diff --git a/CHANGELOG.md b/CHANGELOG.md
index 74666f9..195922d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,13 @@ Das Format folgt [Keep a Changelog](https://keepachangelog.com/de/1.1.0/), die V
 
 ## [Unreleased]
 
+### Added
+- Formatierungs-Kürzel im Outliner: `Strg+B` / `Cmd+B` für fett, `Strg+I` / `Cmd+I` für kursiv (mit Ein-/Ausschalten bei markiertem Text) und `Strg+K` / `Cmd+K` für Links (mit Markierung `[Text](…)` mit vorselektierter Adresse, ohne Markierung Link-Dialog).
+- Code-Blöcke: Zeilennummernspalte links mit synchronem Scrollen (wächst dynamisch bei 100+ Zeilen, zählt auch leere Endzeilen mit); horizontaler Bildlauf bei langen Zeilen ohne automatischen Zeilenumbruch (`white-space: pre`).
+
+### Fixed
+- Light-Theme: Kontraste für Code-Blöcke (`--bg-code`), Callouts (`--bg-panel-elevated`), Zitate und Rahmen auf Notizhintergründen geschärft; VS Code Light+ Syntaxfarben für hohe Lesbarkeit optimiert.
+
 ## [0.8.0] - 2026-10-30
 
 ### Added
diff --git a/README.md b/README.md
index ad68179..5d10d77 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,7 @@ Die meisten Notiz- und Aufgaben-Apps verlangen Struktur im falschen Moment: Wenn
 * **Aufgabenlisten teilen** mit Benutzern oder Gruppen, wahlweise als **Bearbeiter** oder **nur lesend**.
 * **Aufgaben beobachten:** Beliebige Aufgaben per Klick abonnieren, um über alle Änderungen informiert zu werden.
 * **Wiederholungen:** Wiederkehrende Aufgaben (täglich, wöchentlich, monatlich, jährlich) mit automatischer Folgeaufgabe beim Abhaken.
+* **Tageszusammenfassung:** Tägliche Übersicht fälliger Aufgaben zur selbst gewählten Uhrzeit per E-Mail/Discord.
 * **Alarme & Benachrichtigungen:** Fälligkeits-Alarme sofort per E-Mail, Discord oder eigenem Webhook; granulare Benachrichtigungen für Freigaben, erledigte geteilte Aufgaben und beobachtete Aufgaben sowie tägliche Zusammenfassungen zur gewählten Uhrzeit.
 
 <p align="center">
diff --git a/frontend/src/features/workspace/CodeBlockEditor.tsx b/frontend/src/features/workspace/CodeBlockEditor.tsx
index 8f314b7..c4e436b 100644
--- a/frontend/src/features/workspace/CodeBlockEditor.tsx
+++ b/frontend/src/features/workspace/CodeBlockEditor.tsx
@@ -347,6 +347,7 @@ export const CodeBlockEditor: React.FC<CodeBlockEditorProps> = ({
   const copyTimerRef = useRef<number | null>(null);
   const localTextareaRef = useRef<HTMLTextAreaElement | null>(null);
   const preRef = useRef<HTMLPreElement | null>(null);
+  const lineNumbersRef = useRef<HTMLDivElement | null>(null);
 
   useEffect(() => {
     return () => {
@@ -506,18 +507,42 @@ export const CodeBlockEditor: React.FC<CodeBlockEditorProps> = ({
   };
 
   const handleScroll = (e: React.UIEvent<HTMLTextAreaElement>) => {
+    const target = e.currentTarget;
     if (preRef.current) {
-      preRef.current.scrollTop = e.currentTarget.scrollTop;
-      preRef.current.scrollLeft = e.currentTarget.scrollLeft;
+      preRef.current.scrollTop = target.scrollTop;
+      preRef.current.scrollLeft = target.scrollLeft;
+    }
+    if (lineNumbersRef.current) {
+      lineNumbersRef.current.scrollTop = target.scrollTop;
     }
   };
 
