/* Reset and Base Styles */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --secondary-gradient: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
            --card-gradient: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
            --shadow-light: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
            --shadow-heavy: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
            --text-primary: #1a202c;
            --text-secondary: #4a5568;
            --text-muted: #718096;
            --border-light: #e2e8f0;
            --bg-primary: #f7fafc;
            --bg-white: #ffffff;
            --accent-blue: #4299e1;
            --accent-purple: #9f7aea;
            --accent-green: #48bb78;
            --accent-orange: #ed8936;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
        }

        /* Layout */
        .dashboard-container {
            display: flex;
            min-height: 100vh;
        }

        /* Sidebar */
        .sidebar {
            width: 280px;
            background: var(--bg-white);
            box-shadow: var(--shadow-medium);
            position: fixed;
            height: 100vh;
            overflow-y: auto;
            z-index: 1000;
            transition: var(--transition);
        }

        .sidebar-header {
            padding: 2rem 1.5rem;
            background: var(--primary-gradient);
            color: white;
            text-align: center;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .logo-subtitle {
            font-size: 0.875rem;
            opacity: 0.8;
        }

        .nav-menu {
            padding: 1rem 0;
        }

        .nav-item {
            display: flex;
            align-items: center;
            padding: 0.75rem 1.5rem;
            color: var(--text-secondary);
            text-decoration: none;
            transition: var(--transition);
            border-left: 3px solid transparent;
            cursor: pointer;
        }

        .nav-item:hover {
            background: var(--bg-primary);
            border-left-color: var(--accent-blue);
            color: var(--text-primary);
            transform: translateX(4px);
        }

        .nav-item.active {
            background: var(--primary-gradient);
            color: white;
            border-left-color: white;
        }

        .nav-icon {
            width: 20px;
            height: 20px;
            margin-right: 0.75rem;
            opacity: 0.7;
        }

        /* Main Content */
        .main-content {
            flex: 1;
            margin-left: 280px;
            padding: 2rem;
            transition: var(--transition);
        }

        .header {
            background: var(--card-gradient);
            border-radius: 12px;
            padding: 1.5rem 2rem;
            box-shadow: var(--shadow-light);
            margin-bottom: 2rem;
            border: 1px solid var(--border-light);
        }

        .header h1 {
            font-size: 2rem;
            font-weight: 600;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 0.5rem;
        }

        .header p {
            color: var(--text-secondary);
        }

        /* Content Sections */
        .content-section {
            display: none;
            animation: fadeIn 0.5s ease-out;
        }

        .content-section.active {
            display: block;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .card {
            background: var(--card-gradient);
            border-radius: 16px;
            padding: 2rem;
            box-shadow: var(--shadow-light);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            margin-bottom: 2rem;
        }

        .card:hover {
            box-shadow: var(--shadow-medium);
            transform: translateY(-2px);
        }

        .card-header {
            display: flex;
            justify-content: between;
            align-items: center;
            margin-bottom: 1.5rem;
            padding-bottom: 1rem;
            border-bottom: 2px solid var(--border-light);
        }

        .card-title {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        /* Forms */
        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: var(--text-primary);
        }

        .form-input, .form-textarea, .form-select {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 2px solid var(--border-light);
            border-radius: 8px;
            font-size: 0.875rem;
            transition: var(--transition);
            background: var(--bg-white);
        }

        .form-input:focus, .form-textarea:focus, .form-select:focus {
            outline: none;
            border-color: var(--accent-blue);
            box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.1);
        }

        .form-textarea {
            resize: vertical;
            min-height: 120px;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            padding: 0.75rem 1.5rem;
            font-size: 0.875rem;
            font-weight: 500;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }

        .btn-primary {
            background: var(--primary-gradient);
            color: white;
            box-shadow: var(--shadow-light);
        }

        .btn-primary:hover {
            transform: translateY(-1px);
            box-shadow: var(--shadow-medium);
        }

        .btn-secondary {
            background: var(--bg-white);
            color: var(--text-primary);
            border: 2px solid var(--border-light);
        }

        .btn-secondary:hover {
            border-color: var(--accent-blue);
            color: var(--accent-blue);
        }

        .btn-success {
            background: linear-gradient(135deg, #48bb78, #38a169);
            color: white;
        }

        .btn-danger {
            background: linear-gradient(135deg, #f56565, #e53e3e);
            color: white;
        }

        /* Media Management */
        .media-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1rem;
            margin-top: 1rem;
        }

        .media-item {
            background: var(--bg-white);
            border-radius: 12px;
            padding: 1rem;
            border: 2px solid var(--border-light);
            transition: var(--transition);
            cursor: pointer;
        }

