diff --git a/partials/structure/layout_end.php b/partials/structure/layout_end.php
index 7111a29..126bd31 100755
--- a/partials/structure/layout_end.php
+++ b/partials/structure/layout_end.php
@@ -5,5 +5,26 @@
     <div class="footer-right">Security first · Internal only</div>
   </footer>
   <?php asset_scripts('footer'); ?>
+  <?php if (defined('APP_DEBUG_TOOL') && APP_DEBUG_TOOL): ?>
+    <div class="debug-modal" id="debug-modal" aria-hidden="true">
+      <div class="debug-modal__backdrop" data-debug-close></div>
+      <div class="debug-modal__panel card">
+        <div class="debug-modal__header">
+          <strong>Debug Logs</strong>
+          <button class="debug-modal__close" data-debug-close type="button">✕</button>
+        </div>
+        <div class="debug-modal__body">
+          <div class="debug-modal__list">
+            <div class="muted">Logs</div>
+            <ul id="debug-log-list"></ul>
+          </div>
+          <div class="debug-modal__content">
+            <div class="muted">Inhalt</div>
+            <pre id="debug-log-content"></pre>
+          </div>
+        </div>
+      </div>
+    </div>
+  <?php endif; ?>
 </body>
 </html>
diff --git a/partials/structure/layout_start.php b/partials/structure/layout_start.php
index fa0be00..123a252 100755
--- a/partials/structure/layout_start.php
+++ b/partials/structure/layout_start.php
@@ -102,5 +102,5 @@ $sidebarItems = $moduleSidebar['items'] ?? [];
       <?php endif; ?>
 
       <?php if (defined('APP_DEBUG_TOOL') && APP_DEBUG_TOOL): ?>
-        <a class="debug-fab" href="/debug" title="Debug">🐞</a>
+        <button class="debug-fab" data-debug-open title="Debug" type="button">🐞</button>
       <?php endif; ?>
diff --git a/public/assets/css/app.css b/public/assets/css/app.css
index d5fb4e0..84ba159 100644
--- a/public/assets/css/app.css
+++ b/public/assets/css/app.css
@@ -239,6 +239,71 @@ body {
   font-size: 22px;
   box-shadow: 0 16px 32px rgba(255, 90, 61, 0.28);
   z-index: 50;
+  border: none;
+  cursor: pointer;
+}
+
+.debug-modal {
+  position: fixed;
+  inset: 0;
+  display: none;
+  z-index: 80;
+}
+.debug-modal.is-open { display: block; }
+.debug-modal__backdrop {
+  position: absolute;
+  inset: 0;
+  background: rgba(10, 12, 20, 0.35);
+}
+.debug-modal__panel {
+  position: relative;
+  max-width: 980px;
+  width: calc(100% - 40px);
+  margin: 60px auto;
+  padding: 16px;
+}
+.debug-modal__header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 12px;
+}
+.debug-modal__close {
+  background: transparent;
+  border: none;
+  font-size: 20px;
+  cursor: pointer;
+}
+.debug-modal__body {
+  display: grid;
+  grid-template-columns: 220px 1fr;
+  gap: 16px;
+}
+.debug-modal__list ul {
+  list-style: none;
+  padding: 0;
+  margin: 8px 0 0;
+  display: grid;
+  gap: 6px;
+}
+.debug-modal__list a {
+  text-decoration: none;
+  color: var(--text);
+  padding: 6px 8px;
+  border-radius: 8px;
+  display: block;
+}
+.debug-modal__list a:hover { background: var(--panel-2); }
+.debug-modal__content pre {
+  background: var(--panel-2);
+  padding: 10px;
+  border-radius: 8px;
+  max-height: 520px;
+  overflow: auto;
+  white-space: pre-wrap;
+}
+@media (max-width: 800px) {
+  .debug-modal__body { grid-template-columns: 1fr; }
 }
 
 .muted { color: var(--muted); }
diff --git a/public/assets/js/app.js b/public/assets/js/app.js
index 7b53938..c260e43 100755
--- a/public/assets/js/app.js
+++ b/public/assets/js/app.js
@@ -27,3 +27,57 @@
     });
   });
 })();
+
+(() => {
+  const openBtn = document.querySelector('[data-debug-open]');
+  const modal = document.getElementById('debug-modal');
+  if (!openBtn || !modal) return;
+
+  const listEl = document.getElementById('debug-log-list');
+  const contentEl = document.getElementById('debug-log-content');
+  const closeEls = modal.querySelectorAll('[data-debug-close]');
+
+  const open = () => {
+    modal.classList.add('is-open');
+    modal.setAttribute('aria-hidden', 'false');
+    loadList();
+  };
+  const close = () => {
+    modal.classList.remove('is-open');
+    modal.setAttribute('aria-hidden', 'true');
+  };
+
+  const loadList = async () => {
+    try {
+      const res = await fetch('/debug?list=1', { cache: 'no-store' });
+      const files = await res.json();
+      listEl.innerHTML = '';
+      files.forEach((f) => {
+        const a = document.createElement('a');
+        a.href = '#';
+        a.textContent = f;
+        a.addEventListener('click', (e) => {
+          e.preventDefault();
+          loadFile(f);
+        });
+        const li = document.createElement('li');
+        li.appendChild(a);
+        listEl.appendChild(li);
+      });
+      if (files.includes('oidc_login.log')) {
+        loadFile('oidc_login.log');
+      }
+    } catch (e) {}
+  };
+
+  const loadFile = async (name) => {
+    try {
+      const res = await fetch(`/debug?raw=1&file=${encodeURIComponent(name)}`, { cache: 'no-store' });
+      const text = await res.text();
+      contentEl.textContent = text;
+    } catch (e) {}
+  };
+
+  openBtn.addEventListener('click', open);
+  closeEls.forEach((el) => el.addEventListener('click', close));
+})();
diff --git a/public/page/debug.php b/public/page/debug.php
index 0e54e9e..ea35f95 100644
--- a/public/page/debug.php
+++ b/public/page/debug.php
@@ -28,6 +28,12 @@ if ($selected !== '' && preg_match('/^[a-zA-Z0-9._-]+$/', $selected)) {
     }
 }
 
+if (isset($_GET['list']) && $_GET['list'] === '1') {
+    header('Content-Type: application/json; charset=utf-8');
+    echo json_encode($files);
+    return;
+}
+
 if (isset($_GET['raw']) && $_GET['raw'] === '1') {
     header('Content-Type: text/plain; charset=utf-8');
     echo $content ?? '';