diff --git a/wwwroot/css/chat.css b/wwwroot/css/chat.css
index 2f85498..ba8c571 100644
--- a/wwwroot/css/chat.css
+++ b/wwwroot/css/chat.css
@@ -241,7 +241,7 @@
   border-radius: var(--border-radius);
   color: var(--text) !important;
   text-decoration: none !important;
-  font-size: 0.85em;
+  font-size: var(--font-size);
   transition: background var(--transition-speed), border-color var(--transition-speed);
   max-width: 20em;
   overflow: hidden;
@@ -254,7 +254,7 @@
 }
 
 .web-search-source .fa {
-  font-size: 0.75em;
+  font-size: var(--font-size);
   opacity: 0.6;
 }
 
@@ -324,7 +324,7 @@
   padding-top: 0;
   display: flex;
   flex-direction: column;
-  font-size: .85rem;
+  font-size: var(--font-size);
   gap: var(--badge-spacing);
 }
 
@@ -979,6 +979,8 @@
 /* Share Menu */
 
 .share-menu {
+  position: fixed;
+  z-index: 10000;
   background: var(--f2-bg);
   border: var(--border-width) solid var(--f2-border);
   border-radius: var(--border-radius);
diff --git a/wwwroot/css/form.css b/wwwroot/css/form.css
index 667e403..a86e1d3 100644
--- a/wwwroot/css/form.css
+++ b/wwwroot/css/form.css
@@ -855,3 +855,42 @@ a.admin-user-meta {
 .db-back-link:hover {
   color: var(--primary);
 }
+
+/* ── Utility Classes (Inline-Style Replacements) ── */
+
+.clickable { cursor: pointer }
+.semi-dim { opacity: var(--semi-transparent) }
+.text-danger { color: var(--dangerous) }
+.text-accent { color: var(--accent) }
+.text-primary { color: var(--primary) }
+.text-error { color: var(--color-error) }
+.text-secondary { color: var(--text-secondary) }
+.icon-dim { opacity: var(--semi-transparent) }
+.icon-dim-sm { opacity: var(--semi-transparent); font-size: var(--font-size) }
+.chevron-separator { opacity: var(--semi-transparent); font-size: var(--font-size); margin: 0 .3em }
+.pad-v { padding: 1rem 0 }
+.loading-state { opacity: var(--semi-transparent); pointer-events: none }
+.flex-row { display: flex; align-items: center; gap: .5rem }
+.flex-row-tight { display: flex; align-items: center; gap: 8px; margin-top: 2px }
+.min-w-0 { min-width: 0 }
+.ml-auto { margin-left: auto }
+.mr-badge { margin-right: var(--badge-spacing) }
+.ml-sm { margin-left: 8px }
+.mt-xs { margin-top: 4px }
+.font-sm { font-size: var(--font-size) }
+.semi-transparent { opacity: var(--semi-transparent) }
+.lh-relaxed { line-height: 1.7 }
+
+.scan-status { font-size: .85em; color: var(--text-secondary); padding: 0 0 .5rem 0 }
+.check-status-line { padding: 0 var(--box-padding) .5rem; display: none; font-size: .85em }
+.empty-hint { padding: 1rem; text-align: center; opacity: .7 }
+.scanner-toolbar { display: flex; align-items: center; gap: 8px; padding: 8px var(--box-padding); border-bottom: 1px solid var(--border) }
+
+.event-scanner-status { padding: 1em 2em }
+.event-scanner-log { white-space: pre-line }
+
+.remote-hint { font-size: var(--font-size); opacity: var(--semi-transparent); margin-bottom: var(--box-spacing) }
+.remote-card-content { font-size: var(--font-size); display: flex; align-items: center; gap: var(--box-spacing) }
+.remote-card-info { flex: 1; opacity: var(--semi-transparent) }
+.none-card-image { display: flex; align-items: center; justify-content: center }
+.none-card-icon { font-size: 2em; opacity: var(--semi-transparent) }
diff --git a/wwwroot/index.html b/wwwroot/index.html
index 4dc15cd..7efbfd5 100644
--- a/wwwroot/index.html
+++ b/wwwroot/index.html
@@ -473,7 +473,7 @@
             </div>
           </div>
         </section>
-        <section id="settingsBackupSection" class="settings-section" style="display:none">
+        <section id="settingsBackupSection" class="settings-section" hidden>
           <h2>Daten</h2>
           <div class="setting-row">
             <div class="setting-info">
@@ -573,7 +573,7 @@
       <div class="form">
         <div class="section-header">
           <h2>API-Key</h2>
-          <button id="apiKeysCheckAllBtn" class="section-add-btn" style="margin-right: var(--badge-spacing); margin-left: auto;"><i class="fa fa-refresh"></i> Alle prüfen</button>
+          <button id="apiKeysCheckAllBtn" class="section-add-btn mr-badge ml-auto"><i class="fa fa-refresh"></i> Alle prüfen</button>
           <button id="apiKeysNewBtn" class="section-add-btn"><i class="fa fa-plus"></i> Neuer Key</button>
         </div>
         <div id="apiKeysList" class="admin-user-list"></div>
@@ -596,19 +596,19 @@
         </div>
       </div>
 
