Apply Do Better Norge tools brand redesign (CSS + all tool pages)

New dbn-tools-redesign.css with warm paper surface, navy tools nav, gold
accent, and per-tool themes via body[data-active-tool]. Updated all 21 tool
PHP pages, shared layout/nav/footer includes, and advocate route (new).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

includes/nav.php

@@ -14,11 +14,20 @@ $_navTools   = dbnToolsLaunchedTools($_navLang);
 $_navPath    = strtok((string)($_SERVER['REQUEST_URI'] ?? '/'), '?') ?: '/';
 $_navOnDash  = str_starts_with($_navPath, '/dashboard');
 $_navReturnUrl = urlencode($_navPath);
+$_navScriptPath = str_replace('\\', '/', (string)($_SERVER['SCRIPT_NAME'] ?? ''));
+$_navAssetBase = str_contains($_navScriptPath, '/dashboard/') ? '../assets' : 'assets';
 ?>
 <nav class="dbn-nav" role="navigation" aria-label="<?= htmlspecialchars(dbnToolsT('suite_title', $_navLang)) ?>">
     <a class="dbn-nav__brand" href="/dashboard.php">
+        <picture>
+            <source srcset="<?= htmlspecialchars($_navAssetBase) ?>/images/logo-header.webp" type="image/webp">
+            <img class="dbn-nav__brand-logo" src="<?= htmlspecialchars($_navAssetBase) ?>/images/logo-header.png" alt="Do Better Norge" width="140" height="36" loading="eager">
+        </picture>
         <span class="dbn-nav__brandmark" aria-hidden="true">⚖</span>
-        <span class="dbn-nav__brandname">Do Better Norge</span>
+        <span class="dbn-nav__brand-text">
+            <span class="dbn-nav__brandname">Do Better Norge</span>
+            <span class="dbn-nav__product">Legal Tools</span>
+        </span>
     </a>
 
     <div class="dbn-nav__links" role="menubar">