+  const handleLineNumbersScroll = (e: React.UIEvent<HTMLDivElement>) => {
+    const target = e.currentTarget;
+    if (localTextareaRef.current) {
+      localTextareaRef.current.scrollTop = target.scrollTop;
+    }
+    if (preRef.current) {
+      preRef.current.scrollTop = target.scrollTop;
+    }
+  };
+
+  const handleLineNumbersWheel = (e: React.WheelEvent) => {
+    if (localTextareaRef.current) {
+      localTextareaRef.current.scrollTop += e.deltaY;
+    }
+  };
+
+  const lineCount = useMemo(() => {
+    return currentContent.split('\n').length;
+  }, [currentContent]);
+
   const rawLang = block.lang || '';
   const selectValue = rawLang ? resolveLanguageId(rawLang) || rawLang : '';
   const hasCustomUnknownLang = Boolean(selectValue && !KNOWN_OPTION_IDS.has(selectValue));
 
   return (
-    <div className="bg-code border border-border rounded-btn my-0.5 overflow-x-auto max-w-full">
+    <div className="bg-code border border-border rounded-btn my-0.5 max-w-full overflow-hidden">
       {/* Code Block Header */}
       <div className="flex items-center justify-between gap-2 px-2 py-1 border-b border-border text-[11px] font-mono text-faint">
         <div className="flex items-center gap-1.5 min-w-0">
@@ -584,41 +609,60 @@ export const CodeBlockEditor: React.FC<CodeBlockEditorProps> = ({
         </div>
       </div>
 
-      {/* Live Highlighted Overlay + Textarea */}
-      <div className="relative w-full overflow-x-auto">
-        <pre
-          ref={preRef}
+      {/* Live Highlighted Overlay + Textarea with Line Numbers */}
+      <div className="flex relative w-full overflow-hidden">
+        {/* Line Numbers Column */}
+        <div
+          ref={lineNumbersRef}
           aria-hidden="true"
-          className="absolute inset-0 m-0 p-2 font-mono text-xs text-main leading-relaxed whitespace-pre-wrap break-words [overflow-wrap:anywhere] pointer-events-none select-none overflow-hidden"
+          onScroll={handleLineNumbersScroll}
+          onWheel={handleLineNumbersWheel}
+          data-testid="code-line-numbers"
+          className="select-none py-2 pl-2.5 pr-2 font-mono text-xs text-faint leading-relaxed text-right border-r border-border/40 shrink-0 overflow-hidden"
         >
-          <code
-            className={prismLang ? `language-${prismLang}` : 'language-none'}
-            dangerouslySetInnerHTML={{
-              __html: highlightedHtml + (currentContent.endsWith('\n') ? '\n' : ''),
+          {Array.from({ length: lineCount }, (_, i) => (
+            <div key={i + 1} data-line-number={i + 1}>
+              {i + 1}
+            </div>
+          ))}
+        </div>
+
+        {/* Code Content (Overlay + Textarea) */}
+        <div className="relative flex-1 min-w-0 overflow-hidden">
+          <pre
+            ref={preRef}
+            aria-hidden="true"
+            className="absolute inset-0 m-0 p-2 font-mono text-xs text-main leading-relaxed whitespace-pre pointer-events-none select-none overflow-hidden"
+          >
+            <code
+              className={prismLang ? `language-${prismLang}` : 'language-none'}
+              dangerouslySetInnerHTML={{
+                __html: highlightedHtml + (currentContent.endsWith('\n') ? '\n' : ''),
+              }}
+            />
+          </pre>
+          <textarea
+            ref={(el) => {
+              localTextareaRef.current = el;
+              if (textareaRef) textareaRef.current = el;
+              registerTextareaRef?.(block.id, el);
             }}
+            rows={1}
+            value={currentContent}
+            readOnly={!canEdit}
+            spellCheck={false}
+            autoCapitalize="off"
+            autoComplete="off"
+            autoCorrect="off"
+            onFocus={handleFocus}
+            onBlur={handleBlur}
+            onChange={onTextareaChange}
+            onKeyDown={onTextareaKeyDown}
+            onScroll={handleScroll}
+            style={{ caretColor: 'var(--text-main)' }}
+            className="relative block w-full m-0 p-2 font-mono text-xs leading-relaxed whitespace-pre bg-transparent text-transparent caret-main selection:bg-accent/25 selection:text-transparent border-0 focus:outline-none focus:ring-0 resize-none overflow-x-auto"
           />
-        </pre>
-        <textarea
-          ref={(el) => {
-            localTextareaRef.current = el;
-            if (textareaRef) textareaRef.current = el;
-            registerTextareaRef?.(block.id, el);
-          }}
-          rows={1}
-          value={currentContent}
-          readOnly={!canEdit}
-          spellCheck={false}
-          autoCapitalize="off"
-          autoComplete="off"
-          autoCorrect="off"
-          onFocus={handleFocus}
-          onBlur={handleBlur}
-          onChange={onTextareaChange}
-          onKeyDown={onTextareaKeyDown}
-          onScroll={handleScroll}
-          style={{ caretColor: 'var(--text-main)' }}
-          className="relative block w-full m-0 p-2 font-mono text-xs leading-relaxed whitespace-pre-wrap break-words [overflow-wrap:anywhere] bg-transparent text-transparent caret-main selection:bg-accent/25 selection:text-transparent border-0 focus:outline-none focus:ring-0 resize-none overflow-hidden"
-        />
+        </div>
       </div>
     </div>
   );
diff --git a/frontend/src/features/workspace/OutlinerBlock.tsx b/frontend/src/features/workspace/OutlinerBlock.tsx
index 03734fc..21e2f19 100644
--- a/frontend/src/features/workspace/OutlinerBlock.tsx
+++ b/frontend/src/features/workspace/OutlinerBlock.tsx
@@ -440,6 +440,33 @@ export const OutlinerBlock: React.FC<OutlinerBlockProps> = ({
     flushDebounce(newContent);
   };
 
