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

        :root {
            --primary-blue: #3b82f6;
            --primary-dark: #2563eb;
            --bg-primary: #ffffff;
            --bg-secondary: #f8fafc;
            --text-primary: #1e293b;
            --text-secondary: #64748b;
            --border-color: #e2e8f0;
            --success: #10b981;
            --danger: #ef4444;
            --warning: #f59e0b;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            padding: 2rem;
            color: var(--text-primary);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .header {
            text-align: center;
            margin-bottom: 3rem;
            color: white;
        }

        .header h1 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            text-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }

        .header p {
            font-size: 1.1rem;
            opacity: 0.9;
        }

        .main-card {
            background: var(--bg-primary);
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
            overflow: hidden;
        }

        .toolbar {
            background: var(--bg-secondary);
            padding: 1.5rem 2rem;
            border-bottom: 2px solid var(--border-color);
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            align-items: center;
        }

        .search-box {
            flex: 1;
            min-width: 250px;
            position: relative;
        }

        .search-box input {
            width: 100%;
            padding: 0.75rem 1rem 0.75rem 2.5rem;
            border: 2px solid var(--border-color);
            border-radius: 10px;
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        .search-box input:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
        }

        .search-box i {
            position: absolute;
            left: 0.75rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-secondary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: 10px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
        }

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

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

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

        .contacts-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
            padding: 2rem;
        }

        .contact-card {
            background: var(--bg-primary);
            border: 2px solid var(--border-color);
            border-radius: 12px;
            padding: 1.5rem;
            transition: all 0.3s ease;
            animation: fadeInUp 0.5s ease;
        }

        .contact-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.1);
            border-color: var(--primary-blue);
        }

        .contact-header {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 2px solid var(--bg-secondary);
        }

        .contact-avatar {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
            font-weight: 700;
            text-transform: uppercase;
        }

        .contact-info h3 {
            font-size: 1.2rem;
            color: var(--text-primary);
            margin-bottom: 0.25rem;
        }

        .contact-info p {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .contact-details {
            margin-bottom: 1rem;
        }

        .contact-detail {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 0.75rem;
            color: var(--text-secondary);
        }

        .contact-detail i {
            color: var(--primary-blue);
        }

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

        .contact-actions .btn {
            flex: 1;
            justify-content: center;
            padding: 0.5rem 1rem;
            font-size: 0.85rem;
        }

        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.7);
            z-index: 1000;
            align-items: center;
            justify-content: center;
            animation: fadeIn 0.3s ease;
        }

        .modal.active {
            display: flex;
        }

        .modal-content {
            background: var(--bg-primary);
            border-radius: 20px;
            padding: 2rem;
            max-width: 500px;
            width: 90%;
            max-height: 90vh;
            overflow-y: auto;
            animation: slideIn 0.3s ease;
        }

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

        .modal-header h2 {
            color: var(--text-primary);
            font-size: 1.5rem;
        }

        .modal-close {
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-secondary);
            transition: color 0.3s ease;
        }

        .modal-close:hover {
            color: var(--danger);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 0.75rem;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            font-family: inherit;
            transition: all 0.3s ease;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
        }

        .form-group textarea {
            resize: vertical;
            min-height: 80px;
        }

        .modal-actions {
            display: flex;
            gap: 1rem;
            margin-top: 2rem;
        }

        .modal-actions .btn {
            flex: 1;
            justify-content: center;
        }

        .empty-state {
            text-align: center;
            padding: 4rem 2rem;
            color: var(--text-secondary);
        }

        .empty-state i {
            font-size: 4rem;
            margin-bottom: 1rem;
            opacity: 0.5;
        }

        .empty-state h3 {
            font-size: 1.5rem;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

        .stats {
            background: var(--bg-secondary);
            padding: 1rem 2rem;
            border-top: 2px solid var(--border-color);
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .stat-item {
            text-align: center;
        }

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

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

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

        @keyframes slideIn {
            from {
                transform: scale(0.9);
                opacity: 0;
            }
            to {
                transform: scale(1);
                opacity: 1;
            }
        }

        @media (max-width: 768px) {
            body {
                padding: 1rem;
            }

            .header h1 {
                font-size: 2rem;
            }

            .toolbar {
                flex-direction: column;
            }

            .search-box {
                width: 100%;
            }

            .contacts-grid {
                grid-template-columns: 1fr;
                padding: 1rem;
            }

            .modal-content {
                padding: 1.5rem;
            }
        }