diff --git a/frontend/app.js b/frontend/app.js
index 52f9535..d2c524b 100644
--- a/frontend/app.js
+++ b/frontend/app.js
@@ -311,6 +311,15 @@ function noteApp() {
         renameFolderOldName: '',
         renameFolderInput: '',
         
+        // Generic confirm dialog (replaces window.confirm)
+        showConfirmModal: false,
+        confirmModalTitle: '',
+        confirmModalMessage: '',
+        confirmModalDanger: true,
+        confirmModalConfirmLabel: '',
+        confirmModalCancelLabel: '',
+        _confirmModalResolve: null,
+        
         // Share state
         showShareModal: false,
         shareInfo: null,
@@ -2689,7 +2698,10 @@ function noteApp() {
         // Delete a media file (image, audio, video, PDF)
         async deleteMedia(mediaPath) {
             const filename = mediaPath.split('/').pop();
-            if (!confirm(this.t('media.confirm_delete', { name: filename }))) return;
+            const ok = await this.confirmModalAsk({
+                message: this.t('media.confirm_delete', { name: filename }),
+            });
+            if (!ok) return;
             
             try {
                 const response = await fetch(`/api/notes/${encodeURIComponent(mediaPath)}`, {
@@ -2777,9 +2789,15 @@ function noteApp() {
                         setTimeout(() => this.scrollToAnchor(anchor), 100);
                     }
                 });
-            } else if (confirm(this.t('notes.create_from_link', { path: notePath }))) {
-                // Note doesn't exist - create it (reuses createNote with duplicate check)
-                this.createNote(null, notePath);
+            } else {
+                this.confirmModalAsk({
+                    message: this.t('notes.create_from_link', { path: notePath }),
+                    danger: false,
+                    title: this.t('sidebar.new_note'),
+                    confirmLabel: this.t('common.create'),
+                }).then((ok) => {
+                    if (ok) this.createNote(null, notePath);
+                });
             }
         },
         
@@ -3558,6 +3576,42 @@ function noteApp() {
             this.closeRenameFolderModal();
         },
         
+        /**
+         * Theme-styled confirm dialog (replaces window.confirm).
+         * @param {{ message: string, title?: string, danger?: boolean, confirmLabel?: string, cancelLabel?: string }} options
+         * @returns {Promise<boolean>}
+         */
+        confirmModalAsk(options = {}) {
+            const { message, title, danger = true, confirmLabel, cancelLabel } = options;
+            return new Promise((resolve) => {
+                this.confirmModalTitle = title || this.t('common.confirm_title');
+                this.confirmModalMessage = message || '';
+                this.confirmModalDanger = danger;
+                this.confirmModalConfirmLabel = confirmLabel
+                    || (danger ? this.t('common.delete') : this.t('common.ok'));
+                this.confirmModalCancelLabel = cancelLabel || this.t('common.cancel');
+                this._confirmModalResolve = resolve;
+                this.showConfirmModal = true;
+                this.mobileSidebarOpen = false;
+            });
+        },
+        
+        confirmModalConfirm() {
+            this._confirmModalFinish(true);
+        },
+        
+        confirmModalCancel() {
+            this._confirmModalFinish(false);
+        },
+        
+        _confirmModalFinish(ok) {
+            if (!this._confirmModalResolve) return;
+            this.showConfirmModal = false;
+            const fn = this._confirmModalResolve;
+            this._confirmModalResolve = null;
+            fn(!!ok);
+        },
+        
         async submitRenameFolderModal() {
             const folderPath = this.renameFolderPath;
             const currentName = this.renameFolderOldName;
@@ -3630,9 +3684,10 @@ function noteApp() {
         
         // Delete folder
         async deleteFolder(folderPath, folderName) {
-            const confirmation = confirm(this.t('folders.confirm_delete', { name: folderName }));
-            
-            if (!confirmation) return;
+            const ok = await this.confirmModalAsk({
+                message: this.t('folders.confirm_delete', { name: folderName }),
+            });
+            if (!ok) return;
             
             try {
                 const response = await fetch(`/api/folders/${encodeURIComponent(folderPath)}`, {
@@ -4128,7 +4183,10 @@ function noteApp() {
         