+  const applyFormattingChange = (newVal: string, selStart: number, selEnd: number) => {
+    setLocalContent(newVal);
+    localContentRef.current = newVal;
+    if (debounceTimerRef.current !== null) {
+      window.clearTimeout(debounceTimerRef.current);
+    }
+    debounceTimerRef.current = window.setTimeout(() => {
+      debounceTimerRef.current = null;
+      onUpdateBlockRef.current({
+        ...latestBlockRef.current,
+        content: newVal,
+      });
+    }, 150);
+
+    const ta = textareaRef.current;
+    if (ta) {
+      ta.value = newVal;
+      ta.setSelectionRange(selStart, selEnd);
+    }
+    setTimeout(() => {
+      if (textareaRef.current) {
+        textareaRef.current.setSelectionRange(selStart, selEnd);
+        adjustHeight();
+      }
+    }, 0);
+  };
+
   const handleContentChange = (e: React.ChangeEvent<HTMLTextAreaElement>) => {
     if (!canEdit) return;
     let val = e.target.value;
@@ -616,6 +643,108 @@ export const OutlinerBlock: React.FC<OutlinerBlockProps> = ({
     }
     if (!canEdit) return;
 
+    // Formatting shortcuts (Ctrl/Cmd+B, Ctrl/Cmd+I, Ctrl/Cmd+K) - not in code blocks
+    const isMod = (e.ctrlKey || e.metaKey) && !e.altKey;
+    if (isMod && block.type !== 'code' && ['b', 'i', 'k'].includes(e.key.toLowerCase())) {
+      e.preventDefault();
+      e.stopPropagation();
+
+      const ta = textareaRef.current || e.currentTarget;
+      const start = ta.selectionStart ?? 0;
+      const end = ta.selectionEnd ?? 0;
+      const text = ta.value;
+      const hasSelection = start < end;
+
+      if (e.key.toLowerCase() === 'k') {
+        if (!hasSelection) {
+          setShowLinkModal(true);
+          return;
+        }
+        const selected = text.slice(start, end);
+        const placeholder = '…';
+        const before = text.slice(0, start);
+        const after = text.slice(end);
+        const inserted = `[${selected}](${placeholder})`;
+        const newVal = before + inserted + after;
+        const selStart = start + 1 + selected.length + 2;
+        const selEnd = selStart + placeholder.length;
+        applyFormattingChange(newVal, selStart, selEnd);
+        return;
+      }
+
+      const isBold = e.key.toLowerCase() === 'b';
+      const delim = isBold ? '**' : '*';
+
+      if (!hasSelection) {
+        const pair = isBold ? '****' : '**';
+        const newVal = text.slice(0, start) + pair + text.slice(start);
+        const newPos = start + delim.length;
+        applyFormattingChange(newVal, newPos, newPos);
+        return;
+      }
+
+      const selected = text.slice(start, end);
+
+      if (isBold) {
+        const isOutside =
+          start >= 2 &&
+          end + 2 <= text.length &&
+          text.slice(start - 2, start) === '**' &&
+          text.slice(end, end + 2) === '**';
+
+        const isInside =
+          selected.length >= 4 &&
+          selected.startsWith('**') &&
+          selected.endsWith('**');
+
+        if (isOutside) {
+          const newVal = text.slice(0, start - 2) + selected + text.slice(end + 2);
+          applyFormattingChange(newVal, start - 2, end - 2);
+          return;
+        }
+        if (isInside) {
+          const unwrapped = selected.slice(2, -2);
+          const newVal = text.slice(0, start) + unwrapped + text.slice(end);
+          applyFormattingChange(newVal, start, start + unwrapped.length);
+          return;
+        }
+
+        const newVal = text.slice(0, start) + '**' + selected + '**' + text.slice(end);
+        applyFormattingChange(newVal, start + 2, end + 2);
+        return;
+      } else {
+        const isOutside =
+          start >= 1 &&
+          end + 1 <= text.length &&
+          text[start - 1] === '*' &&
+          text[end] === '*' &&
+          (start < 2 || text[start - 2] !== '*') &&
+          (end + 1 >= text.length || text[end + 1] !== '*');
+
+        const isInside =
+          selected.length >= 2 &&
+          selected.startsWith('*') &&
+          selected.endsWith('*') &&
+          (!selected.startsWith('**') || !selected.endsWith('**') || selected.length < 4);
+
+        if (isOutside) {
+          const newVal = text.slice(0, start - 1) + selected + text.slice(end + 1);
+          applyFormattingChange(newVal, start - 1, end - 1);
+          return;
+        }
+        if (isInside) {
+          const unwrapped = selected.slice(1, -1);
+          const newVal = text.slice(0, start) + unwrapped + text.slice(end);
+          applyFormattingChange(newVal, start, start + unwrapped.length);
+          return;
+        }
+
+        const newVal = text.slice(0, start) + '*' + selected + '*' + text.slice(end);
+        applyFormattingChange(newVal, start + 1, end + 1);
+        return;
+      }
