diff --git a/.opencode/plans/server-thresholds.md b/.opencode/plans/server-thresholds.md
new file mode 100644
index 0000000..3c439f5
--- /dev/null
+++ b/.opencode/plans/server-thresholds.md
@@ -0,0 +1,256 @@
+# Plan: Umbrales de notificación por servidor
+
+## Archivos a modificar/crear
+
+### 1. `database/migrations/012_server_thresholds.sql` — CREAR
+
+```sql
+ALTER TABLE `servers`
+  ADD COLUMN `threshold_cpu_warning`  DECIMAL(5,2) DEFAULT 80.00 AFTER `agent_last_seen_at`,
+  ADD COLUMN `threshold_cpu_critical` DECIMAL(5,2) DEFAULT 95.00 AFTER `threshold_cpu_warning`,
+  ADD COLUMN `threshold_ram_warning`  DECIMAL(5,2) DEFAULT 80.00 AFTER `threshold_cpu_critical`,
+  ADD COLUMN `threshold_ram_critical` DECIMAL(5,2) DEFAULT 95.00 AFTER `threshold_ram_warning`,
+  ADD COLUMN `threshold_disk_warning` DECIMAL(5,2) DEFAULT 85.00 AFTER `threshold_disk_warning`,
+  ADD COLUMN `threshold_disk_critical` DECIMAL(5,2) DEFAULT 95.00 AFTER `threshold_disk_critical`;
+```
+
+### 2. `src/Core/Database.php` — MODIFICAR
+
+Agregar método `fetchCol()` después de `fetchAll()`:
+
+```php
+    public function fetchCol(string $sql, array $params = []): array
+    {
+        return $this->query($sql, $params)->fetchAll(\PDO::FETCH_COLUMN);
+    }
+```
+
+### 3. `src/Models/Server.php` — MODIFICAR
+
+Agregar método `getAccessibleUserIds()` antes de `findByAgentKey()`:
+
+```php
+    public function getAccessibleUserIds(int $serverId): array
+    {
+        $direct = $this->db->fetchCol(
+            'SELECT user_id FROM server_user WHERE server_id = ? AND status = \'active\'',
+            [$serverId]
+        );
+
+        $team = $this->db->fetchCol(
+            'SELECT DISTINCT tu.user_id FROM team_user tu
+             JOIN team_server ts ON tu.team_id = ts.team_id
+             WHERE ts.server_id = ? AND tu.status = \'active\' AND ts.status = \'active\'',
+            [$serverId]
+        );
+
+        $owner = $this->db->fetchCol(
+            'SELECT created_by FROM servers WHERE id = ? AND status = \'active\'',
+            [$serverId]
+        );
+
+        return array_unique(array_merge($direct, $team, $owner));
+    }
+```
+
+### 4. `routes/web.php` — MODIFICAR
+
+Agregar después de línea 67 (`/servers/:id/metrics`):
+
+```php
+$router->post('/servers/:id/thresholds', [ServerController::class, 'saveThresholds'], [AuthMiddleware::class, CSRFMiddleware::class]);
+```
+
+### 5. `src/Controllers/ServerController.php` — MODIFICAR
+
+Agregar en `use` imports (si no está ya) + nuevo método después de `metrics()`:
+
+```php
+    public function saveThresholds(int $id): void
+    {
+        $server = $this->requireServerAccess($id, 'manager');
+        $role = $this->serverModel->getUserRole($id, (int) Session::get('user_id'));
+
+        if ($role !== 'owner') {
+            $this->view->json(['success' => false, 'error' => 'Only the server owner can modify notification thresholds.'], 403);
+        }
+
+        $fields = ['cpu_warning', 'cpu_critical', 'ram_warning', 'ram_critical', 'disk_warning', 'disk_critical'];
+        $data = [];
+        foreach ($fields as $f) {
+            $key = 'threshold_' . $f;
+            $data[$key] = isset($_POST[$f]) ? max(0, min(100, (float) $_POST[$f])) : null;
+        }
+
+        $this->serverModel->update($id, $data);
+        $this->auditService->log('thresholds_updated', 'server', $id, $data);
