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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            padding: 20px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: white;
            border-radius: 15px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            overflow: hidden;
        }

        .header {
            background: linear-gradient(45deg, #667eea, #764ba2);
            color: white;
            text-align: center;
            padding: 30px;
        }

        .header h1 {
            font-size: 2.5em;
            margin-bottom: 10px;
        }

        .tabs {
            display: flex;
            background: #f8f9fa;
            border-bottom: 1px solid #dee2e6;
        }

        .tab {
            flex: 1;
            padding: 20px;
            text-align: center;
            cursor: pointer;
            background: #e9ecef;
            border: none;
            font-size: 16px;
            font-weight: bold;
            transition: all 0.3s ease;
        }

        .tab:hover {
            background: #dee2e6;
        }

        .tab.active {
            background: white;
            color: #667eea;
            border-bottom: 3px solid #667eea;
        }

        .tab-content {
            display: none;
            padding: 30px;
            min-height: 500px;
        }

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

        /* Customer Interface */
        .service-buttons {
            display: grid;
            gap: 20px;
            margin-bottom: 30px;
        }

        .service-btn {
            padding: 30px;
            font-size: 1.5em;
            font-weight: bold;
            border: none;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
            background: linear-gradient(45deg, #28a745, #20c997);
            color: white;
            box-shadow: 0 5px 15px rgba(40, 167, 69, 0.3);
        }

        .service-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(40, 167, 69, 0.4);
        }

        .queue-display {
            text-align: center;
            padding: 20px;
            background: #f8f9fa;
            border-radius: 10px;
            margin-top: 20px;
        }

        .queue-number {
            font-size: 3em;
            font-weight: bold;
            color: #667eea;
            margin: 10px 0;
        }

        /* Employee Interface */
        .employee-section {
            background: #f8f9fa;
            padding: 20px;
            border-radius: 10px;
            margin-bottom: 20px;
        }

        .window-selector {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
            align-items: center;
        }

        .window-select {
            padding: 10px;
            border: 2px solid #dee2e6;
            border-radius: 5px;
            font-size: 16px;
        }

        .queue-controls {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .control-btn {
            padding: 15px 25px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-weight: bold;
            transition: all 0.3s ease;
        }

        .accept-btn {
            background: #28a745;
            color: white;
        }

        .complete-btn {
            background: #ffc107;
            color: black;
        }

        .control-btn:hover {
            transform: translateY(-1px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }

        .control-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
        }

        .pending-queues {
            margin-top: 20px;
        }

        .queue-item {
            background: white;
            padding: 15px;
            margin: 10px 0;
            border-radius: 8px;
            border-left: 4px solid #667eea;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        .service-icon {
            font-size: 1.2em;
            margin-right: 10px;
        }

        /* Public Display */
        .display-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }

        .display-table th {
            background: linear-gradient(45deg, #667eea, #764ba2);
            color: white;
            padding: 20px;
            text-align: left;
            font-size: 1.2em;
        }

        .display-table td {
            padding: 20px;
            border-bottom: 1px solid #dee2e6;
            font-size: 1.1em;
        }

        .display-table tr:hover {
            background: #f8f9fa;
        }

        .status-indicator {
            display: inline-block;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #28a745;
            margin-right: 10px;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { opacity: 1; }
            50% { opacity: 0.5; }
            100% { opacity: 1; }
        }

        .notification {
            position: fixed;
            top: 20px;
            right: 20px;
            padding: 15px 25px;
            background: #28a745;
            color: white;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
            transform: translateX(400px);
            transition: transform 0.3s ease;
            z-index: 1000;
        }

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

        .stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }

        .stat-card {
            background: white;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            text-align: center;
        }

        .stat-number {
            font-size: 2.5em;
            font-weight: bold;
            color: #667eea;
            margin-bottom: 5px;
        }

        .stat-label {
            color: #666;
            font-size: 1.1em;
        }

        /* Add Category Section */
        .add-category-section {
            margin: 20px 0;
            padding: 20px;
            background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
            border-radius: 10px;
            border: 2px solid #2196F3;
        }

        .category-input {
            width: 70%;
            padding: 12px;
            border: 2px solid #ccc;
            border-radius: 8px;
            font-size: 16px;
            margin-right: 10px;
        }

        .category-add-btn {
            padding: 12px 24px;
            background: #2196F3;
            color: white;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-weight: bold;
            font-size: 16px;
        }

        .category-add-btn:hover {
            background: #1976D2;
        }

        .current-categories {
            margin-top: 15px;
        }

        .category-pill {
            display: inline-block;
            background: #f0f0f0;
            padding: 5px 12px;
            margin: 3px;
            border-radius: 15px;
            font-size: 14px;
            border: 1px solid #ddd;
        }

        @media (max-width: 768px) {
            .tabs {
                flex-direction: column;
            }
            
            .queue-controls {
                flex-direction: column;
            }
            
            .window-selector {
                flex-direction: column;
                align-items: stretch;
            }
            
            .category-input {
                width: 100%;
                margin-right: 0;
                margin-bottom: 10px;
            }
        }