diff --git a/.playwright-mcp/back-to-light-theme.png b/.playwright-mcp/back-to-light-theme.png
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diff --git a/.playwright-mcp/current-theme-light.png b/.playwright-mcp/current-theme-light.png
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index 0000000..8e786bb
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diff --git a/.playwright-mcp/dark-theme-dashboard.png b/.playwright-mcp/dark-theme-dashboard.png
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index 0000000..8518e0f
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diff --git a/.playwright-mcp/dark-theme-fixed.png b/.playwright-mcp/dark-theme-fixed.png
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index 0000000..a81a600
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diff --git a/.playwright-mcp/dark-theme-issues.png b/.playwright-mcp/dark-theme-issues.png
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index 0000000..5eba3e6
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diff --git a/.playwright-mcp/desktop-view-light.png b/.playwright-mcp/desktop-view-light.png
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index 0000000..94a77ee
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diff --git a/.playwright-mcp/light-theme-with-toggle.png b/.playwright-mcp/light-theme-with-toggle.png
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index 0000000..209f06a
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diff --git a/.playwright-mcp/tema-claro-final.png b/.playwright-mcp/tema-claro-final.png
new file mode 100644
index 0000000..10e6ce9
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diff --git a/.playwright-mcp/tema-corregido-final.png b/.playwright-mcp/tema-corregido-final.png
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diff --git a/src/app.py b/src/app.py
index e1d426c..39cc340 100644
--- a/src/app.py
+++ b/src/app.py
@@ -30,6 +30,9 @@ from routes import register_api_routes, register_web_routes
 # Crear instancia Flask
 app = Flask(__name__, template_folder="../templates", static_folder="../static")
 
+# Configuración para desarrollo - habilitar recarga de templates
+app.config["TEMPLATES_AUTO_RELOAD"] = True
+
 
 class AutoBackupsFlaskApp:
     """Aplicación principal de AutoBackups con Flask"""
diff --git a/static/css/styles.css b/static/css/styles.css
index 08e0e14..9c2bfcd 100644
--- a/static/css/styles.css
+++ b/static/css/styles.css
@@ -7,12 +7,41 @@
     --warning-color: #ffc107;
     --danger-color: #dc3545;
     --dark-color: #212529;
+    
+    /* Light theme colors */
+    --bg-color: #f8f9fa;
+    --surface-color: #ffffff;
+    --text-color: #212529;
+    --text-muted: #6c757d;
+    --border-color: #dee2e6;
+    --hover-bg: rgba(0, 0, 0, 0.025);
+    --shadow-color: rgba(0, 0, 0, 0.075);
+    --shadow-hover: rgba(0, 0, 0, 0.15);
+}
+
+/* Dark theme colors */
+[data-theme="dark"] {
+    --bg-color: #1a1a1a;
+    --surface-color: #2d2d2d;
+    --text-color: #e9ecef;
+    --text-muted: #adb5bd;
+    --border-color: #495057;
+    --hover-bg: rgba(255, 255, 255, 0.1);
+    --shadow-color: rgba(0, 0, 0, 0.25);
+    --shadow-hover: rgba(0, 0, 0, 0.35);
+    --primary-color: #4dabf7;
+    --success-color: #51cf66;
+    --info-color: #22b8cf;
+    --warning-color: #ffd43b;
+    --danger-color: #ff6b6b;
 }
 
 /* General Styles */
 body {
-    background-color: #f8f9fa;
+    background-color: var(--bg-color);
+    color: var(--text-color);
     font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+    transition: background-color 0.3s ease, color 0.3s ease;
 }
 
 .navbar-brand {
@@ -20,22 +49,40 @@ body {
     font-size: 1.5rem;
 }
 
+/* Theme Toggle */
+.theme-toggle {
+    background: none;
+    border: none;
+    color: rgba(255, 255, 255, 0.75);
+    font-size: 1.2rem;
+    padding: 0.375rem 0.75rem;
+    border-radius: 0.375rem;
+    transition: color 0.3s ease, background-color 0.3s ease;
+}
+
+.theme-toggle:hover {
+    color: rgba(255, 255, 255, 0.9);
+    background-color: rgba(255, 255, 255, 0.1);
+}
+
 /* Cards */
 .card {
     border: none;
     border-radius: 0.5rem;
-    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
-    transition: box-shadow 0.15s ease-in-out;
+    background-color: var(--surface-color);
+    box-shadow: 0 0.125rem 0.25rem var(--shadow-color);
+    transition: box-shadow 0.15s ease-in-out, background-color 0.3s ease;
 }
 
 .card:hover {
-    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
+    box-shadow: 0 0.5rem 1rem var(--shadow-hover);
 }
 
 .card-header {
-    background-color: #fff;
-    border-bottom: 1px solid #dee2e6;
+    background-color: var(--surface-color);
+    border-bottom: 1px solid var(--border-color);
     font-weight: 600;
+    color: var(--text-color);
 }
 
 /* Statistics Cards */
@@ -65,11 +112,12 @@ body {
 
 /* Tables */
 .table {
-    background-color: #fff;
+    background-color: var(--surface-color);
+    color: var(--text-color);
 }
 