         // Delete any note from sidebar
         async deleteNote(notePath, noteName) {
-            if (!confirm(this.t('notes.confirm_delete', { name: noteName }))) return;
+            const ok = await this.confirmModalAsk({
+                message: this.t('notes.confirm_delete', { name: noteName }),
+            });
+            if (!ok) return;
             
             try {
                 const response = await fetch(`/api/notes/${notePath}`, {
@@ -5647,7 +5705,12 @@ function noteApp() {
         async revokeShareLink() {
             if (!this.currentNote) return;
             
-            if (!confirm(this.t('share.confirm_revoke'))) return;
+            const ok = await this.confirmModalAsk({
+                message: this.t('share.confirm_revoke'),
+                danger: false,
+                confirmLabel: this.t('common.yes'),
+            });
+            if (!ok) return;
             
             this.shareLoading = true;
             
diff --git a/frontend/index.html b/frontend/index.html
index 25e820f..069440c 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -3300,6 +3300,45 @@
         </div>
     </div>
     
+    <!-- Confirm dialog (replaces window.confirm) -->
+    <div x-show="showConfirmModal"
+         @click.self="confirmModalCancel()"
+         @keydown.escape.window="showConfirmModal && confirmModalCancel()"
+         class="fixed inset-0 flex items-center justify-center p-4"
+         style="background-color: rgba(0, 0, 0, 0.5); z-index: 1250;"
+         x-cloak>
+        <div class="rounded-lg shadow-xl p-6 max-w-lg w-full mx-auto max-h-[90vh] overflow-y-auto"
+             style="background-color: var(--bg-secondary); color: var(--text-primary);"
+             @click.stop
+             role="alertdialog"
+             aria-modal="true"
+             :aria-labelledby="'confirm-modal-title'"
+             :aria-describedby="'confirm-modal-desc'">
+            <h2 id="confirm-modal-title" class="text-xl font-bold mb-3" style="color: var(--text-primary);" x-text="confirmModalTitle"></h2>
+            <p id="confirm-modal-desc" class="text-sm mb-6 whitespace-pre-line leading-relaxed" style="color: var(--text-secondary);" x-text="confirmModalMessage"></p>
+            <div class="flex flex-col-reverse sm:flex-row gap-2 sm:justify-end">
+                <button
+                    type="button"
+                    @click="confirmModalCancel()"
+                    class="w-full sm:w-auto px-4 py-2.5 rounded font-medium transition-colors"
+                    style="background-color: var(--bg-tertiary); color: var(--text-primary);"
+                    onmouseover="this.style.backgroundColor='var(--bg-hover)'"
+                    onmouseout="this.style.backgroundColor='var(--bg-tertiary)'"
+                    x-text="confirmModalCancelLabel"
+                ></button>
+                <button
+                    type="button"
+                    @click="confirmModalConfirm()"
+                    class="w-full sm:w-auto px-4 py-2.5 rounded font-medium text-white transition-colors"
+                    :style="confirmModalDanger ? 'background-color: var(--error);' : 'background-color: var(--accent-primary);'"
+                    @mouseenter="$el.style.backgroundColor = confirmModalDanger ? '#dc2626' : 'var(--accent-hover)'"
+                    @mouseleave="$el.style.backgroundColor = confirmModalDanger ? 'var(--error)' : 'var(--accent-primary)'"
+                    x-text="confirmModalConfirmLabel"
+                ></button>
+            </div>
+        </div>
+    </div>
+    