+    }
+
     // Slash command navigation
     if (slashSearch !== null) {
       if (e.key === 'Escape') {
diff --git a/frontend/src/features/workspace/__tests__/CodeBlockEditor.test.tsx b/frontend/src/features/workspace/__tests__/CodeBlockEditor.test.tsx
index b116ab0..a107a71 100644
--- a/frontend/src/features/workspace/__tests__/CodeBlockEditor.test.tsx
+++ b/frontend/src/features/workspace/__tests__/CodeBlockEditor.test.tsx
@@ -209,4 +209,55 @@ describe('CodeBlockEditor', () => {
     expect(res2.updates[res2.updates.length - 1]?.type).toBe('code');
     expect(res2.updates[res2.updates.length - 1]?.lang).toBe('json');
   });
+
+  it('renders line numbers column with aria-hidden, user-select: none, and correct line count including trailing empty lines and 100+ lines', () => {
+    // 1. Single empty line
+    const { container, rerender } = render(
+      <CodeBlockEditor block={makeCodeBlock({ id: 'code-empty', content: '' })} content="" canEdit />
+    );
+    const getLineContainer = () => container.querySelector('[data-testid="code-line-numbers"]') as HTMLElement;
+    expect(getLineContainer()).toBeTruthy();
+    expect(getLineContainer().getAttribute('aria-hidden')).toBe('true');
+    expect(getLineContainer().className).toContain('select-none');
+
+    let lineEls = container.querySelectorAll('[data-line-number]');
+    expect(lineEls).toHaveLength(1);
+    expect(lineEls[0].textContent?.trim()).toBe('1');
+
+    // 2. Trailing empty line gives an extra line number (e.g. line 1 + empty line 2)
+    rerender(
+      <CodeBlockEditor
+        block={makeCodeBlock({ id: 'code-trailing', content: `first line
+` })}
+        content={`first line
+`}
+        canEdit
+      />
+    );
+    lineEls = container.querySelectorAll('[data-line-number]');
+    expect(lineEls).toHaveLength(2);
+    expect(lineEls[0].textContent?.trim()).toBe('1');
+    expect(lineEls[1].textContent?.trim()).toBe('2');
+
+    // 3. 120 lines (100+ lines test)
+    const longCode = Array.from({ length: 120 }, (_, i) => `const x_${i + 1} = ${i + 1};`).join('\n');
+    rerender(
+      <CodeBlockEditor
+        block={makeCodeBlock({ id: 'code-long', content: longCode })}
+        content={longCode}
+        canEdit
+      />
+    );
+    lineEls = container.querySelectorAll('[data-line-number]');
+    expect(lineEls).toHaveLength(120);
+    expect(lineEls[0].textContent?.trim()).toBe('1');
+    expect(lineEls[99].textContent?.trim()).toBe('100');
+    expect(lineEls[119].textContent?.trim()).toBe('120');
+
+    // Textarea has whitespace-pre and overlay has whitespace-pre
+    const textarea = container.querySelector('textarea') as HTMLTextAreaElement;
+    const pre = container.querySelector('pre') as HTMLPreElement;
+    expect(textarea.className).toContain('whitespace-pre');
+    expect(pre.className).toContain('whitespace-pre');
+  });
 });
diff --git a/frontend/src/features/workspace/__tests__/OutlinerBlock.caret.test.tsx b/frontend/src/features/workspace/__tests__/OutlinerBlock.caret.test.tsx
index c5b4d28..39c493b 100644
--- a/frontend/src/features/workspace/__tests__/OutlinerBlock.caret.test.tsx
+++ b/frontend/src/features/workspace/__tests__/OutlinerBlock.caret.test.tsx
@@ -255,3 +255,123 @@ describe('slash command menu and outliner fixes', () => {
     expect(updates[updates.length - 1]?.content).toBe('Siehe [Doku](https://example.com/doku)');
   });
 });
+
+describe('formatting shortcuts (Teil C)', () => {
+  it('toggles bold with and without selection (Ctrl+B and Cmd+B)', () => {
+    const block = { id: 'b1', type: 'bullet', content: 'hallo welt', level: 0 } as DocumentBlock;
+    const { container } = renderBlock(block);
+    const ta = container.querySelector('textarea') as HTMLTextAreaElement;
+    ta.focus();
+
+    // 1. With selection: wraps in **
+    ta.setSelectionRange(6, 10); // "welt"
+    const event1 = new KeyboardEvent('keydown', { key: 'b', ctrlKey: true, bubbles: true, cancelable: true });
+    ta.dispatchEvent(event1);
+    expect(event1.defaultPrevented).toBe(true);
+    expect(ta.value).toBe('hallo **welt**');
+    expect(ta.selectionStart).toBe(8);
+    expect(ta.selectionEnd).toBe(12);
+
+    // 2. With selection where delimiters are directly outside: unwraps **
+    const event2 = new KeyboardEvent('keydown', { key: 'b', metaKey: true, bubbles: true, cancelable: true });
+    ta.dispatchEvent(event2);
+    expect(event2.defaultPrevented).toBe(true);
+    expect(ta.value).toBe('hallo welt');
+    expect(ta.selectionStart).toBe(6);
+    expect(ta.selectionEnd).toBe(10);
+
+    // 3. With selection including delimiters: unwraps **
+    ta.value = 'hallo **welt**';
+    ta.setSelectionRange(6, 14); // "**welt**"