 .table-hover tbody tr:hover {
-    background-color: rgba(0, 0, 0, 0.025);
+    background-color: var(--hover-bg);
 }
 
 .table th {
@@ -78,11 +126,14 @@ body {
     font-size: 0.9rem;
     text-transform: uppercase;
     letter-spacing: 0.5px;
+    color: var(--text-color);
+    border-bottom: 1px solid var(--border-color);
 }
 
 .table td {
     vertical-align: middle;
-    border-color: #dee2e6;
+    border-color: var(--border-color);
+    color: var(--text-color);
 }
 
 /* Badges */
@@ -118,11 +169,13 @@ body {
 .modal-content {
     border: none;
     border-radius: 0.5rem;
-    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
+    background-color: var(--surface-color);
+    color: var(--text-color);
+    box-shadow: 0 0.5rem 1rem var(--shadow-hover);
 }
 
 .modal-header {
-    border-bottom: 1px solid #dee2e6;
+    border-bottom: 1px solid var(--border-color);
     padding: 1.5rem;
 }
 
@@ -131,7 +184,7 @@ body {
 }
 
 .modal-footer {
-    border-top: 1px solid #dee2e6;
+    border-top: 1px solid var(--border-color);
     padding: 1rem 1.5rem;
 }
 
@@ -139,13 +192,23 @@ body {
 .form-control,
 .form-select {
     border-radius: 0.375rem;
-    border: 1px solid #ced4da;
+    border: 1px solid var(--border-color);
+    background-color: var(--surface-color);
+    color: var(--text-color);
 }
 
 .form-control:focus,
 .form-select:focus {
     border-color: var(--primary-color);
     box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
+    background-color: var(--surface-color);
+    color: var(--text-color);
+}
+
+/* Dark theme form controls */
+[data-theme="dark"] .form-control:focus,
+[data-theme="dark"] .form-select:focus {
+    box-shadow: 0 0 0 0.2rem rgba(77, 171, 247, 0.25);
 }
 
 /* Loading States */
@@ -219,7 +282,7 @@ body {
 /* Custom Scrollbar */
 .custom-scrollbar {
     scrollbar-width: thin;
-    scrollbar-color: #ced4da #f8f9fa;
+    scrollbar-color: var(--border-color) var(--bg-color);
 }
 
 .custom-scrollbar::-webkit-scrollbar {
@@ -227,15 +290,175 @@ body {
 }
 
 .custom-scrollbar::-webkit-scrollbar-track {
-    background: #f8f9fa;
+    background: var(--bg-color);
     border-radius: 4px;
 }
 
 .custom-scrollbar::-webkit-scrollbar-thumb {
-    background: #ced4da;
+    background: var(--border-color);
     border-radius: 4px;
 }
 