-      <div id="eventScannerStatus" style="display:none;padding:1em 2em;"></div>
+      <div id="eventScannerStatus" class="event-scanner-status" hidden></div>
 
       <div class="form">
         <div class="section-header">
           <h2>Key Scanner</h2>
-          <div style="display:flex;gap:.5rem;align-items:center">
+          <div class="flex-row">
             <button id="recheckAllScannedBtn" class="section-add-btn"><i class="fa fa-refresh"></i> Alle prüfen</button>
             <button id="scanQuickBtn" class="section-add-btn"><i class="fa fa-bolt"></i> Quick</button>
             <button id="scanWebBtn" class="section-add-btn"><i class="fa fa-globe"></i> Web</button>
             <button id="scanFullBtn" class="section-add-btn"><i class="fa fa-search"></i> Full</button>
           </div>
         </div>
-        <div id="scanStatus" style="font-size:.85em;color:var(--text-secondary);padding:0 0 .5rem 0"></div>
+        <div id="scanStatus" class="scan-status"></div>
         <div id="scannedKeysList" class="admin-user-list"></div>
         <div class="form-actions">
           <button hidden>&nbsp;</button>
diff --git a/wwwroot/js/avatar-editor.js b/wwwroot/js/avatar-editor.js
index bf36ecd..bc979b8 100644
--- a/wwwroot/js/avatar-editor.js
+++ b/wwwroot/js/avatar-editor.js
@@ -55,7 +55,7 @@ var AvatarEditor = (function () {
     renderPreview();
 
     // Click → Modal öffnen
-    previewEl.style.cursor = 'pointer';
+    previewEl.classList.add('clickable');
     previewEl.addEventListener('click', openModal);
 
     // Paste Handler (global, immer aktiv)
@@ -326,7 +326,7 @@ var AvatarEditor = (function () {
           pasteHandler = null;
         }
         previewEl.removeEventListener('click', openModal);
-        previewEl.style.cursor = '';
+        previewEl.classList.remove('clickable');
       }
     };
   }
diff --git a/wwwroot/js/bubbles.js b/wwwroot/js/bubbles.js
index bca44e1..b013160 100644
--- a/wwwroot/js/bubbles.js
+++ b/wwwroot/js/bubbles.js
@@ -72,7 +72,7 @@ function _renderUserTextContent(container, raw, inlineImages) {
     const filePath = ref.replace(/:\d+(-\d+)?$/, '');
     const fileName = filePath.includes('/') ? filePath.substring(filePath.lastIndexOf('/') + 1) : filePath;
     const lineInfo = ref.replace(filePath, '').trim();
-    return '<span class="file-ref-chip" data-filepath="' + esc(filePath) + '" title="' + esc(ref) + '" style="cursor:pointer">'
+    return '<span class="file-ref-chip clickable" data-filepath="' + esc(filePath) + '" title="' + esc(ref) + '">'
       + '<i class="fa fa-file-text-o"></i> ' + esc(fileName + lineInfo) + '</span>';
   });
 