+        $this->view->json(['success' => true, 'message' => 'Notification thresholds updated.']);
+    }
+```
+
+### 6. `src/Controllers/ApiController.php` — MODIFICAR
+
+En `pushMetrics()`, después de `updateAgentLastSeen()` (línea 435) y antes de `$this->view->json(['success' => true])` (línea 437):
+
+```php
+        // --- Verificar umbrales de notificación ---
+        $checks = [
+            'cpu'  => ['val' => $cpu,  'warn' => $server['threshold_cpu_warning'],  'crit' => $server['threshold_cpu_critical']],
+            'ram'  => ['val' => $ram,  'warn' => $server['threshold_ram_warning'],  'crit' => $server['threshold_ram_critical']],
+            'disk' => ['val' => $disk, 'warn' => $server['threshold_disk_warning'], 'crit' => $server['threshold_disk_critical']],
+        ];
+
+        $breaches = [];
+        foreach ($checks as $metric => $c) {
+            if ($c['crit'] !== null && $c['val'] >= (float) $c['crit']) {
+                $breaches[] = ['metric' => $metric, 'level' => 'critical', 'current' => $c['val'], 'threshold' => $c['crit']];
+            } elseif ($c['warn'] !== null && $c['val'] >= (float) $c['warn']) {
+                $breaches[] = ['metric' => $metric, 'level' => 'warning', 'current' => $c['val'], 'threshold' => $c['warn']];
+            }
+        }
+
+        if (!empty($breaches)) {
+            $userIds = $serverModel->getAccessibleUserIds((int) $server['id']);
+            $notificationModel = new \ServerManager\Models\Notification();
+            foreach ($breaches as $b) {
+                $title = strtoupper($b['metric']) . " {$b['level']} on {$server['name']}";
+                $message = "{$server['name']}: {$b['metric']} at {$b['current']}% ({$b['level']} threshold: {$b['threshold']}%)";
+                foreach ($userIds as $uid) {
+                    $notificationModel->create([
+                        'user_id' => (int) $uid,
+                        'title' => $title,
+                        'message' => $message,
+                        'type' => $b['level'],
+                    ]);
+                }
+            }
+        }
+```
+
+Agregar import de Notification en los `use` del ApiController (si no está):
+```php
+use ServerManager\Models\Notification;
+```
+
+### 7. `views/servers/show.php` — MODIFICAR
+
+**a) Botón en Management Actions** (después de línea 272, antes de `<?php endif; ?>`):
+
+```php
+            <?php if ($server_role === 'owner'): ?>
+            <button class="action-card" onclick="showThresholdModal()">
+                <i class="fas fa-bell"></i>
+                <span>Notification Thresholds</span>
+            </button>
+            <?php endif; ?>
+```
+
+**b) Modal** (después del `#agentConfirmModal`, antes de `<form id="csrfForm">`):
+
+```php
+<div id="thresholdModal" class="modal">
+    <div class="modal-dialog">
+        <div class="modal-header">
+            <h3><i class="fas fa-bell"></i> Notification Thresholds</h3>
+            <button type="button" class="modal-close" onclick="closeThresholdModal()">&times;</button>
+        </div>
+        <div class="modal-body">
+            <p class="text-muted" style="margin-bottom:20px">
+                Notifications are sent to all users with access to this server when the agent reports values
+                exceeding these thresholds. Only the server owner can modify them.
+            </p>
+            <form id="thresholdForm" onsubmit="return false">
+                <div class="table-responsive">
+                    <table class="table">
+                        <thead>
+                            <tr>
+                                <th>Resource</th>
+                                <th>Warning (%)</th>
+                                <th>Critical (%)</th>
+                            </tr>
+                        </thead>
+                        <tbody>
+                            <?php foreach (['cpu' => 'CPU', 'ram' => 'RAM', 'disk' => 'Disk'] as $key => $label): ?>
+                            <tr>
+                                <td><strong><?= $label ?></strong></td>
+                                <td>
+                                    <input type="number" name="<?= $key ?>_warning"
+                                           value="<?= htmlspecialchars((string)($server["threshold_{$key}_warning"] ?? 80)) ?>"
+                                           min="0" max="100" step="0.01" class="form-control" style="width:120px">
+                                </td>
+                                <td>
+                                    <input type="number" name="<?= $key ?>_critical"
+                                           value="<?= htmlspecialchars((string)($server["threshold_{$key}_critical"] ?? 95)) ?>"
+                                           min="0" max="100" step="0.01" class="form-control" style="width:120px">
+                                </td>
+                            </tr>
+                            <?php endforeach; ?>
+                        </tbody>
+                    </table>
+                </div>
+            </form>
+        </div>
+        <div class="modal-footer">
+            <button class="btn btn-primary" onclick="saveThresholds()"><i class="fas fa-save"></i> Save</button>
+            <button class="btn btn-secondary" onclick="closeThresholdModal()">Cancel</button>
+        </div>
+    </div>
+</div>
+```
+
+**c) JavaScript** (al final del bloque `<script>`, antes de `</script>`):
+
+```javascript
+function showThresholdModal() {
+    document.getElementById('thresholdModal').style.display = 'flex';
+    document.getElementById('thresholdModal').onclick = function(e) {
+        if (e.target === this) closeThresholdModal();
+    };
+}
+
+function closeThresholdModal() {
+    document.getElementById('thresholdModal').style.display = 'none';
+}
+
+function saveThresholds() {
+    const form = document.getElementById('thresholdForm');
+    const data = new URLSearchParams(new FormData(form));
+    data.append('_csrf_token', getCsrfToken());
+
+    document.querySelector('#thresholdModal .btn-primary').disabled = true;
+
+    fetch('/servers/<?= $server['id'] ?>/thresholds', {
+        method: 'POST',
+        headers: {
+            'Content-Type': 'application/x-www-form-urlencoded',
+            'X-CSRF-Token': getCsrfToken(),
+        },
+        body: data.toString(),
+    })
+    .then(r => r.json())
+    .then(d => {
+        showToast(d.success ? 'success' : 'error', d.message ?? d.error);
+        if (d.success) closeThresholdModal();
+    })
+    .catch(e => showToast('error', 'Request failed: ' + e.message))
+    .finally(() => {
+        document.querySelector('#thresholdModal .btn-primary').disabled = false;
+    });
+}
+```
+
+### 8. Ejecutar migración
+
+```bash
+mysql -u root -p"servermanager2024" servermanager < /var/www/servermanager/database/migrations/012_server_thresholds.sql
+```
+
+### 9. Commit y push
+
+```bash
+git add -A && git commit -m "feat: per-server notification thresholds with alert on agent metrics push" && git push origin feat/fcm-apk-v1.8.2
+```
+
+## Variables de umbral en la vista
+
+Las columnas nuevas (`threshold_cpu_warning`, etc.) viajan automáticamente en `$server` porque `findById()` hace `SELECT *`. No requiere cambios en `ServerController::show()`.
diff --git a/public/assets/css/style.css b/public/assets/css/style.css
index 7f033d2..6c04cc0 100755
--- a/public/assets/css/style.css
+++ b/public/assets/css/style.css
@@ -3306,3 +3306,43 @@ input[type="range"]::-moz-range-track {
     color: var(--text-primary);
     background: var(--bg-hover);
 }
+
+/* ==========================================================================
+   Notification Dropdown Panel
+   ========================================================================== */
+
+.notification-dropdown {
+    display: none;
+    position: absolute;
+    top: calc(100% + 6px);
+    right: 0;
+    width: 380px;
+    max-height: 520px;
+    background: var(--bg-tertiary);
+    border: 1px solid var(--border-color);
+    border-radius: var(--radius-lg);
+    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
+    z-index: 300;
+    overflow: hidden;
+}
+
+.notification-dropdown.open {
+    display: block;
+}
+
+.notif-dropdown-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 12px 16px;
+    border-bottom: 1px solid var(--border-color);
+}
+
+.notif-dropdown-body {
+    max-height: 360px;
+    overflow-y: auto;
+}
+
+.notif-dropdown-footer {
+    border-top: 1px solid var(--border-color);
+}
diff --git a/routes/web.php b/routes/web.php
index 2113309..9af7e95 100755
--- a/routes/web.php
+++ b/routes/web.php
@@ -22,6 +22,7 @@ $router->get('/dashboard', [DashboardController::class, 'index'], [AuthMiddlewar
 $router->get('/dashboard/stats', [DashboardController::class, 'stats'], [AuthMiddleware::class]);
 $router->get('/dashboard/refresh-metrics', [DashboardController::class, 'refreshMetrics'], [AuthMiddleware::class]);
 $router->get('/dashboard/chart-data', [DashboardController::class, 'chartData'], [AuthMiddleware::class]);
+$router->get('/notifications', [DashboardController::class, 'notifications'], [AuthMiddleware::class]);
 
 $router->get('/login', [AuthController::class, 'loginForm']);
 $router->post('/login', [AuthController::class, 'login'], [CSRFMiddleware::class, RateLimitMiddleware::class]);
diff --git a/src/Controllers/DashboardController.php b/src/Controllers/DashboardController.php
index ac2d50b..1942e58 100755
--- a/src/Controllers/DashboardController.php
+++ b/src/Controllers/DashboardController.php
@@ -7,6 +7,7 @@ namespace ServerManager\Controllers;
 use ServerManager\Core\App;
 use ServerManager\Core\Session;
 use ServerManager\Models\Server;
+use ServerManager\Models\Notification;
 use ServerManager\Services\MonitoringService;
 use ServerManager\Services\AuditService;
 
@@ -80,4 +81,22 @@ class DashboardController
             'data' => $data,
         ]);
     }
+
+    public function notifications(): void
+    {
+        $userId = (int) Session::get('user_id');
+        $page = (int) ($_GET['page'] ?? 1);
+        $perPage = 20;
+
+        $notificationModel = new Notification();
+        $result = $notificationModel->getForUser($userId, $page, $perPage);
+        $unreadCount = $notificationModel->getUnreadCount($userId);
+
+        $this->view->display('notifications.index', [
+            'title' => 'Notifications - ServerManager',
+            'notifications' => $result['data'],
+            'pagination' => $result,
+            'unreadCount' => $unreadCount,
+        ]);
+    }
 }
diff --git a/views/layouts/main.php b/views/layouts/main.php
index 2a98ec8..598df63 100755
--- a/views/layouts/main.php
+++ b/views/layouts/main.php
@@ -40,6 +40,12 @@
                             <span>Dashboard</span>
                         </a>
                     </li>
+                    <li class="nav-item">
+                        <a href="/notifications" class="nav-link <?= str_starts_with($_SERVER['REQUEST_URI'] ?? '', '/notifications') ? 'active' : '' ?>">
+                            <i class="fas fa-bell"></i>
+                            <span>Notifications</span>
+                        </a>
+                    </li>
                     <li class="nav-item nav-item-accordion <?= str_starts_with($_SERVER['REQUEST_URI'] ?? '', '/servers') ? 'active' : '' ?>">
                         <a href="#" class="nav-link" onclick="toggleServerList(event)">
                             <i class="fas fa-hdd"></i>
@@ -151,6 +157,28 @@
                                 <i class="fas fa-bell"></i>
                                 <span class="notification-badge" id="notificationBadge" style="display:none">0</span>
                             </button>
+                            <div class="notification-dropdown" id="notifDropdown">
+                                <div class="notif-dropdown-header">
+                                    <span style="font-weight:600;font-size:0.9em">Notifications</span>
+                                    <div style="display:flex;align-items:center;gap:6px">
+                                        <button class="btn-text" id="markAllReadBtn" onclick="markAllRead()" style="display:none;font-size:0.78em;padding:2px 6px;border-radius:4px">
+                                            <i class="fas fa-check-double"></i> Mark all read
+                                        </button>