+    const event3 = new KeyboardEvent('keydown', { key: 'b', ctrlKey: true, bubbles: true, cancelable: true });
+    ta.dispatchEvent(event3);
+    expect(ta.value).toBe('hallo welt');
+    expect(ta.selectionStart).toBe(6);
+    expect(ta.selectionEnd).toBe(10);
+
+    // 4. Without selection: inserts **** and places cursor between
+    ta.value = 'start';
+    ta.setSelectionRange(5, 5);
+    const event4 = new KeyboardEvent('keydown', { key: 'b', ctrlKey: true, bubbles: true, cancelable: true });
+    ta.dispatchEvent(event4);
+    expect(ta.value).toBe('start****');
+    expect(ta.selectionStart).toBe(7);
+    expect(ta.selectionEnd).toBe(7);
+  });
+
+  it('toggles italic with and without selection (Ctrl+I)', () => {
+    const block = { id: 'b1', type: 'bullet', content: 'hallo welt', level: 0 } as DocumentBlock;
+    const { container } = renderBlock(block);
+    const ta = container.querySelector('textarea') as HTMLTextAreaElement;
+    ta.focus();
+
+    // 1. With selection: wraps in *
+    ta.setSelectionRange(6, 10); // "welt"
+    fireEvent.keyDown(ta, { key: 'i', ctrlKey: true });
+    expect(ta.value).toBe('hallo *welt*');
+    expect(ta.selectionStart).toBe(7);
+    expect(ta.selectionEnd).toBe(11);
+
+    // 2. Toggles off when already italic
+    fireEvent.keyDown(ta, { key: 'i', ctrlKey: true });
+    expect(ta.value).toBe('hallo welt');
+    expect(ta.selectionStart).toBe(6);
+    expect(ta.selectionEnd).toBe(10);
+
+    // 3. Without selection: inserts ** and places cursor between
+    fireEvent.change(ta, { target: { value: 'a' } });
+    ta.setSelectionRange(1, 1);
+    fireEvent.keyDown(ta, { key: 'i', ctrlKey: true });
+    expect(ta.value).toBe('a**');
+    expect(ta.selectionStart).toBe(2);
+    expect(ta.selectionEnd).toBe(2);
+  });
+
+  it('handles Ctrl+K: with selection wraps in [Text](…) and selects placeholder, without selection opens modal', () => {
+    const block = { id: 'b1', type: 'bullet', content: 'besuche mindsift heute', level: 0 } as DocumentBlock;
+    const { container, queryByText } = renderBlock(block);
+    const ta = container.querySelector('textarea') as HTMLTextAreaElement;
+    ta.focus();
+
+    // 1. With selection
+    ta.setSelectionRange(8, 16); // "mindsift"
+    const eventWithSel = new KeyboardEvent('keydown', { key: 'k', ctrlKey: true, bubbles: true, cancelable: true });
+    ta.dispatchEvent(eventWithSel);
+    expect(eventWithSel.defaultPrevented).toBe(true);
+    expect(ta.value).toBe('besuche [mindsift](…) heute');
+    // Placeholder "…" is selected
+    expect(ta.selectionStart).toBe(19);
+    expect(ta.selectionEnd).toBe(20);
+    expect(ta.value.slice(ta.selectionStart, ta.selectionEnd)).toBe('…');
+
+    // 2. Without selection: opens LinkModal
+    ta.setSelectionRange(0, 0);
+    expect(queryByText('Link einfügen')).toBeNull();
+    fireEvent.keyDown(ta, { key: 'k', ctrlKey: true });
+    expect(queryByText('Link einfügen')).toBeTruthy();
+  });
+
+  it('does nothing in code blocks or for read-only readers', () => {
+    // In code block
+    const codeBlock = { id: 'c1', type: 'code', content: 'const x = 1;', level: 0 } as DocumentBlock;
+    const codeView = renderBlock(codeBlock);
+    const codeTa = codeView.container.querySelector('textarea') as HTMLTextAreaElement;
+    codeTa.focus();
+    codeTa.setSelectionRange(6, 7); // "x"
+    const codeEvent = new KeyboardEvent('keydown', { key: 'b', ctrlKey: true, bubbles: true, cancelable: true });
+    codeTa.dispatchEvent(codeEvent);
+    expect(codeEvent.defaultPrevented).toBe(false);
+    expect(codeTa.value).toBe('const x = 1;');
+
+    // For readers (!canEdit)
+    const bulletBlock = { id: 'b1', type: 'bullet', content: 'text', level: 0 } as DocumentBlock;
+    const readerView = renderBlock(bulletBlock, { canEdit: false });
+    const readerTa = readerView.container.querySelector('textarea') as HTMLTextAreaElement;
+    readerTa.focus();
+    readerTa.setSelectionRange(0, 4);
+    const readerEvent = new KeyboardEvent('keydown', { key: 'b', ctrlKey: true, bubbles: true, cancelable: true });
+    readerTa.dispatchEvent(readerEvent);
+    expect(readerEvent.defaultPrevented).toBe(false);
+    expect(readerTa.value).toBe('text');
+  });
+});
diff --git a/frontend/src/index.css b/frontend/src/index.css
index c413f42..75839b8 100644
--- a/frontend/src/index.css
+++ b/frontend/src/index.css
@@ -429,11 +429,11 @@ body {
     --code-keyword: #0000ff;
     --code-string: #a31515;
     --code-number: #098658;
-    --code-comment: #008000;
+    --code-comment: #007000;
     --code-property: #0451a5;
     --code-function: #795e26;
     --code-type: #267f99;
-    --code-punctuation: #3b3b3b;
+    --code-punctuation: #2e2e2e;
     --code-variable: #001080;
   }
 
