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/lib/components/Search.svelte

@@ -89,7 +89,7 @@
     <div class="container-custom py-4 overflow-auto max-h-[calc(100vh-120px)]">
       <label class="relative block max-w-xl mx-auto">
         <span class="sr-only">Suche</span>
-        <span class="pointer-events-none absolute top-1/2 left-3 -translate-y-1/2 text-zinc-500">
+        <span class="pointer-events-none absolute top-1/2 left-3 -translate-y-1/2 text-stein-500">
           <Icon icon="mdi:magnify" class="h-5 w-5" />
         </span>
         <input
@@ -97,14 +97,14 @@
           type="search"
           bind:value={query}
           placeholder="Seiten und Beiträge durchsuchen…"
-          class="w-full rounded-sm border border-zinc-300 bg-white py-3 pl-10 pr-10 text-sm focus:border-zinc-500 focus:outline-none"
+          class="w-full rounded-xs border border-stein-300 bg-white py-3 pl-10 pr-10 text-sm focus:border-stein-500 focus:outline-none"
         />
         {#if query}
           <button
             type="button"
             onclick={() => (query = "")}
             aria-label="Eingabe leeren"
-            class="absolute top-1/2 right-2 -translate-y-1/2 rounded-sm p-1 text-zinc-500 hover:bg-zinc-100 hover:text-zinc-900"
+            class="absolute top-1/2 right-2 -translate-y-1/2 rounded-xs p-1 text-stein-500 hover:bg-stein-100 hover:text-stein-900"
           >
             <Icon icon="mdi:close" class="h-4 w-4" />
           </button>
@@ -113,36 +113,36 @@
 
       <div class="max-w-xl mx-auto mt-4 text-sm">
         {#if loading}
-          <p class="text-zinc-500 text-center py-2">Lade Suchindex…</p>
+          <p class="text-stein-500 text-center py-2">Lade Suchindex…</p>
         {:else if loadError}
-          <p class="text-red-600 text-center py-2">Suche nicht verfügbar: {loadError}</p>
+          <p class="text-fire-600 text-center py-2">Suche nicht verfügbar: {loadError}</p>
         {:else if normalizedQuery.length < 2}
-          <p class="text-zinc-500 text-center py-2">Mindestens 2 Zeichen eingeben.</p>
+          <p class="text-stein-500 text-center py-2">Mindestens 2 Zeichen eingeben.</p>
         {:else if results.length === 0}
-          <p class="text-zinc-500 text-center py-2">Keine Treffer.</p>
+          <p class="text-stein-500 text-center py-2">Keine Treffer.</p>
         {:else}
-          <ul class="divide-y divide-zinc-200">
+          <ul class="divide-y divide-stein-200">
             {#each results as hit}
               <li>
                 <a
                   href={hit.href}
                   onclick={closeSearch}
-                  class="flex items-start gap-3 py-3 hover:bg-zinc-50 rounded-sm px-2 -mx-2 no-underline"
+                  class="flex items-start gap-3 py-3 hover:bg-stein-50 rounded-xs px-2 -mx-2 no-underline"
                 >
                   {#if hit.image}
                     <img
                       src={hit.image}
                       alt=""
-                      class="w-20 h-12 object-cover shrink-0 rounded-sm border border-zinc-200"
+                      class="w-20 h-12 object-cover shrink-0 rounded-xs border border-stein-200"
                       loading="lazy"
                     />
                   {:else}
-                    <span class="w-20 h-12 shrink-0 bg-zinc-100 rounded-sm border border-zinc-200 flex items-center justify-center text-zinc-400">
+                    <span class="w-20 h-12 shrink-0 bg-stein-100 rounded-xs border border-stein-200 flex items-center justify-center text-stein-400">
                       <Icon icon={hit.type === "post" ? "mdi:file-document-outline" : "mdi:file-outline"} class="h-5 w-5" />
                     </span>
                   {/if}
                   <div class="min-w-0 flex-1">
-                    <div class="flex items-center gap-2 text-[.65rem] uppercase tracking-wide text-zinc-500">
+                    <div class="flex items-center gap-2 text-[.65rem] uppercase tracking-wide text-stein-500">
                       <span>{hit.type === "post" ? "Beitrag" : "Seite"}</span>
                       {#if hit.isEvent && hit.eventDate}
                         <span class="text-wald-700">{formatDate(hit.eventDate)}</span>
@@ -150,9 +150,9 @@
                         <span>{formatDate(hit.created)}</span>
                       {/if}
                     </div>
-                    <div class="font-medium text-zinc-900 truncate">{hit.title}</div>
+                    <div class="font-medium text-stein-900 truncate">{hit.title}</div>
                     {#if hit.excerpt}
-                      <div class="text-xs text-zinc-600 line-clamp-2">{hit.excerpt}</div>
+                      <div class="text-xs text-stein-600 line-clamp-2">{hit.excerpt}</div>
                     {/if}
                   </div>
                 </a>