@@ -141,7 +141,7 @@ function createAttachmentIndicator(messageId, count, namesJson) {
   const ind = document.createElement('div');
   ind.className = 'attachment-indicator';
   ind.innerHTML = `<i class="fa fa-paperclip"></i> ${count} Datei${count > 1 ? 'en' : ''}` + (nameList ? `: ${esc(nameList)}` : '');
-  ind.style.cursor = 'pointer';
+  ind.classList.add('clickable');
   ind.title = 'Klicken zum Anzeigen';
   ind.addEventListener('click', () => loadAndShowAttachments(messageId, ind));
   return ind;
diff --git a/wwwroot/js/history.js b/wwwroot/js/history.js
index 5f104eb..46ba72f 100644
--- a/wwwroot/js/history.js
+++ b/wwwroot/js/history.js
@@ -303,7 +303,7 @@ function _renderMessagesIntoFragment(fragment, msgs, imageMessageIds, opts) {
       case 'error': {
         var errDiv = document.createElement('div');
         errDiv.className = 'msg system-info' + (archived ? ' archived' : '');
-        errDiv.style.color = 'var(--dangerous)';
+        errDiv.classList.add('text-danger');
         errDiv.textContent = (msg.content || '').trim();
         fragment.appendChild(errDiv);
         break;
diff --git a/wwwroot/js/modals.js b/wwwroot/js/modals.js
index 3eb531e..e1dc498 100644
--- a/wwwroot/js/modals.js
+++ b/wwwroot/js/modals.js
@@ -72,7 +72,7 @@ async function showSystemPromptModal(sessionId) {
     body.innerHTML = '';
     _renderSystemPromptBlocks(body, blocks);
   } catch (e) {
-    body.innerHTML = '<div class="sp-loading" style="color:var(--dangerous)">Fehler beim Laden des System-Prompts</div>';
+    body.innerHTML = '<div class="sp-loading text-danger">Fehler beim Laden des System-Prompts</div>';
   }
 }
 
@@ -106,7 +106,7 @@ function showKreaImageModal(titleText, fullUrl) {
   img.className = 'krea-modal-image';
   img.alt = titleText;
   img.addEventListener('error', function() {
-    body.innerHTML = '<div class="sp-loading" style="color:var(--dangerous)">Bild konnte nicht geladen werden</div>';
+    body.innerHTML = '<div class="sp-loading text-danger">Bild konnte nicht geladen werden</div>';
   });
 
   body.appendChild(img);
@@ -137,7 +137,7 @@ function _openPickerModal(title, items, currentId, onSelect, options) {
   const noneCard = document.createElement('div');
   noneCard.className = 'card agent-picker-item' + (!currentId ? ' selected' : '');
   noneCard.innerHTML = `
-    <div class="card-image" style="display:flex;align-items:center;justify-content:center"><i class="fa ${esc(noneIcon)}" style="font-size:2em;opacity:var(--semi-transparent)"></i></div>
+    <div class="card-image none-card-image"><i class="fa ${esc(noneIcon)} none-card-icon"></i></div>
     <div class="card-body">
       <div class="card-title-row">
         <span class="card-title">${esc(noneLabel)}</span>
@@ -268,16 +268,14 @@ async function showOpenClawImportModal(sessionId) {
           var confirmed = confirm('OpenClaw-Session importieren?\n\nSession: ' + openclawSession.sessionId.substring(0, 8) + '…\n' + openclawSession.totalMessages + ' Nachrichten\n\nVorhandene Imports werden ersetzt.');
           if (!confirmed) return;
 
-          card.style.opacity = '0.5';
-          card.style.pointerEvents = 'none';
+          card.classList.add('loading-state');
 
           try {
             var result = await apiImportOpenclawSession(openclawSession.sessionId, sessionId);
             close();
             showToast(result.messageCount + ' Nachrichten in ' + result.chainCount + ' Chains importiert', 'success');
           } catch (e) {
-            card.style.opacity = '1';
-            card.style.pointerEvents = '';
+            card.classList.remove('loading-state');
             showToast('Import fehlgeschlagen: ' + e.message, 'error');
           }
         });
@@ -288,7 +286,7 @@ async function showOpenClawImportModal(sessionId) {
 
     body.appendChild(list);
   } catch (e) {
-    body.innerHTML = '<div class="sp-loading" style="color:var(--dangerous)">Fehler: ' + esc(e.message) + '</div>';
+    body.innerHTML = '<div class="sp-loading text-danger">Fehler: ' + esc(e.message) + '</div>';
   }
 }
 