     <!-- Quick Switcher Modal (Ctrl+K) -->
     <div x-show="showQuickSwitcher" 
          @click.self="closeQuickSwitcher()"
diff --git a/locales/de-DE.json b/locales/de-DE.json
index e4e50c1..1692c3c 100644
--- a/locales/de-DE.json
+++ b/locales/de-DE.json
@@ -16,6 +16,7 @@
     "rename": "Umbenennen",
     "create": "Erstellen",
     "close": "Schließen",
+    "confirm_title": "Bestätigen",
     "yes": "✓ Ja",
     "no": "✗ Nein",
     "ok": "OK",
diff --git a/locales/en-GB.json b/locales/en-GB.json
index 17a93ce..56b4e8b 100644
--- a/locales/en-GB.json
+++ b/locales/en-GB.json
@@ -16,6 +16,7 @@
     "rename": "Rename",
     "create": "Create",
     "close": "Close",
+    "confirm_title": "Confirm",
     "yes": "✓ Yes",
     "no": "✗ No",
     "ok": "OK",
diff --git a/locales/en-US.json b/locales/en-US.json
index 4211c5f..94f0d7d 100644
--- a/locales/en-US.json
+++ b/locales/en-US.json
@@ -16,6 +16,7 @@
     "rename": "Rename",
     "create": "Create",
     "close": "Close",
+    "confirm_title": "Confirm",
     "yes": "✓ Yes",
     "no": "✗ No",
     "ok": "OK",
diff --git a/locales/es-ES.json b/locales/es-ES.json
index 78933a0..59dd15b 100644
--- a/locales/es-ES.json
+++ b/locales/es-ES.json
@@ -16,6 +16,7 @@
     "rename": "Renombrar",
     "create": "Crear",
     "close": "Cerrar",
+    "confirm_title": "Confirmar",
     "yes": "✓ Sí",
     "no": "✗ No",
     "ok": "Aceptar",
diff --git a/locales/fr-FR.json b/locales/fr-FR.json
index 543b726..6cc1d7e 100644
--- a/locales/fr-FR.json
+++ b/locales/fr-FR.json
@@ -16,6 +16,7 @@
     "rename": "Renommer",
     "create": "Créer",
     "close": "Fermer",
+    "confirm_title": "Confirmer",
     "yes": "✓ Oui",
     "no": "✗ Non",
     "ok": "OK",
diff --git a/locales/hu-HU.json b/locales/hu-HU.json
index e723098..69b92a9 100644
--- a/locales/hu-HU.json
+++ b/locales/hu-HU.json
@@ -16,6 +16,7 @@
     "rename": "Átnevez",
     "create": "Létrehoz",
     "close": "Bezár",
+    "confirm_title": "Megerősítés",
     "yes": "✓ Igen",
     "no": "✗ Nem",
     "ok": "OK",
diff --git a/locales/it-IT.json b/locales/it-IT.json
index e8fb34b..c53c818 100644
--- a/locales/it-IT.json
+++ b/locales/it-IT.json
@@ -16,6 +16,7 @@
     "rename": "Rinomina",
     "create": "Crea",
     "close": "Chiudi",
+    "confirm_title": "Conferma",
     "yes": "✓ Sì",
     "no": "✗ No",
     "ok": "OK",
diff --git a/locales/ja-JP.json b/locales/ja-JP.json
index 6fce4c1..4b70848 100644
--- a/locales/ja-JP.json
+++ b/locales/ja-JP.json
@@ -16,6 +16,7 @@
     "rename": "名前変更",
     "create": "作成",
     "close": "閉じる",
+    "confirm_title": "確認",
     "yes": "✓ はい",
     "no": "✗ いいえ",
     "ok": "OK",
diff --git a/locales/ru-RU.json b/locales/ru-RU.json
index edbee14..a26e03b 100644
--- a/locales/ru-RU.json
+++ b/locales/ru-RU.json
@@ -16,6 +16,7 @@
     "rename": "Переименовать",
     "create": "Создать",
     "close": "Закрыть",
+    "confirm_title": "Подтвердить",
     "yes": "✓ Да",
     "no": "✗ Нет",
     "ok": "ОК",
diff --git a/locales/sl-SI.json b/locales/sl-SI.json
index 6b90bc0..a997980 100644
--- a/locales/sl-SI.json
+++ b/locales/sl-SI.json
@@ -16,6 +16,7 @@
     "rename": "Preimenuj",
     "create": "Ustvari",
     "close": "Zapri",
+    "confirm_title": "Potrdi",
     "yes": "✓ Da",
     "no": "✗ Ne",
     "ok": "V redu",
diff --git a/locales/zh-CN.json b/locales/zh-CN.json
index 6e61f88..132623e 100644
--- a/locales/zh-CN.json
+++ b/locales/zh-CN.json
@@ -16,6 +16,7 @@
     "rename": "重命名",
     "create": "创建",
     "close": "关闭",
+    "confirm_title": "确认",
     "yes": "✓ 是",
     "no": "✗ 否",
     "ok": "确定",