        .media-item:hover {
            border-color: var(--accent-blue);
            box-shadow: var(--shadow-light);
            transform: translateY(-2px);
        }

        .media-preview {
            width: 100%;
            height: 120px;
            background: var(--bg-primary);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 0.5rem;
            overflow: hidden;
        }

        .media-preview img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 8px;
        }

        .upload-zone {
            border: 2px dashed var(--border-light);
            border-radius: 12px;
            padding: 3rem 2rem;
            text-align: center;
            background: var(--bg-white);
            transition: var(--transition);
            cursor: pointer;
            margin-bottom: 2rem;
        }

        .upload-zone:hover {
            border-color: var(--accent-blue);
            background: #f0f8ff;
        }

        .upload-zone.dragover {
            border-color: var(--accent-green);
            background: #f0fff4;
        }

        /* Dashboard Stats - Enhanced */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .stat-card {
            background: var(--card-gradient);
            padding: 2rem;
            border-radius: 16px;
            box-shadow: var(--shadow-light);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .stat-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-medium);
        }

        .stat-card-icon {
            width: 56px;
            height: 56px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .stat-content {
            flex: 1;
        }

        .stat-label {
            color: var(--text-secondary);
            font-size: 0.875rem;
            margin-bottom: 0.25rem;
        }

        .stat-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.25rem;
        }

        .stat-change {
            font-size: 0.75rem;
            padding: 0.25rem 0.5rem;
            border-radius: 6px;
            font-weight: 500;
            display: inline-block;
        }

        .stat-change.positive {
            background: #dcfce7;
            color: #166534;
        }

        .stat-change.negative {
            background: #fecaca;
            color: #991b1b;
        }

        .stat-change.neutral {
            background: var(--bg-primary);
            color: var(--text-secondary);
        }

        /* Quick Actions */
        .quick-actions {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .quick-action-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 1rem;
            border-radius: 12px;
            border: 1px solid var(--border-light);
            background: var(--bg-white);
            transition: var(--transition);
            cursor: pointer;
        }

        .quick-action-item:hover {
            border-color: var(--accent-blue);
            box-shadow: var(--shadow-light);
            transform: translateX(4px);
        }

        .quick-action-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .quick-action-content {
            flex: 1;
        }

        .quick-action-title {
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.25rem;
        }

        .quick-action-desc {
            font-size: 0.875rem;
            color: var(--text-secondary);
        }

        /* Activity List - Enhanced */
        .activity-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .activity-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 1rem;
            border-radius: 12px;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .activity-item:hover {
            border-color: var(--accent-blue);
            box-shadow: var(--shadow-light);
        }

        .activity-icon {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .activity-content {
            flex: 1;
        }

        .activity-title {
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.25rem;
        }

        .activity-desc {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-bottom: 0.25rem;
        }

        .activity-time {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* Welcome Banner */
        .welcome-banner {
            background: var(--primary-gradient);
            border-radius: 16px;
            padding: 2rem;
            color: white;
            margin-top: 2rem;
        }

        .welcome-content {
            display: flex;
            align-items: center;
            gap: 1.5rem;
        }

        .welcome-icon {
            width: 64px;
            height: 64px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        /* Content Editor */
        .editor-toolbar {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
            padding: 1rem;
            background: var(--bg-primary);
            border-radius: 8px;
            border: 1px solid var(--border-light);
        }

        .editor-btn {
            padding: 0.5rem;
            border: 1px solid var(--border-light);
            background: var(--bg-white);
            border-radius: 4px;
            cursor: pointer;
            transition: var(--transition);
        }

        .editor-btn:hover {
            background: var(--accent-blue);
            color: white;
        }

        /* Live Preview */
        .preview-area {
            background: var(--bg-white);
            border: 2px solid var(--border-light);
            border-radius: 12px;
            padding: 2rem;
            min-height: 300px;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
                width: 100%;
            }

            .sidebar.mobile-open {
                transform: translateX(0);
            }

            .main-content {
                margin-left: 0;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .media-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* Loading States */
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 2px solid #f3f3f3;
            border-top: 2px solid var(--accent-blue);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        /* Success/Error Messages */
        .alert {
            padding: 1rem 1.5rem;
            border-radius: 8px;
            margin-bottom: 1rem;
            display: none;
        }

        .alert-success {
            background: #f0fff4;
            border: 1px solid #9ae6b4;
            color: #22543d;
        }

        .alert-error {
            background: #fed7d7;
            border: 1px solid #feb2b2;
            color: #742a2a;
        }

        .alert.show {
            display: block;
            animation: slideDown 0.3s ease-out;
        }

        @keyframes slideDown {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }