:root {
            --primary-color: #2D3748;
            --secondary-color: #4A5568;
            --accent-color: #DC2626;
            --accent-light: #FEF2F2;
            --success-color: #10B981;
            --warning-color: #F59E0B;
            --danger-color: #EF4444;
            --text-primary: #1F2937;
            --text-secondary: #6B7280;
            --text-light: #9CA3AF;
            --background-light: #F9FAFB;
            --background-white: #FFFFFF;
            --border-color: #E5E7EB;
            --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background: var(--background-light);
            color: var(--text-primary);
            overflow: hidden;
        }

        /* Admin Panel Container */
        .admin-panel {
            width: 100vw;
            height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* Header */
        .admin-header {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: white;
            padding: 1rem 2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: var(--shadow-lg);
            z-index: 10;
        }

        .admin-header h1 {
            display: flex;
            align-items: center;
            gap: 1rem;
            font-size: 1.5rem;
            font-weight: 900;
        }

       

        .header-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .user-info {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            opacity: 0.9;
        }

        .logout-btn {
            background: rgba(255, 255, 255, 0.1);
            border: none;
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .logout-btn:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-1px);
        }

        /* Main Content */
        .admin-content {
            display: flex;
            height: calc(100vh - 80px);
            overflow: hidden;
        }

        /* Sidebar */
        .admin-sidebar {
            width: 280px;
            background: white;
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow);
        }

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

        .nav-item {
            display: block;
            padding: 1rem 1.5rem;
            color: var(--text-secondary);
            text-decoration: none;
            border-left: 3px solid transparent;
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .nav-item:hover {
            background: var(--background-light);
            color: var(--text-primary);
            border-left-color: var(--accent-color);
        }

        .nav-item.active {
            background: var(--accent-light);
            color: var(--accent-color);
            border-left-color: var(--accent-color);
            font-weight: 600;
        }

        .nav-item i {
            width: 20px;
            margin-right: 0.75rem;
        }

        /* Content Area */
        .admin-body {
            flex: 1;
            background: var(--background-light);
            overflow-y: auto;
            padding: 2rem;
        }

        .content-section {
            display: none;
            max-width: 1200px;
            margin: 0 auto;
        }

        .content-section.active {
            display: block;
            animation: fadeIn 0.3s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .page-header {
            margin-bottom: 2rem;
        }

        .page-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }

        .page-subtitle {
            color: var(--text-secondary);
            font-size: 1.1rem;
        }

        /* Cards */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .stat-card {
            background: white;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
            border-left: 4px solid var(--accent-color);
        }

        .stat-card h3 {
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            margin-bottom: 0.5rem;
        }

        .stat-card .number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
        }

        .stat-card .change {
            font-size: 0.8rem;
            margin-top: 0.5rem;
        }

        .change.positive { color: var(--success-color); }
        .change.negative { color: var(--danger-color); }

        /* Forms */
        .form-card {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }

        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
        }

        .form-group {
            display: flex;
            flex-direction: column;
        }

        .form-group label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }

        .required {
            color: var(--danger-color);
        }

        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            transition: all 0.3s ease;
            background: white;
        }

        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--accent-color);
            box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
        }

        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }

        /* Buttons */
        .btn {
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            text-decoration: none;
        }

        .btn-primary {
            background: var(--accent-color);
            color: white;
        }

        .btn-primary:hover {
            background: #B91C1C;
            transform: translateY(-1px);
            box-shadow: var(--shadow);
        }

        .btn-secondary {
            background: var(--background-light);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
        }

        .btn-secondary:hover {
            background: white;
            color: var(--text-primary);
        }

        .btn-danger {
            background: var(--danger-color);
            color: white;
        }

        .btn-danger:hover {
            background: #DC2626;
        }

        .btn-sm {
            padding: 0.5rem 1rem;
            font-size: 0.9rem;
        }

        /* Tables */
        .table-container {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }

        .table {
            width: 100%;
            border-collapse: collapse;
        }

        .table th {
            background: var(--primary-color);
            color: white;
            padding: 1rem;
            text-align: left;
            font-weight: 600;
            font-size: 0.9rem;
        }

        .table td {
            padding: 1rem;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-secondary);
        }

        .table tbody tr:hover {
            background: var(--background-light);
        }

        .table tbody tr:last-child td {
            border-bottom: none;
        }

        /* Office List */
        .office-grid {
            display: grid;
            gap: 1.5rem;
        }

        .office-item {
            background: white;
            border-radius: 12px;
            padding: 1.5rem;
            box-shadow: var(--shadow);
            display: flex;
            align-items: center;
            gap: 1rem;
            transition: all 0.3s ease;
        }

        .office-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        .office-thumbnail {
            width: 80px;
            height: 60px;
            background: var(--accent-color);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
            flex-shrink: 0;
        }

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

        .office-info {
            flex: 1;
        }

        .office-info h4 {
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }

        .office-info p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.5;
        }

        .office-actions {
            display: flex;
            gap: 0.5rem;
        }

        .action-btn {
            width: 40px;
            height: 40px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }

        .action-btn.edit {
            background: var(--accent-color);
            color: white;
        }

        .action-btn.edit:hover {
            background: #B91C1C;
            transform: translateY(-1px);
        }

        .action-btn.delete {
            background: var(--danger-color);
            color: white;
        }

        .action-btn.delete:hover {
            background: #DC2626;
            transform: translateY(-1px);
        }

        /* Notification */
        .notification {
            position: fixed;
            top: 100px;
            right: 20px;
            background: var(--success-color);
            color: white;
            padding: 1rem 1.5rem;
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
            transform: translateX(400px);
            transition: transform 0.3s ease;
            z-index: 1000;
        }

        .notification.show {
            transform: translateX(0);
        }

        .notification.error {
            background: var(--danger-color);
        }

        .notification.info {
            background: #3B82F6;
        }

        .notification.warning {
            background: var(--warning-color);
        }

        /* Empty State */
        .empty-state {
            text-align: center;
            padding: 3rem;
            color: var(--text-secondary);
        }

        .empty-state i {
            font-size: 3rem;
            margin-bottom: 1rem;
            opacity: 0.5;
        }

        .empty-state h3 {
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .admin-content {
                flex-direction: column;
            }
            
            .admin-sidebar {
                width: 100%;
                height: auto;
                order: 2;
            }
            
            .sidebar-nav {
                display: flex;
                overflow-x: auto;
                padding: 0;
            }
            
            .nav-item {
                flex-shrink: 0;
                border-left: none;
                border-bottom: 3px solid transparent;
            }
            
            .nav-item.active {
                border-left: none;
                border-bottom-color: var(--accent-color);
            }
            
            .admin-body {
                padding: 1rem;
                order: 1;
            }
            
            .form-grid {
                grid-template-columns: 1fr;
            }
            
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Login Screen */
        .login-screen {
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            position: relative;
            overflow: hidden;
        }

        .login-screen::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
            opacity: 0.3;
        }

        .login-form {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            border-radius: 20px;
            padding: 3rem;
            box-shadow: var(--shadow-xl);
            border: 1px solid rgba(255, 255, 255, 0.2);
            max-width: 450px;
            width: 90%;
            position: relative;
            z-index: 1;
        }

        .login-form h2 {
            text-align: center;
            color: var(--primary-color);
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.75rem;
        }

        .login-form p {
            text-align: center;
            color: var(--text-secondary);
            margin-bottom: 2rem;
        }

        .login-form .form-group {
            margin-bottom: 1.5rem;
        }

        .login-form .btn-primary {
            width: 100%;
            padding: 1rem;
        }