@@ -308,14 +306,14 @@ async function showRemoteModal(sessionId) {
         var empty = document.createElement('div');
         empty.className = 'sp-loading';
         empty.innerHTML = 'Keine Remote-Verbindungen aktiv.<br><br>' +
-          '<span style="font-size:var(--font-size);opacity:var(--semi-transparent)">Auf dem Windows-PC ausführen:<br>' +
+          '<span class="font-sm semi-transparent">Auf dem Windows-PC ausführen:<br>' +
           '<code>irm ' + esc(location.origin) + '/remote | iex</code></span>';
         body.appendChild(empty);
         return;
       }
 
       var hint = document.createElement('div');
-      hint.style.cssText = 'font-size:var(--font-size);opacity:var(--semi-transparent);margin-bottom:var(--box-spacing)';
+      hint.className = 'remote-hint';
       hint.textContent = 'Verbindung auswählen um Remote-Befehle in dieser Session zu ermöglichen:';
       body.appendChild(hint);
 
@@ -323,7 +321,7 @@ async function showRemoteModal(sessionId) {
         var conn = connections[i];
         var card = document.createElement('div');
         card.className = 'sp-block';
-        card.style.cursor = 'pointer';
+        card.classList.add('clickable');
 
         var isAssigned = conn.assignedSessionId === sessionId;
         var isAssignedOther = conn.assignedSessionId && conn.assignedSessionId !== sessionId;
@@ -331,17 +329,17 @@ async function showRemoteModal(sessionId) {
         var label = document.createElement('div');
         label.className = 'sp-block-label';
         var statusIcon = isAssigned ? 'fa-check-circle' : (isAssignedOther ? 'fa-link' : 'fa-desktop');
-        var statusColor = isAssigned ? 'color:var(--primary)' : '';
-        label.innerHTML = '<i class="fa ' + statusIcon + '" style="' + statusColor + '"></i> ' +
+        var statusClass = isAssigned ? ' text-primary' : '';
+        label.innerHTML = '<i class="fa ' + statusIcon + statusClass + '"></i> ' +
           esc(conn.username || '?') + '@' + esc(conn.hostname || '?');
         card.appendChild(label);
 
         var content = document.createElement('div');
         content.className = 'sp-block-content';
-        content.style.cssText = 'font-size:var(--font-size);display:flex;align-items:center;gap:var(--box-spacing)';
+        content.className = 'remote-card-content';
 
         var info = document.createElement('span');
-        info.style.cssText = 'flex:1;opacity:var(--semi-transparent)';
+        info.className = 'remote-card-info';
         var connDate = new Date(conn.connectedAt);
         info.textContent = conn.os + ' • Verbunden seit ' + connDate.toLocaleTimeString('de');
         content.appendChild(info);
@@ -349,14 +347,14 @@ async function showRemoteModal(sessionId) {
         var btn = document.createElement('button');
         if (isAssigned) {
           btn.textContent = 'Trennen';
-          btn.style.cssText = 'color:var(--dangerous)';
+          btn.classList.add('text-danger');
         } else if (isAssignedOther) {
           btn.textContent = 'Andere Session';
           btn.disabled = true;
-          btn.style.cssText = 'opacity:var(--semi-transparent)';
+          btn.classList.add('semi-transparent');
         } else {
           btn.textContent = 'Verbinden';
-          btn.style.cssText = 'color:var(--primary)';
+          btn.classList.add('text-primary');
         }
         content.appendChild(btn);
 
@@ -383,7 +381,7 @@ async function showRemoteModal(sessionId) {
         })(conn, isAssigned);
       }
     } catch (e) {
-      body.innerHTML = '<div class="sp-loading" style="color:var(--dangerous)">Fehler beim Laden: ' + esc(e.message) + '</div>';
+      body.innerHTML = '<div class="sp-loading text-danger">Fehler beim Laden: ' + esc(e.message) + '</div>';
     }
   }
 
diff --git a/wwwroot/js/msg-actions.js b/wwwroot/js/msg-actions.js
index 6ade1d3..4d106bc 100644
--- a/wwwroot/js/msg-actions.js
+++ b/wwwroot/js/msg-actions.js
@@ -140,10 +140,8 @@ function _showShareMenu(anchorBtn) {
 
     // Positionierung
     const rect = anchorBtn.getBoundingClientRect();
-    menu.style.position = 'fixed';
     menu.style.top = (rect.bottom + 4) + 'px';
     menu.style.left = rect.left + 'px';
-    menu.style.zIndex = '10000';
 
     document.body.appendChild(menu);
 
diff --git a/wwwroot/js/pages/api-keys-page.js b/wwwroot/js/pages/api-keys-page.js
index 0fb4f1d..0317ede 100644
--- a/wwwroot/js/pages/api-keys-page.js
+++ b/wwwroot/js/pages/api-keys-page.js
@@ -76,8 +76,7 @@ registerPage('api-keys', {
 
       if (keys.length === 0) {
         var empty = document.createElement('div');
-        empty.className = 'admin-user-meta';
-        empty.style.padding = '1rem 0';
+        empty.className = 'admin-user-meta pad-v';
         empty.textContent = 'Keine API-Keys konfiguriert.';
         list.appendChild(empty);
         return;
@@ -118,13 +117,13 @@ registerPage('api-keys', {
 
         // Toggle + Usage-Badge nebeneinander
         var badgeRow = document.createElement('div');
-        badgeRow.style.cssText = 'display:flex;align-items:center;gap:8px;margin-top:2px';
+        badgeRow.className = 'flex-row-tight';
 
         var publicBtn = document.createElement('button');
         publicBtn.className = 'icon-btn';
         publicBtn.title = key.isPublic ? 'Öffentlich (klicken zum Privatschalten)' : 'Privat (klicken zum Veröffentlichen)';
         publicBtn.innerHTML = key.isPublic
-          ? '<i class="fa fa-globe" style="color:var(--accent)"></i>'
+          ? '<i class="fa fa-globe text-accent"></i>'
           : '<i class="fa fa-lock"></i>';
         publicBtn.addEventListener('click', function() { togglePublic(key); });
         badgeRow.appendChild(publicBtn);
@@ -135,7 +134,7 @@ registerPage('api-keys', {
         // Status-Zeile (für Check-Ergebnis)
         var statusLine = document.createElement('div');
         statusLine.className = 'admin-user-meta';
-        statusLine.style.cssText = 'padding:0 var(--box-padding) .5rem;display:none;font-size:.85em';
+        statusLine.className = 'admin-user-meta check-status-line';
 
         // Check – rechts neben Usage-Badge
         if (key.provider === 'anthropic' || key.provider === 'openai' || key.provider === 'google') {
@@ -202,7 +201,7 @@ registerPage('api-keys', {
           text.textContent = parts.join(' · ');
           statusLine.appendChild(text);
           var badge = createUsageBadge(result.usage5h, result.usage7d);
-          if (badge) { badge.style.marginTop = '4px'; statusLine.appendChild(badge); }
+          if (badge) { badge.classList.add('mt-xs'); statusLine.appendChild(badge); }
         } else {
           statusLine.textContent = '❌ ' + (result.message || 'Unbekannter Fehler');
         }
@@ -350,7 +349,7 @@ registerPage('api-keys', {
       if (!summary || summary.length === 0) {
         var empty = document.createElement('div');
         empty.className = 'admin-user-meta';
-        empty.style.padding = '1rem 0';
+        empty.className = 'admin-user-meta pad-v';
         empty.textContent = 'Keine gescannten Keys vorhanden.';
         scannedList.appendChild(empty);
         return;
@@ -358,8 +357,7 @@ registerPage('api-keys', {
 
       summary.forEach(function(s) {
         var row = document.createElement('div');
-        row.className = 'admin-user-row';
-        row.style.cursor = 'pointer';
+        row.className = 'admin-user-row clickable';
 
