:root {
            --primary: #4361ee;
            --primary-dark: #3a56d4;
            --success: #4cc9f0;
            --error: #f72585;
            --warning: #f8961e;
            --light-bg: #f8f9fa;
            --card-bg: #ffffff;
            --text: #2b2d42;
            --text-light: #8d99ae;
            --border-radius: 12px;
            --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        }
        
        body {
            font-family: 'Poppins', sans-serif;
            max-width: 640px;
            margin: 0 auto;
            padding: 20px;
            background-color: var(--light-bg);
            color: var(--text);
            line-height: 1.6;
        }
        
        .container {
            background-color: var(--card-bg);
            padding: 30px;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            margin-bottom: 20px;
        }
        
        h1, h2, h3 {
            color: var(--primary);
            font-weight: 600;
            margin-top: 0;
        }
        
        h1 {
            text-align: center;
            margin-bottom: 24px;
            font-size: 28px;
        }
        
        h2 {
            font-size: 20px;
            margin-bottom: 16px;
        }
        
        button {
            font-family: 'Poppins', sans-serif;
            font-weight: 500;
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: var(--border-radius);
            cursor: pointer;
            margin: 8px;
            font-size: 16px;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        
        button:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
        }
        
        button:active {
            transform: translateY(0);
        }
        
        .instructions {
            background-color: rgba(67, 97, 238, 0.08);
            padding: 20px;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--primary);
            margin-bottom: 24px;
        }
        
        .word-display {
            font-size: 36px;
            font-weight: 600;
            margin: 24px 0;
            color: var(--text);
            padding: 20px;
            background-color: rgba(67, 97, 238, 0.05);
            border-radius: var(--border-radius);
            text-align: center;
            min-width: 200px;
        }
        
        .feedback {
            margin: 20px 0;
            padding: 16px;
            border-radius: var(--border-radius);
            display: none;
            text-align: center;
            font-weight: 500;
        }
        
        .correct {
            background-color: rgba(76, 201, 240, 0.1);
            color: #1e88e5;
            border-left: 4px solid var(--success);
        }
        
        .incorrect {
            background-color: rgba(247, 37, 133, 0.1);
            color: var(--error);
            border-left: 4px solid var(--error);
        }
        
        .progress-container {
            margin: 20px 0;
            text-align: center;
        }
        
        .progress-text {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 8px;
        }
        
        .progress-bar {
            height: 8px;
            background-color: rgba(67, 97, 238, 0.1);
            border-radius: 4px;
            margin: 10px 0;
            overflow: hidden;
        }
        
        .progress {
            height: 100%;
            background-color: var(--primary);
            width: 0%;
            border-radius: 4px;
            transition: width 0.4s ease;
        }
        
        .response-options {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 20px;
            gap: 12px;
        }
        
        .results-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 14px;
        }
        
        .results-table th, .results-table td {
            border: 1px solid #e9ecef;
            padding: 12px;
            text-align: center;
        }
        
        .results-table th {
            background-color: rgba(67, 97, 238, 0.1);
            color: var(--primary);
            font-weight: 500;
        }
        
        .results-table tr:nth-child(even) {
            background-color: rgba(67, 97, 238, 0.03);
        }
        
        .hidden {
            display: none;
        }
        
        .sound-btn {
            background-color: var(--primary);
            margin: 16px auto;
        }
        
        .correct-btn {
            background-color: var(--success);
        }
        
        .incorrect-btn {
            background-color: var(--error);
        }
        
        .no-response-btn {
            background-color: var(--warning);
            color: white;
        }
        
        .icon {
            margin-right: 8px;
            font-size: 18px;
        }
        
        .results-summary {
            text-align: center;
            margin: 24px 0;
        }
        
        .score {
            font-size: 48px;
            font-weight: 600;
            color: var(--primary);
            margin: 10px 0;
        }
        
        .assessment-area {
            text-align: center;
            padding: 20px 0;
        }
        
        .completion-screen {
            text-align: center;
            padding: 30px;
        }
        
        .completion-icon {
            font-size: 80px;
            color: var(--success);
            margin-bottom: 20px;
        }
        
        .completion-message {
            font-size: 24px;
            margin-bottom: 20px;
            color: var(--primary);
        }
        
        .action-buttons {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-top: 30px;
        }
        
        .records-btn {
            background-color: var(--warning);
        }
        
        @media (max-width: 480px) {
            .container {
                padding: 20px;
            }
            
            .word-display {
                font-size: 28px;
                padding: 16px;
            }
            
            button {
                padding: 10px 16px;
                font-size: 14px;
            }
            
            .response-options {
                flex-direction: column;
                align-items: center;
            }
            
            .action-buttons {
                flex-direction: column;
                align-items: center;
            }
        }