNotFound ? t('page_404_title') : `Fehler ${status}`}
     </h1>
     {#if isNotFound}
-      <p class="mx-auto mt-4 max-w-xl text-base text-zinc-600">{t('page_404_text')}</p>
+      <p class="mx-auto mt-4 max-w-xl text-base text-stein-600">{t('page_404_text')}</p>
     {:else if message}
-      <p class="mx-auto mt-4 max-w-xl text-base text-zinc-600">{message}</p>
+      <p class="mx-auto mt-4 max-w-xl text-base text-stein-600">{message}</p>
     {/if}
 
     <div class="mt-8 flex flex-wrap items-center justify-center gap-3">
       <a
         href="/"
-        class="inline-flex items-center gap-2 rounded-sm bg-wald-700 px-5 py-2.5 text-sm font-medium text-white hover:bg-wald-800 no-underline"
+        class="btn-primary inline-flex items-center gap-2 text-sm font-medium"
       >
         <Icon icon="mdi:home-outline" class="h-4 w-4" />
         {t('page_404_back')}
       </a>
       <a
         href="/posts/"
-        class="inline-flex items-center gap-2 rounded-sm border border-zinc-300 bg-white px-5 py-2.5 text-sm font-medium text-zinc-700 hover:bg-zinc-100 no-underline"
+        class="btn-secondary inline-flex items-center gap-2 text-sm font-medium"
       >
         <Icon icon="mdi:file-document-outline" class="h-4 w-4" />
         Zu den Beiträgen

src/routes/+layout.svelte

@@ -271,18 +271,18 @@
 <TranslationProvider translations={data.translations}>
   <a
     href="#main-content"
-    class="sr-only focus:not-sr-only focus:fixed focus:top-2 focus:left-2 focus:z-[100] focus:bg-white focus:px-3 focus:py-2 focus:shadow focus:outline focus:outline-2 focus:outline-wald-600 focus:rounded-sm"
+    class="sr-only focus:not-sr-only focus:fixed focus:top-2 focus:left-2 focus:z-[100] focus:bg-white focus:px-3 focus:py-2 focus:shadow focus:outline focus:outline-2 focus:outline-wald-600 focus:rounded-xs"
   >Zum Inhalt springen</a>
-  <div class="flex min-h-screen flex-col text-zinc-900">
+  <div class="flex min-h-screen flex-col text-stein-900">
     {#if pageData?.preview || pageData?.previewDraft}
       <div
-        class="sticky top-0 z-[90] w-full bg-amber-500 text-black shadow-sm"
+        class="sticky top-0 z-[90] w-full bg-erde-500 text-black shadow-sm"
         role="status"
         aria-live="polite"
       >
         <div class="container-custom flex items-center justify-between gap-3 py-1.5 text-sm">
           <span class="font-semibold">
-            {pageData?.previewDraft ? 'Live-Preview — ungespeicherter Draft' : 'Preview-Modus — Draft sichtbar (nicht indexiert)'}
+            {pageData?.previewDraft ? 'Live-Preview · ungespeicherter Draft' : 'Preview-Modus · Draft sichtbar (nicht indexiert)'}
           </span>
           <a
             href={$page.url.pathname}

src/routes/+page.svelte

@@ -26,10 +26,10 @@
       <li>
         <a
           href={'/' + ((p.slug ?? p._slug ?? '').replace(/^\//, '').trim() || '').split('/').filter(Boolean).map(encodeURIComponent).join('/')}
-          class="block rounded-sm border border-zinc-200 bg-white px-4 py-3 shadow-sm transition hover:border-green-700/30 hover:shadow"
+          class="block rounded-xs border border-stein-200 bg-white px-4 py-3 shadow-sm transition hover:border-wald-700/30 hover:shadow"
         >
-          <span class="font-medium text-zinc-900">{p.linkName ?? p.name ?? p.slug ?? p._slug}</span>
-          {#if p.headline}<span class="mt-1 block text-sm text-zinc-500">{p.headline}</span>{/if}
+          <span class="font-medium text-stein-900">{p.linkName ?? p.name ?? p.slug ?? p._slug}</span>
+          {#if p.headline}<span class="mt-1 block text-sm text-stein-500">{p.headline}</span>{/if}
         </a>
       </li>
     {/each}

src/routes/post/[slug]/+page.svelte

@@ -107,7 +107,7 @@
         <h1 class="p-name">{data.post.headline}</h1>
       {/if}
       {#if data.post.subheadline}
-        <p class="text-zinc-600 lead p-summary">{data.post.subheadline}</p>
+        <p class="text-stein-600 lead p-summary">{data.post.subheadline}</p>
       {/if}
     </header>
   {/if}
@@ -172,7 +172,7 @@
       lazy
       class="mt-6"
     >
-      <div class="p-8 border border-zinc-200 rounded-lg">
+      <div class="p-8 border border-stein-200 rounded-lg">
         <Comments pageId={data.commentPageId} />
       </div>
     </Accordion>

src/routes/posts/+page.svelte

@@ -19,7 +19,7 @@
 </div>
 <div class="content mt-8">
   {#if data.cmsError}
-    <div class="rounded-sm border border-amber-200 bg-amber-50 p-4 text-amber-800">
+    <div class="rounded-xs border border-erde-200 bg-erde-50 p-4 text-erde-800">
       <strong>{t(data.translations, T.posts_cms_error)}</strong> {data.cmsError}
     </div>
   {:else}

src/routes/posts/page/[page]/+page.svelte

@@ -19,7 +19,7 @@
 </div>
 <div class="content mt-8">
   {#if data.cmsError}
-    <div class="rounded-sm border border-amber-200 bg-amber-50 p-4 text-amber-800">
+    <div class="rounded-xs border border-erde-200 bg-erde-50 p-4 text-erde-800">
       <strong>{t(data.translations, T.posts_cms_error)}</strong> {data.cmsError}
     </div>
   {:else}

src/routes/posts/tag/[tag]/+page.svelte

@@ -19,7 +19,7 @@
 </div>
 <div class="content mt-8">
   {#if data.cmsError}
-    <div class="rounded-sm border border-amber-200 bg-amber-50 p-4 text-amber-800">
+    <div class="rounded-xs border border-erde-200 bg-erde-50 p-4 text-erde-800">
       <strong>{t(data.translations, T.posts_cms_error)}</strong> {data.cmsError}
     </div>
   {:else}

src/routes/posts/tag/[tag]/page/[page]/+page.svelte

@@ -19,7 +19,7 @@
 </div>
 <div class="content mt-8">
   {#if data.cmsError}
-    <div class="rounded-sm border border-amber-200 bg-amber-50 p-4 text-amber-800">
+    <div class="rounded-xs border border-erde-200 bg-erde-50 p-4 text-erde-800">
       <strong>{t(data.translations, T.posts_cms_error)}</strong> {data.cmsError}
     </div>
   {:else}