         var info = document.createElement('div');
         info.className = 'admin-user-info';
@@ -382,7 +380,7 @@ registerPage('api-keys', {
 
         var badge = document.createElement('div');
         badge.className = 'admin-user-actions';
-        badge.innerHTML = '<i class="fa fa-chevron-right" style="opacity:.5"></i>';
+        badge.innerHTML = '<i class="fa fa-chevron-right icon-dim"></i>';
 
         row.appendChild(info);
         row.appendChild(badge);
@@ -397,8 +395,7 @@ registerPage('api-keys', {
       // Zurück-Button
       var backRow = document.createElement('div');
       backRow.className = 'admin-user-row';
-      backRow.style.cursor = 'pointer';
-      backRow.style.opacity = '.7';
+      backRow.classList.add('clickable', 'semi-dim');
       var backInfo = document.createElement('div');
       backInfo.className = 'admin-user-info';
       var backName = document.createElement('span');
@@ -414,7 +411,7 @@ registerPage('api-keys', {
       var uncheckedKeys = visibleKeys.filter(function(sk) { return sk.status === 'unchecked'; });
       if (uncheckedKeys.length > 0) {
         var toolbar = document.createElement('div');
-        toolbar.style.cssText = 'display:flex;align-items:center;gap:8px;padding:8px var(--box-padding);border-bottom:1px solid var(--border)';
+        toolbar.className = 'scanner-toolbar';
 
         var checkUncheckedBtn = document.createElement('button');
         checkUncheckedBtn.className = 'section-add-btn';
@@ -422,7 +419,7 @@ registerPage('api-keys', {
 
         var progressSpan = document.createElement('span');
         progressSpan.className = 'admin-user-meta';
-        progressSpan.style.marginLeft = '8px';
+        progressSpan.classList.add('ml-sm');
 
         toolbar.appendChild(checkUncheckedBtn);
         toolbar.appendChild(progressSpan);
@@ -435,7 +432,7 @@ registerPage('api-keys', {
           var stopBtn = document.createElement('button');
           stopBtn.className = 'icon-btn';
           stopBtn.title = 'Abbrechen';
-          stopBtn.innerHTML = '<i class="fa fa-stop" style="color:var(--danger)"></i>';
+          stopBtn.innerHTML = '<i class="fa fa-stop text-danger"></i>';
           stopBtn.addEventListener('click', function() { checkUncheckedAbort = true; });
           toolbar.appendChild(stopBtn);
 
@@ -474,7 +471,7 @@ registerPage('api-keys', {
       if (visibleKeys.length === 0) {
         var empty = document.createElement('div');
         empty.className = 'admin-user-meta';
-        empty.style.padding = '1rem 0';
+        empty.className = 'admin-user-meta pad-v';
         empty.textContent = 'Keine nicht-übernommenen Keys in dieser Kategorie.';
         scannedList.appendChild(empty);
         return;
@@ -487,7 +484,7 @@ registerPage('api-keys', {
 
         var info = document.createElement('div');
         info.className = 'admin-user-info';
-        info.style.minWidth = '0';
+        info.classList.add('min-w-0');
 
         if (sk.sourceUrl) {
           var nameSpan = document.createElement('a');
@@ -540,7 +537,7 @@ registerPage('api-keys', {
           var adoptBtn = document.createElement('button');
           adoptBtn.className = 'icon-btn';
           adoptBtn.title = 'Als API-Key übernehmen';
-          adoptBtn.innerHTML = '<i class="fa fa-plus-circle" style="color:var(--accent)"></i>';
+          adoptBtn.innerHTML = '<i class="fa fa-plus-circle text-accent"></i>';
           adoptBtn.addEventListener('click', async function(e) {
             e.stopPropagation();
             try {
@@ -582,7 +579,7 @@ registerPage('api-keys', {
 
     async function loadScannedKeysByType(type) {
       selectedType = type;
-      scannedList.innerHTML = '<div class="admin-user-meta" style="padding:1rem 0"><i class="fa fa-spinner fa-spin"></i> Lade Keys…</div>';
+      scannedList.innerHTML = '<div class="admin-user-meta pad-v"><i class="fa fa-spinner fa-spin"></i> Lade Keys…</div>';
       try {
         scannedKeys = await apiGetScannedKeys(type);
         renderScannedKeys();
@@ -619,8 +616,8 @@ registerPage('api-keys', {
       if (!el) return;
       try {
         var s = await apiEventScannerStatus();
-        if (!s.enabled) { el.style.display = 'none'; return; }
-        el.style.display = 'block';
+        if (!s.enabled) { el.hidden = true; return; }
+        el.hidden = false;
 
         // Status-Zeile
         var parts = ['🔴 Event Scanner'];
@@ -651,26 +648,27 @@ registerPage('api-keys', {
         // Immer klickbare Status-Zeile rendern
         var wasOpen = false;
         var oldLog = document.getElementById('eventScannerLog');
-        if (oldLog) wasOpen = oldLog.style.display !== 'none';
+        if (oldLog) wasOpen = !oldLog.hidden;
 
         el.innerHTML = '';
         var statusEl = document.createElement('div');
-        statusEl.style.cssText = 'cursor:pointer';
+        statusEl.className = 'clickable';
         statusEl.title = logLines.length > 0 ? 'Klicken für Log' : '';
         statusEl.textContent = statusLine;
         el.appendChild(statusEl);
 
         var logEl = document.createElement('div');
         logEl.id = 'eventScannerLog';
-        logEl.style.cssText = 'white-space:pre-line;display:none';
+        logEl.className = 'event-scanner-log';
+        logEl.hidden = true;
         logEl.textContent = logLines.length > 0 ? logLines.join('\n') : 'Noch keine Log-Einträge…';
-        if (wasOpen) logEl.style.display = 'block';
+        if (wasOpen) logEl.hidden = false;
         el.appendChild(logEl);
 
         statusEl.addEventListener('click', function() {
-          logEl.style.display = logEl.style.display === 'none' ? 'block' : 'none';
+          logEl.hidden = !logEl.hidden;
         });
-      } catch(e) { el.style.display = 'none'; }
+      } catch(e) { el.hidden = true; }
     }
 
     function formatScanProgress(s) {
diff --git a/wwwroot/js/pages/chat-page.js b/wwwroot/js/pages/chat-page.js
index ed68aff..08dacf5 100644
--- a/wwwroot/js/pages/chat-page.js
+++ b/wwwroot/js/pages/chat-page.js
@@ -104,7 +104,7 @@ function _renderChatUsageBadge(container, key) {
     _showKeySwitchModal();
   });
   badge.title = (key.name || 'API Key') + ' · ' + (key.plan || '?');
-  badge.style.cursor = 'pointer';
+  badge.classList.add('clickable');
   container.appendChild(badge);
 
   // Check-Button nur für Admins
@@ -143,7 +143,7 @@ async function _showKeySwitchModal() {
 
   if (keys.length === 0) {
     var empty = document.createElement('div');
-    empty.style.cssText = 'padding:1rem;text-align:center;opacity:0.7';
+    empty.className = 'empty-hint';
     empty.textContent = 'Keine Keys verfügbar. Ein Admin muss Keys als öffentlich markieren.';
     body.appendChild(empty);
     return;
@@ -183,18 +183,16 @@ async function _showKeySwitchModal() {
     }
 
     if (key.keyId !== selectedKeyId) {
-      row.style.cursor = 'pointer';
+      row.classList.add('clickable');
       row.addEventListener('click', async function() {
-        row.style.opacity = '0.5';
-        row.style.pointerEvents = 'none';
+        row.classList.add('loading-state');
         try {
           await apiSelectApiKey(key.keyId);
           close();
           await _initChatUsageBadge();
         } catch(e) {
           console.error('Key switch failed:', e);
-          row.style.opacity = '';
-          row.style.pointerEvents = '';
+          row.classList.remove('loading-state');
         }
       });
     }
diff --git a/wwwroot/js/pages/cronjob-page.js b/wwwroot/js/pages/cronjob-page.js
index 2667c52..ee67ae2 100644
--- a/wwwroot/js/pages/cronjob-page.js
+++ b/wwwroot/js/pages/cronjob-page.js
@@ -160,10 +160,10 @@ function updateCronPreview(input, preview) {
   const desc = describeCron(expr);
   if (desc) {
     preview.textContent = desc;
-    preview.style.color = '';
+    preview.classList.remove('text-error');
   } else {
     preview.textContent = 'Ungültige Cron-Expression';
-    preview.style.color = 'var(--color-error)';
+    preview.classList.add('text-error');
   }
 }
 