+                                        <button class="btn-text" onclick="closeNotifications()" style="font-size:0.78em;padding:2px 6px;border-radius:4px">&times;</button>
+                                    </div>
+                                </div>
+                                <div class="notif-dropdown-body" id="notifList">
+                                    <div style="padding:40px 20px;text-align:center;color:var(--text-muted)">
+                                        <i class="fas fa-spinner fa-spin" style="font-size:1.5em;margin-bottom:10px;display:block"></i>
+                                        <span>Loading notifications...</span>
+                                    </div>
+                                </div>
+                                <div class="notif-dropdown-footer">
+                                    <a href="/notifications" class="btn-text" style="font-size:0.82em;color:var(--info);width:100%;text-align:center;padding:8px;display:block">
+                                        <i class="fas fa-external-link-alt"></i> View all notifications
+                                    </a>
+                                </div>
+                            </div>
                         </div>
                     </div>
                 </div>
@@ -178,34 +206,6 @@
 
     <div id="toastContainer" class="toast-container"></div>
 
-    <div id="notificationModal" class="modal">
-        <div class="modal-dialog" style="max-width:480px">
-            <div class="modal-header">
-                <h3 style="font-size:1em;display:flex;align-items:center;gap:8px">
-                    <i class="fas fa-bell" style="color:var(--info)"></i> Notifications
-                    <span id="notifCountBadge" class="badge" style="display:none;font-size:0.75em">0</span>
-                </h3>
-                <div style="display:flex;align-items:center;gap:8px">
-                    <button class="btn btn-sm btn-text" id="markAllReadBtn" onclick="markAllRead()" style="display:none;font-size:0.82em">
-                        <i class="fas fa-check-double"></i> Mark all read
-                    </button>
-                    <button type="button" class="modal-close" onclick="closeNotifications()">&times;</button>
-                </div>
-            </div>
-            <div class="modal-body" style="padding:0;max-height:420px;overflow-y:auto" id="notifList">
-                <div style="padding:40px 20px;text-align:center;color:var(--text-muted)">
-                    <i class="fas fa-spinner fa-spin" style="font-size:1.5em;margin-bottom:10px;display:block"></i>
-                    <span>Loading notifications...</span>
-                </div>
-            </div>
-            <div class="modal-footer" style="justify-content:center;padding:0.7rem">
-                <a href="/admin/notifications" class="btn btn-sm btn-text" style="font-size:0.85em;color:var(--info)">
-                    <i class="fas fa-external-link-alt"></i> View all in admin panel
-                </a>
-            </div>
-        </div>
-    </div>
-
     <script src="/assets/js/app.js"></script>
     <?php if (isset($scripts)): ?>
         <?php foreach ($scripts as $script): ?>
@@ -220,8 +220,8 @@ function getApiToken() {
 }
 
 function toggleNotifications() {
-    const modal = document.getElementById('notificationModal');
-    if (modal.style.display === 'flex') {
+    const dd = document.getElementById('notifDropdown');
+    if (dd.classList.contains('open')) {
         closeNotifications();
     } else {
         openNotifications();
@@ -229,16 +229,23 @@ function toggleNotifications() {
 }
 
 function openNotifications() {
-    const modal = document.getElementById('notificationModal');
-    modal.style.display = 'flex';
-    modal.onclick = function(e) {
-        if (e.target === this) closeNotifications();
-    };
+    const dd = document.getElementById('notifDropdown');
+    dd.classList.add('open');
     fetchNotifications();
+    document.addEventListener('click', notifOutsideClick);
 }
 
 function closeNotifications() {
-    document.getElementById('notificationModal').style.display = 'none';
+    const dd = document.getElementById('notifDropdown');
+    dd.classList.remove('open');
+    document.removeEventListener('click', notifOutsideClick);
+}
+
+function notifOutsideClick(e) {
+    const wrapper = document.querySelector('.notification-btn-wrapper');
+    if (!wrapper.contains(e.target)) {
+        closeNotifications();
+    }
 }
 
 function fetchNotifications() {
@@ -351,15 +358,11 @@ function updateUnreadCount() {
         .then(d => {
             const count = d.unread_count || 0;
