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

        body {
            font-family: 'Poppins', sans-serif;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
        }

        .test-container {
            max-width: 900px;
            margin: 40px auto;
            padding: 20px;
        }

        .test-header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 40px;
            border-radius: 15px;
            text-align: center;
            margin-bottom: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        .test-header h1 {
            font-size: 2.5em;
            margin-bottom: 10px;
            font-weight: 700;
        }

        .test-header p {
            font-size: 1.1em;
            opacity: 0.95;
        }

        .test-info {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: white;
            padding: 20px 30px;
            border-radius: 10px;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            flex-wrap: wrap;
            gap: 15px;
        }

        .timer {
            font-size: 1.5em;
            font-weight: 600;
            color: #667eea;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .timer.warning {
            color: #e74c3c;
            animation: pulse 1s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.7; }
        }

        .progress-container {
            flex: 1;
            min-width: 200px;
        }

        .progress-label {
            font-size: 0.9em;
            color: #666;
            margin-bottom: 5px;
        }

        .progress-bar {
            width: 100%;
            height: 10px;
            background: #e0e0e0;
            border-radius: 5px;
            overflow: hidden;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #667eea, #764ba2);
            transition: width 0.3s ease;
        }

        .question-card {
            background: white;
            padding: 40px;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
            margin-bottom: 30px;
        }

        .question-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 2px solid #f0f0f0;
        }

        .question-number {
            font-size: 1.1em;
            font-weight: 600;
            color: #667eea;
        }

        .question-topic {
            background: #f0f4ff;
            color: #667eea;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.9em;
            font-weight: 500;
        }

        .question-text {
            font-size: 1.2em;
            font-weight: 500;
            color: #333;
            margin-bottom: 20px;
            line-height: 1.6;
        }

        .answer-input {
            width: 100%;
            min-height: 150px;
            padding: 15px;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            font-family: 'Poppins', sans-serif;
            font-size: 1em;
            resize: vertical;
            transition: border-color 0.3s ease;
        }

        .answer-input:focus {
            outline: none;
            border-color: #667eea;
        }

        .char-count {
            text-align: right;
            font-size: 0.85em;
            color: #666;
            margin-top: 5px;
        }

        .navigation {
            display: flex;
            justify-content: space-between;
            gap: 15px;
            margin-top: 30px;
        }

        .btn {
            padding: 14px 30px;
            border: none;
            border-radius: 8px;
            font-size: 1.05em;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            font-family: 'Poppins', sans-serif;
        }

        .btn-primary {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
        }

        .btn-secondary {
            background: #f0f0f0;
            color: #333;
        }

        .btn-secondary:hover {
            background: #e0e0e0;
        }

        .btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        .btn-submit {
            background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
            color: white;
        }

        .btn-submit:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(231, 76, 60, 0.4);
        }

        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 1000;
            overflow-y: auto;
        }

        .modal.active {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .modal-content {
            background: white;
            padding: 40px;
            border-radius: 20px;
            max-width: 900px;
            width: 100%;
            max-height: 90vh;
            overflow-y: auto;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
        }

        .results-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .score-display {
            font-size: 4em;
            font-weight: 700;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 10px;
        }

        .score-label {
            font-size: 1.3em;
            color: #666;
        }

        .performance-summary {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-bottom: 40px;
        }

        .stat-card {
            background: #f8f9ff;
            padding: 20px;
            border-radius: 10px;
            text-align: center;
        }

        .stat-value {
            font-size: 2em;
            font-weight: 700;
            color: #667eea;
        }

        .stat-label {
            color: #666;
            margin-top: 5px;
        }

        .start-screen {
            text-align: center;
            padding: 60px 40px;
        }

        .start-screen h2 {
            font-size: 2em;
            color: #333;
            margin-bottom: 20px;
        }

        .test-instructions {
            background: #f8f9ff;
            padding: 30px;
            border-radius: 10px;
            text-align: left;
            margin: 30px 0;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .test-instructions h3 {
            color: #667eea;
            margin-bottom: 15px;
        }

        .test-instructions ul {
            list-style-position: inside;
            color: #666;
        }

        .test-instructions li {
            margin-bottom: 10px;
        }

        .btn-start {
            background: linear-gradient(135deg, #27ae60 0%, #229954 100%);
            color: white;
            padding: 18px 50px;
            font-size: 1.2em;
        }

        .btn-start:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(39, 174, 96, 0.4);
        }

        .loading {
            text-align: center;
            padding: 40px;
            color: #667eea;
        }

        .spinner {
            border: 4px solid #f3f3f3;
            border-top: 4px solid #667eea;
            border-radius: 50%;
            width: 50px;
            height: 50px;
            animation: spin 1s linear infinite;
            margin: 20px auto;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .result-item {
            background: #f8f9ff;
            padding: 20px;
            border-radius: 10px;
            margin-bottom: 20px;
            border-left: 5px solid #667eea;
        }

        .result-question {
            font-weight: 600;
            color: #333;
            margin-bottom: 10px;
        }

        .result-answer {
            background: white;
            padding: 15px;
            border-radius: 8px;
            margin-bottom: 10px;
            color: #666;
        }

        .result-score {
            display: inline-block;
            background: #667eea;
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .result-feedback {
            background: #fff9e6;
            padding: 15px;
            border-radius: 8px;
            border-left: 3px solid #f39c12;
            color: #666;
        }

        @media (max-width: 768px) {
            .test-header h1 {
                font-size: 1.8em;
            }

            .question-card {
                padding: 25px;
            }

            .question-text {
                font-size: 1.05em;
            }

            .modal-content {
                padding: 25px;
            }

            .score-display {
                font-size: 3em;
            }
        }