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/blocks/OrganisationsBlock.svelte

@@ -64,7 +64,7 @@
 
 {#snippet defaultCard(o: OrganisationEntry, linkUrl: string | undefined, logoField: ReturnType<typeof organisationLogoField>, orgIndex: number)}
   <Card href={linkUrl} class="h-full">
-    <div class="flex h-11 w-11 shrink-0 items-center justify-center overflow-hidden bg-gray-100">
+    <div class="flex h-11 w-11 shrink-0 items-center justify-center overflow-hidden bg-stein-100">
       {#if logoField}
         <RustyImage
           src={logoField.url}
@@ -79,7 +79,7 @@
         />
       {:else}
         {@const fishMaskId = `org-logo-fallback-mask-${orgIndex}`}
-        <svg class="h-8 w-8 text-gray-300" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" fill="currentColor" aria-hidden="true">
+        <svg class="h-8 w-8 text-stein-300" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" fill="currentColor" aria-hidden="true">
           <defs>
             <mask id={fishMaskId}>
               <g fill="none">
@@ -98,9 +98,9 @@
         <Badge color={o.badge.color}>{o.badge.label}</Badge>
       </div>
     {/if}
-    <h5 class="mb-1 min-w-0 truncate text-sm font-medium leading-tight text-slate-950">{o.name ?? ""}</h5>
+    <h5 class="mb-1 min-w-0 truncate text-sm font-medium leading-tight text-stein-900">{o.name ?? ""}</h5>
     {#if o.description}
-      <p class="line-clamp-2 text-xs font-light text-slate-600">{o.description}</p>
+      <p class="line-clamp-2 text-xs font-light text-stein-600">{o.description}</p>
     {/if}
   </Card>
 {/snippet}
@@ -204,7 +204,7 @@
           {@const logoField = organisationLogoField(o)}
           {#if compact}
             <Card href={linkUrl} layout="inline" class="h-full">
-              <div class="flex h-10 w-10 shrink-0 items-center justify-center overflow-hidden bg-gray-100">
+              <div class="flex h-10 w-10 shrink-0 items-center justify-center overflow-hidden bg-stein-100">
                 {#if logoField}
                   <RustyImage
                     src={logoField.url}
@@ -219,7 +219,7 @@
                   />
                 {:else}
                   {@const fishMaskId = `org-logo-fallback-mask-c-${orgIndex}`}
-                  <svg class="h-7 w-7 text-gray-300" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" fill="currentColor" aria-hidden="true">
+                  <svg class="h-7 w-7 text-stein-300" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" fill="currentColor" aria-hidden="true">
                     <defs>
                       <mask id={fishMaskId}>
                         <g fill="none">
@@ -234,9 +234,9 @@
                 {/if}
               </div>
               <div class="flex min-w-0 flex-1 flex-col gap-0.5">
-                <h5 class="text-sm font-medium leading-tight text-slate-950">{o.name ?? ""}</h5>
+                <h5 class="text-sm font-medium leading-tight text-stein-900">{o.name ?? ""}</h5>
                 {#if o.description}
-                  <p class="line-clamp-2 text-xs font-light text-slate-600">{o.description}</p>
+                  <p class="line-clamp-2 text-xs font-light text-stein-600">{o.description}</p>
                 {/if}
               </div>
             </Card>