             const badge = document.getElementById('notificationBadge');
-            const notifCount = document.getElementById('notifCountBadge');
             if (count > 0) {
                 badge.textContent = count > 99 ? '99+' : count;
                 badge.style.display = 'inline-flex';
-                notifCount.textContent = count;
-                notifCount.style.display = 'inline-flex';
             } else {
                 badge.style.display = 'none';
-                notifCount.style.display = 'none';
             }
         })
         .catch(function(){});
diff --git a/views/notifications/index.php b/views/notifications/index.php
new file mode 100644
index 0000000..aac2fa8
--- /dev/null
+++ b/views/notifications/index.php
@@ -0,0 +1,91 @@
+<?php
+$notifications = $notifications ?? [];
+$pagination = $pagination ?? [];
+$unreadCount = $unreadCount ?? 0;
+$data = $notifications ?? [];
+?>
+
+<div class="page-header">
+    <div class="page-header-left">
+        <div class="back-link">
+            <a href="/dashboard"><i class="fas fa-arrow-left"></i> Back to Dashboard</a>
+        </div>
+        <h1 class="page-title">Notifications</h1>
+        <p class="page-subtitle">
+            <?= $unreadCount ?> unread &middot; <?= $pagination['total'] ?? 0 ?> total
+        </p>
+    </div>
+    <div class="page-header-right">
+        <?php if ($unreadCount > 0): ?>
+        <button class="btn btn-sm btn-text" onclick="markAllRead()" style="font-size:0.85em">
+            <i class="fas fa-check-double"></i> Mark all read
+        </button>
+        <?php endif; ?>
+    </div>
+</div>
+
+<div class="card">
+    <div class="card-body" style="padding:0">
+        <?php if (empty($data)): ?>
+        <div style="padding:60px 20px;text-align:center;color:var(--text-muted)">
+            <i class="fas fa-check-circle" style="font-size:2.5em;margin-bottom:12px;display:block;color:var(--success)"></i>
+            <p style="font-size:1.05em">All caught up!</p>
+            <p style="font-size:0.9em">No notifications to show.</p>
+        </div>
+        <?php else: ?>
+            <?php foreach ($data as $n): ?>
+            <?php
+                $typeColors = ['error' => 'danger', 'warning' => 'warning', 'info' => 'info'];
+                $icons = ['error' => 'fa-times-circle', 'warning' => 'fa-exclamation-triangle', 'info' => 'fa-info-circle'];
+                $tc = $typeColors[$n['type']] ?? 'info';
+                $icon = $icons[$n['type']] ?? 'fa-info-circle';
+                $isRead = !empty($n['is_read']);
+            ?>
+            <div class="notif-item <?= $isRead ? 'notif-read' : 'notif-unread' ?>" data-id="<?= $n['id'] ?>">
+                <div class="notif-icon notif-<?= $tc ?>"><i class="fas <?= $icon ?>"></i></div>
+                <div class="notif-content">
+                    <div class="notif-title"><?= htmlspecialchars($n['title'] ?? '') ?></div>
+                    <div class="notif-message"><?= htmlspecialchars($n['message'] ?? '') ?></div>
+                    <div class="notif-time"><?= time_ago($n['created_at'] ?? '') ?></div>
+                </div>
+                <?php if (!$isRead): ?>
+                <div class="notif-dot"></div>
+                <?php endif; ?>
+            </div>
+            <?php endforeach; ?>
+        <?php endif; ?>
+    </div>
+</div>
+
+<?php if (($pagination['total_pages'] ?? 1) > 1): ?>
+<div class="pagination">
+    <?php for ($i = 1; $i <= $pagination['total_pages']; $i++): ?>
+    <a href="/notifications?page=<?= $i ?>" class="btn btn-sm <?= ($pagination['page'] ?? 1) === $i ? 'btn-primary' : 'btn-secondary' ?>">
+        <?= $i ?>
+    </a>
+    <?php endfor; ?>
+</div>
+<?php endif; ?>
+
+<script>
+function markAllRead() {
+    const token = document.querySelector('meta[name="api-token"]')?.getAttribute('content') || '';
+    const headers = { 'Accept': 'application/json' };
+    if (token) headers['Authorization'] = 'Bearer ' + token;
+
+    fetch('/api/notifications/read-all', { method: 'POST', headers })
+        .then(r => r.json())
+        .then(d => {
+            if (d.success) {
+                document.querySelectorAll('.notif-item').forEach(function(el) {
+                    el.classList.remove('notif-unread');
+                    el.classList.add('notif-read');
+                    const dot = el.querySelector('.notif-dot');
+                    if (dot) dot.remove();
+                });
+                location.reload();
+            }
+        })
+        .catch(function(){});
+}
+</script>