diff --git a/wwwroot/js/pages/db-explorer-page.js b/wwwroot/js/pages/db-explorer-page.js
index 73e489d..b334fca 100644
--- a/wwwroot/js/pages/db-explorer-page.js
+++ b/wwwroot/js/pages/db-explorer-page.js
@@ -66,10 +66,10 @@ registerPage('db-explorer', {
 
     async function loadTableData(name, page) {
       currentTable = name;
-      titleEl.innerHTML = '<span class="db-back-link">Datenbank-Explorer</span> <i class="fa fa-chevron-right" style="opacity:.4;font-size:.7em;margin:0 .3em"></i> ' + esc(name);
+      titleEl.innerHTML = '<span class="db-back-link">Datenbank-Explorer</span> <i class="fa fa-chevron-right chevron-separator"></i> ' + esc(name);
 
       // Back-Link klickbar
-      titleEl.querySelector('.db-back-link').style.cursor = 'pointer';
+      titleEl.querySelector('.db-back-link').classList.add('clickable');
       titleEl.querySelector('.db-back-link').addEventListener('click', function() {
         loadTables();
       });
@@ -129,7 +129,7 @@ registerPage('db-explorer', {
         data.columns.forEach(function(col) {
           var th = document.createElement('th');
           th.textContent = col.name;
-          if (col.pk) th.innerHTML += ' <i class="fa fa-key" style="opacity:.4;font-size:.75em"></i>';
+          if (col.pk) th.innerHTML += ' <i class="fa fa-key icon-dim-sm"></i>';
           th.title = col.type + (col.notnull ? ' NOT NULL' : '') + (col.pk ? ' PRIMARY KEY' : '');
           headerRow.appendChild(th);
         });
diff --git a/wwwroot/js/pages/settings-page.js b/wwwroot/js/pages/settings-page.js
index c0a459f..e3a4f73 100644
--- a/wwwroot/js/pages/settings-page.js
+++ b/wwwroot/js/pages/settings-page.js
@@ -12,7 +12,7 @@ registerPage('settings', {
 
     // Backup nur für Admins
     if (currentUser && currentUser.isAdmin) {
-      backupSection.style.display = '';
+      backupSection.hidden = false;
     }
 
     const s = loadSettings();
diff --git a/wwwroot/js/title.js b/wwwroot/js/title.js
index 379879c..e0bbcae 100644
--- a/wwwroot/js/title.js
+++ b/wwwroot/js/title.js
@@ -11,7 +11,7 @@ fetch('/api/info').then(r => r.json()).then(data => {
 
 function _showEmbeddingWarning() {
   const { body } = _createModal('⚠️ Embedding-Modell nicht gefunden');
-  body.style.lineHeight = '1.7';
+  body.classList.add('lh-relaxed');
   body.innerHTML =
     '<p>Das Embedding-Modell <strong>all-MiniLM-L6-v2</strong> wurde nicht gefunden. ' +
     'Ohne dieses Modell ist die semantische Suche (<code>memory_search</code>) deaktiviert.</p>' +
diff --git a/wwwroot/js/tool-ui.js b/wwwroot/js/tool-ui.js
index 137feba..6099a46 100644
--- a/wwwroot/js/tool-ui.js
+++ b/wwwroot/js/tool-ui.js
@@ -156,7 +156,7 @@ function renderToolBoxContent(div, name, inputJson, result, isError, sources) {
   }
 
   if (foldTarget && name !== 'todo_write') {
-    header.style.cursor = 'pointer';
+    header.classList.add('clickable');
     header.addEventListener('click', () => {
       foldTarget.hidden = !foldTarget.hidden;
     });