diff --git a/index.html b/index.html
index 8e10417..45f09eb 100644
--- a/index.html
+++ b/index.html
@@ -376,6 +376,10 @@ body { background:var(--bg); color:var(--text); font-family:-apple-system,BlinkM
 .promote-ok    { flex:1; padding:7px; background:var(--accent); color:#fff; border:none; border-radius:5px; font-size:12px; font-weight:700; cursor:pointer; }
 .promote-ok:hover { opacity:.85; }
 .promote-cancel { padding:7px 12px; background:var(--surface2); border:1px solid var(--border2); color:var(--text-muted); border-radius:5px; font-size:12px; cursor:pointer; }
+.confirm-box { background:var(--surface); border:1px solid var(--border2); border-radius:10px; padding:20px; width:260px; box-shadow:0 8px 32px rgba(0,0,0,.5); }
+.confirm-msg { font-size:13px; color:var(--text); margin-bottom:14px; }
+.confirm-ok  { flex:1; padding:7px; background:var(--red); color:#fff; border:none; border-radius:5px; font-size:12px; font-weight:700; cursor:pointer; }
+.confirm-ok:hover { opacity:.85; }
 </style>
 </head>
 <body>
@@ -514,6 +518,16 @@ body { background:var(--bg); color:var(--text); font-family:-apple-system,BlinkM
   </div>
 </div>
 
+<div id="confirm-overlay" style="display:none" class="promote-overlay" onclick="if(event.target===this)closeConfirm()">
+  <div class="confirm-box">
+    <div class="confirm-msg" id="confirm-msg"></div>
+    <div class="promote-btns">
+      <button class="confirm-ok" id="confirm-ok">Löschen</button>
+      <button class="promote-cancel" onclick="closeConfirm()">Abbrechen</button>
+    </div>
+  </div>
+</div>
+
 <script>
 // ── BOARD DATA ────────────────────────────────────────────────────────────
 const TODAY = new Date('2026-05-19');
@@ -934,6 +948,9 @@ function getBoardsForGroup(g) {
 
 // ── STATE (localStorage) ──────────────────────────────────────────────────
 let BOARDS = {};
+let HIDDEN_BOARDS = new Set();
+function loadHidden() { try { HIDDEN_BOARDS = new Set(JSON.parse(localStorage.getItem('kanban_hidden') || '[]')); } catch {} }
+function saveHidden() { localStorage.setItem('kanban_hidden', JSON.stringify([...HIDDEN_BOARDS])); }
 
 function deepClone(o) { return JSON.parse(JSON.stringify(o)); }
 
@@ -956,6 +973,7 @@ function migrateCols(board) {
 
 function loadState() {
   BOARDS = deepClone(DEFAULTS);
+  HIDDEN_BOARDS.forEach(id => { delete BOARDS[id]; });
   Object.keys(BOARDS).forEach(id => {
     const m = BOARD_META[id] || {group:'Privat', color:'#7c6af7', ring:'?'};
     BOARDS[id].group = m.group;
@@ -1069,28 +1087,31 @@ function saveBoardSetting(key, el, min, max) {
   if (curView === 'analytics') renderAnalytics(curId);
 }
 
+function showConfirm(msg, onOk) {
+  document.getElementById('confirm-msg').textContent = msg;
+  document.getElementById('confirm-ok').onclick = () => { closeConfirm(); onOk(); };
+  document.getElementById('confirm-overlay').style.display = 'flex';
+}
+function closeConfirm() { document.getElementById('confirm-overlay').style.display = 'none'; }
+
 function resetCurrentBoard() {
   const b = BOARDS[curId];
-  if (b.userCreated) {
-    if (!confirm(`"${b.name}" löschen?`)) return;
-    deleteBoard(curId);
-    return;
-  }
-  if (!confirm(`"${b.name}" auf Standardzustand zurücksetzen?`)) return;
-  BOARDS[curId].cols = deepClone(DEFAULTS[curId].cols);
-  saveState();
-  show(curId);
-  renderSidebar();
+  if (b.userCreated) { deleteBoard(curId); return; }
+  showConfirm(`"${b.name}" auf Standardzustand zurücksetzen?`, () => {
+    BOARDS[curId].cols = deepClone(DEFAULTS[curId].cols);
+    saveState(); show(curId); renderSidebar();
+  });
 }
 
 function deleteBoard(id, e) {
   if (e) e.stopPropagation();
-  if (!confirm(`"${BOARDS[id].name}" löschen?`)) return;
-  delete BOARDS[id];
-  saveState();
-  const firstId = Object.keys(BOARDS)[0];
-  show(firstId);
-  renderSidebar();
+  showConfirm(`"${BOARDS[id]?.name}" wirklich löschen?`, () => {
+    if (!BOARDS[id].userCreated) { HIDDEN_BOARDS.add(id); saveHidden(); }
+    delete BOARDS[id];
+    saveState();
+    const firstId = Object.keys(BOARDS)[0];
+    show(firstId); renderSidebar();
+  });
 }
 
 function addCard(boardId, colId, text) {
@@ -2157,8 +2178,7 @@ function renderSidebar() {
       const rem = remaining(b);
       const blk = hasBlocker(b);
       const badgeCls = blk ? ' blk' : colCount(b,'wip') > 0 ? ' wip' : '';
-      const del = b.userCreated
-        ? `<span class="nav-del" onclick="deleteBoard('${id}',event)">×</span>` : '';
+      const del = `<span class="nav-del" onclick="deleteBoard('${id}',event)">×</span>`;
       const ring = b.ring || '?';
       const ringCls = ring === '?' ? 'r-q' : 'r-' + ring;
       const ringLbl = RING_LABELS[ring] || '?';
@@ -2376,7 +2396,7 @@ function renderIdeas() {
 
 // ── EXPORT / IMPORT ──────────────────────────────────────────────────────────
 function exportState() {
-  const keys = ['kanban_v2','kanban_groups','kanban_board_order','kanban_ideas','kanban_ideas_seeded','kanban_cards_seeded'];
+  const keys = ['kanban_v2','kanban_groups','kanban_board_order','kanban_ideas','kanban_ideas_seeded','kanban_hidden'];
   const snap = {};
   keys.forEach(k => { const v = localStorage.getItem(k); if (v !== null) snap[k] = v; });
   const blob = new Blob([JSON.stringify(snap, null, 2)], {type:'application/json'});
@@ -2407,6 +2427,7 @@ if (window.location.protocol === 'file:') {
 }
 loadGroups();
 loadBoardOrder();
+loadHidden();
 loadState();
 renderSidebar();
 loadIdeas();