 .custom-scrollbar::-webkit-scrollbar-thumb:hover {
-    background: #adb5bd;
+    background: var(--text-muted);
+}
+
+/* Dark theme specific overrides */
+[data-theme="dark"] .navbar-dark {
+    background-color: #1e2329 !important;
+}
+
+[data-theme="dark"] .btn-outline-primary {
+    border-color: var(--primary-color);
+    color: var(--primary-color);
+}
+
+[data-theme="dark"] .btn-outline-primary:hover {
+    background-color: var(--primary-color);
+    border-color: var(--primary-color);
+}
+
+[data-theme="dark"] .alert {
+    border: 1px solid var(--border-color);
+}
+
+[data-theme="dark"] .dropdown-menu {
+    background-color: var(--surface-color);
+    border: 1px solid var(--border-color);
+}
+
+[data-theme="dark"] .dropdown-item {
+    color: var(--text-color);
+}
+
+[data-theme="dark"] .dropdown-item:hover {
+    background-color: var(--hover-bg);
+    color: var(--text-color);
+}
+
+[data-theme="dark"] .text-muted {
+    color: var(--text-muted) !important;
+}
+
+/* Dark theme table specific fixes */
+[data-theme="dark"] .table {
+    background-color: var(--surface-color);
+    color: var(--text-color);
+}
+
+[data-theme="dark"] .table td {
+    background-color: var(--surface-color);
+    color: var(--text-color);
+    border-color: var(--border-color);
+}
+
+[data-theme="dark"] .table th {
+    background-color: var(--surface-color);
+    color: var(--text-color);
+    border-color: var(--border-color);
+}
+
+[data-theme="dark"] .table tbody tr {
+    background-color: var(--surface-color);
+}
+
+[data-theme="dark"] .table-hover tbody tr:hover {
+    background-color: var(--hover-bg);
+}
+
+[data-theme="dark"] .table-hover tbody tr:hover td {
+    background-color: var(--hover-bg);
+}
+
+/* Fix for Bootstrap table striped rows in dark theme */
+[data-theme="dark"] .table-striped tbody tr:nth-of-type(odd) {
+    background-color: rgba(255, 255, 255, 0.05);
+}
+
+[data-theme="dark"] .table-striped tbody tr:nth-of-type(odd) td {
+    background-color: rgba(255, 255, 255, 0.05);
+}
+
+/* Dark theme card fixes */
+[data-theme="dark"] .card {
+    background-color: var(--surface-color);
+    border: 1px solid var(--border-color);
+}
+
+[data-theme="dark"] .card-body {
+    background-color: var(--surface-color);
+    color: var(--text-color);
+}
+
+[data-theme="dark"] .card-header {
+    background-color: var(--surface-color);
+    border-bottom: 1px solid var(--border-color);
+    color: var(--text-color);
+}
+
+/* Dark theme input group fixes */
+[data-theme="dark"] .input-group-text {
+    background-color: var(--surface-color);
+    border: 1px solid var(--border-color);
+    color: var(--text-color);
+}
+
+/* Dark theme pagination fixes */
+[data-theme="dark"] .page-link {
+    background-color: var(--surface-color);
+    border: 1px solid var(--border-color);
+    color: var(--text-color);
+}
+
+[data-theme="dark"] .page-link:hover {
+    background-color: var(--hover-bg);
+    color: var(--text-color);
+}
+
+[data-theme="dark"] .page-item.active .page-link {
+    background-color: var(--primary-color);
+    border-color: var(--primary-color);
+}
+
+/* Dark theme accordion fixes */
+[data-theme="dark"] .accordion-item {
+    background-color: var(--surface-color);
+    border: 1px solid var(--border-color);
+}
+
+[data-theme="dark"] .accordion-button {
+    background-color: var(--surface-color);
+    color: var(--text-color);
+}
+
+[data-theme="dark"] .accordion-button:not(.collapsed) {
+    background-color: var(--hover-bg);
+    color: var(--text-color);
+}
+
+[data-theme="dark"] .accordion-body {
+    background-color: var(--surface-color);
+    color: var(--text-color);
+}
+
+/* Fix for list-group items in dark theme */
+[data-theme="dark"] .list-group-item {
+    background-color: var(--surface-color) !important;
+    border-color: var(--border-color) !important;
+    color: var(--text-color) !important;
+}
+
+/* Fix for table-dark header in light theme */
+[data-theme="light"] .table-dark th,
+:root:not([data-theme="dark"]) .table-dark th {
+    background-color: #343a40 !important;
+    color: white !important;
+    border-color: #495057 !important;
+}
+
+/* Ensure table-dark works correctly in both themes */
+[data-theme="dark"] .table-dark th {
+    background-color: #495057 !important;
+    color: white !important;
+    border-color: #6c757d !important;
 }
diff --git a/static/js/app.js b/static/js/app.js
index 64b100f..d92e965 100644
--- a/static/js/app.js
+++ b/static/js/app.js
@@ -6,6 +6,7 @@ class AutoBackupsApp {
     }
 
     init() {
+        this.initializeTheme();
         this.updateCurrentTime();
         this.setupEventListeners();
         
@@ -29,7 +30,45 @@ class AutoBackupsApp {
         }
     }
 
+    // Theme Management
+    initializeTheme() {
+        // Load saved theme from localStorage or default to light
+        const savedTheme = localStorage.getItem('theme') || 'light';
+        this.setTheme(savedTheme);
+    }
+
+    setTheme(theme) {
+        const htmlElement = document.documentElement;
+        const themeIcon = document.getElementById('theme-icon');
+        
+        if (theme === 'dark') {
+            htmlElement.setAttribute('data-theme', 'dark');
+            if (themeIcon) {
+                themeIcon.className = 'bi bi-moon-fill';
+            }
+        } else {
+            htmlElement.removeAttribute('data-theme');
+            if (themeIcon) {
+                themeIcon.className = 'bi bi-sun-fill';
+            }
+        }
+        
+        localStorage.setItem('theme', theme);
+    }
+
+    toggleTheme() {
+        const currentTheme = document.documentElement.getAttribute('data-theme');
+        const newTheme = currentTheme === 'dark' ? 'light' : 'dark';
+        this.setTheme(newTheme);
+    }
+
     setupEventListeners() {
+        // Theme toggle button
+        const themeToggleBtn = document.getElementById('theme-toggle');
+        if (themeToggleBtn) {
+            themeToggleBtn.addEventListener('click', () => this.toggleTheme());
+        }
+
         // Global backup all button
         const backupAllBtn = document.getElementById('backup-all-btn');
         if (backupAllBtn) {
diff --git a/templates/base.html b/templates/base.html
index 5fd1a4c..092700a 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -50,9 +50,15 @@
                         </a>
                     </li>
                 </ul>
-                <span class="navbar-text">
-                    <i class="bi bi-clock"></i> <span id="current-time"></span>
-                </span>
+                <div class="d-flex align-items-center">
+                    <!-- Theme Toggle -->
+                    <button type="button" class="theme-toggle me-3" id="theme-toggle" title="Toggle Theme">
+                        <i class="bi bi-sun-fill" id="theme-icon"></i>
+                    </button>
+                    <span class="navbar-text">
+                        <i class="bi bi-clock"></i> <span id="current-time"></span>
+                    </span>
+                </div>
             </div>
         </div>
     </nav>