diff --git a/frontend/src/lib/__tests__/markdown.test.tsx b/frontend/src/lib/__tests__/markdown.test.tsx
new file mode 100644
index 0000000..b738108
--- /dev/null
+++ b/frontend/src/lib/__tests__/markdown.test.tsx
@@ -0,0 +1,35 @@
+import { describe, it, expect } from 'vitest';
+import { render } from '@testing-library/react';
+import { renderInlineMarkdown } from '../markdown';
+
+describe('renderInlineMarkdown', () => {
+  it('renders bold text with <strong> tag', () => {
+    const { container } = render(<div>{renderInlineMarkdown('Text mit **fettem** Wort')}</div>);
+    const strong = container.querySelector('strong');
+    expect(strong).toBeTruthy();
+    expect(strong?.textContent).toBe('fettem');
+  });
+
+  it('renders italic text with <em> tag', () => {
+    const { container } = render(<div>{renderInlineMarkdown('Text mit *kursivem* Wort')}</div>);
+    const em = container.querySelector('em');
+    expect(em).toBeTruthy();
+    expect(em?.textContent).toBe('kursivem');
+  });
+
+  it('renders both bold and italic text in one paragraph', () => {
+    const { container } = render(<div>{renderInlineMarkdown('Hier ist **fett** und *kursiv* vereint')}</div>);
+    const strong = container.querySelector('strong');
+    const em = container.querySelector('em');
+    expect(strong?.textContent).toBe('fett');
+    expect(em?.textContent).toBe('kursiv');
+  });
+
+  it('renders links correctly', () => {
+    const { container } = render(<div>{renderInlineMarkdown('[Testseite](https://example.com)')}</div>);
+    const link = container.querySelector('a');
+    expect(link).toBeTruthy();
+    expect(link?.getAttribute('href')).toBe('https://example.com/');
+    expect(link?.textContent).toBe('Testseite');
+  });
+});
diff --git a/frontend/src/themes/theme-light.css b/frontend/src/themes/theme-light.css
index 9d5cb1e..a1539aa 100644
--- a/frontend/src/themes/theme-light.css
+++ b/frontend/src/themes/theme-light.css
@@ -14,24 +14,24 @@
   /* --- 2. OBERFLÄCHEN & HINTERGRÜNDE --- */
   --bg-app: #f3f4f6;
   --bg-panel: #ffffff;
-  --bg-panel-elevated: #ebedf0;
-  --bg-panel-hover: #e2e5ea;
+  --bg-panel-elevated: #e2e8f0;
+  --bg-panel-hover: #cbd5e1;
   --bg-input: #ffffff;
   --bg-overlay: rgba(15, 23, 42, 0.45);
-  --bg-code: #f1f5f9;
+  --bg-code: #e2e8f0;
 
