:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
            --reaction-green: #28a745;
            --reaction-blue: #007bff;
            --reaction-red: #dc3545;
            --reaction-purple: #6f42c1;
        }
         
        
        /* Reaction Test Area */
        .reaction-test-area {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: 400px;
            margin: 2rem 0;
            padding: 2rem;
            background-color: var(--light-gray);
            border-radius: 12px;
            border: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }
        
        .reaction-circle {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background-color: #f0f0f0;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
            margin-bottom: 2rem;
        }
        
        .reaction-circle.waiting {
            background-color: var(--reaction-red);
            animation: pulse 2s infinite;
        }
        
        .reaction-circle.ready {
            background-color: var(--reaction-green);
        }
        
        .reaction-circle.too-soon {
            background-color: var(--reaction-purple);
        }
        
        .reaction-circle.completed {
            background-color: var(--reaction-blue);
        }
        
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }
        
        .reaction-instructions {
            text-align: center;
            margin-bottom: 1.5rem;
            max-width: 600px;
        }
        
        .reaction-status {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 1rem;
            min-height: 30px;
        }
        
        .reaction-time-display {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary-color);
            margin: 1rem 0;
            min-height: 70px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
         
        /* Responsive Adjustments */
        @media (max-width: 768px) {
            .tool-card {
                padding: 1.5rem;
            }
            
            .reaction-summary {
                grid-template-columns: 1fr;
            }
            
            .reaction-circle {
                width: 150px;
                height: 150px;
            }
            
            .reaction-time-display {
                font-size: 2.5rem;
            }
        }
         
        /* Test Controls */
        .test-controls {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 1.5rem;
            justify-content: center;
        }
        
        /* Reaction Time Classification */
        .reaction-classification {
            padding: 1rem;
            border-radius: 8px;
            margin: 1rem 0;
            border-left: 5px solid;
        }
        
        .reaction-excellent {
            background-color: rgba(40, 167, 69, 0.1);
            border-left-color: var(--reaction-green);
        }
        
        .reaction-good {
            background-color: rgba(0, 123, 255, 0.1);
            border-left-color: var(--reaction-blue);
        }
        
        .reaction-average {
            background-color: rgba(255, 193, 7, 0.1);
            border-left-color: var(--warning-color);
        }
        
        .reaction-slow {
            background-color: rgba(220, 53, 69, 0.1);
            border-left-color: var(--reaction-red);
        }
        
        .reaction-status-indicator {
            display: inline-block;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            margin-right: 8px;
        }
        
        .status-excellent {
            background-color: var(--reaction-green);
        }
        
        .status-good {
            background-color: var(--reaction-blue);
        }
        
        .status-average {
            background-color: var(--warning-color);
        }
        
        .status-slow {
            background-color: var(--reaction-red);
        }
        
        /* Test Settings */
        .test-settings {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            margin-bottom: 1.5rem;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }
        
        .settings-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin-top: 1rem;
        }
        
        .setting-item {
            display: flex;
            flex-direction: column;
        }
        
        .setting-label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-color);
        }
        
        /* Results Table */
        .results-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        
        .results-table th, .results-table td {
            padding: 0.75rem;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        
        .results-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        
        .results-table tr:hover {
            background-color: rgba(44, 125, 160, 0.05);
        }
        
        .generating-indicator {
            display: none;
            text-align: center;
            padding: 1rem;
            color: var(--text-muted);
        }
        
        /* Progress Bar */
        .progress-container {
            width: 100%;
            background-color: #e9ecef;
            border-radius: 4px;
            overflow: hidden;
            margin: 1.5rem 0;
            height: 10px;
        }
        
        .progress-bar {
            height: 100%;
            background-color: var(--primary-color);
            transition: width 0.3s;
        }
        
        .test-progress {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.5rem;
        }