   /* --- 3. TEXT & KONTRASTE --- */
   --text-main: #111827;
-  --text-muted: #4b5563;
-  --text-faint: #9ca3af;
+  --text-muted: #374151;
+  --text-faint: #6b7280;
 
   /* --- 4. RAHMEN, LINIEN & SCHATTEN --- */
-  --border-color: rgba(17, 24, 39, 0.13);
-  --border-subtle: rgba(17, 24, 39, 0.06);
-  --border-strong: rgba(17, 24, 39, 0.28);
+  --border-color: rgba(17, 24, 39, 0.18);
+  --border-subtle: rgba(17, 24, 39, 0.08);
+  --border-strong: rgba(17, 24, 39, 0.32);
   --shadow-panel: 0 8px 24px rgba(15, 23, 42, 0.08);
-  --scrollbar-thumb: rgba(17, 24, 39, 0.18);
-  --scrollbar-thumb-hover: rgba(17, 24, 39, 0.32);
+  --scrollbar-thumb: rgba(17, 24, 39, 0.22);
+  --scrollbar-thumb-hover: rgba(17, 24, 39, 0.38);
 
   /* --- 5. STATUS- & SIGNALFARBEN --- */
   --color-success: #15803d;
@@ -57,10 +57,10 @@
   --code-keyword: #0000ff;
   --code-string: #a31515;
   --code-number: #098658;
-  --code-comment: #008000;
+  --code-comment: #007000;
   --code-property: #0451a5;
   --code-function: #795e26;
   --code-type: #267f99;
-  --code-punctuation: #3b3b3b;
+  --code-punctuation: #2e2e2e;
   --code-variable: #001080;
 }