:root {
            --primary-blue: #2B8B9E;
            --light-blue: #7BBFCC;
            --pale-blue: #E8F4F6;
            --white: #FFFFFF;
            --dark-text: #2C3E50;
            --success: #27AE60;
            --error: #E74C3C;
            --warning: #F39C12;
            --soft-pink: #F8E8EE;
            --warm-gold: #F4D03F;
        }

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

        body {
            font-family: 'Open Sans', sans-serif;
            background: linear-gradient(135deg, var(--pale-blue) 0%, var(--white) 50%, var(--pale-blue) 100%);
            min-height: 100vh;
            color: var(--dark-text);
            line-height: 1.7;
        }

        .container {
            max-width: 900px;
            margin: 0 auto;
            padding: 20px;
        }

        /* Welcome Screen */
        .welcome-screen {
            background: var(--white);
            border-radius: 20px;
            padding: 50px 40px;
            text-align: center;
            box-shadow: 0 4px 30px rgba(43, 139, 158, 0.15);
            animation: fadeInUp 0.6s ease;
        }

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

        .welcome-screen h1 {
            font-family: 'Lora', serif;
            font-size: 2.2rem;
            color: var(--primary-blue);
            margin-bottom: 10px;
        }

        .welcome-screen .subtitle {
            color: var(--light-blue);
            font-size: 1.1rem;
            margin-bottom: 40px;
        }

        .welcome-form {
            max-width: 400px;
            margin: 0 auto;
        }

        .form-group {
            text-align: left;
            margin-bottom: 25px;
        }

        .form-group label {
            display: block;
            font-weight: 600;
            color: var(--primary-blue);
            margin-bottom: 8px;
        }

        .form-group input {
            width: 100%;
            padding: 15px 20px;
            border: 2px solid var(--pale-blue);
            border-radius: 10px;
            font-size: 1rem;
            font-family: 'Open Sans', sans-serif;
            transition: all 0.3s ease;
        }

        .form-group input:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(43, 139, 158, 0.1);
        }

        .form-group input::placeholder {
            color: var(--light-blue);
        }

        .welcome-features {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin: 40px 0;
            text-align: center;
        }

        .welcome-feature {
            padding: 20px;
            background: var(--pale-blue);
            border-radius: 12px;
        }

        .welcome-feature-icon {
            font-size: 2rem;
            margin-bottom: 10px;
        }

        .welcome-feature h4 {
            color: var(--primary-blue);
            font-size: 0.95rem;
            margin-bottom: 5px;
        }

        .welcome-feature p {
            font-size: 0.85rem;
            color: var(--dark-text);
            opacity: 0.8;
        }

        /* Header */
        .header {
            text-align: center;
            padding: 30px 20px;
            background: var(--white);
            border-radius: 20px;
            margin-bottom: 25px;
            box-shadow: 0 4px 20px rgba(43, 139, 158, 0.1);
        }

        .logo-container {
            margin-bottom: 15px;
        }

        .logo-text {
            font-family: 'Lora', serif;
            font-size: 0.9rem;
            color: var(--primary-blue);
            letter-spacing: 2px;
            margin-bottom: 5px;
        }

        .header h1 {
            font-family: 'Lora', serif;
            font-size: 1.8rem;
            color: var(--primary-blue);
            margin-bottom: 5px;
            font-weight: 600;
        }

        .header p {
            color: var(--light-blue);
            font-size: 1rem;
        }

        .user-greeting {
            background: var(--pale-blue);
            display: inline-block;
            padding: 8px 20px;
            border-radius: 20px;
            margin-top: 10px;
            font-weight: 500;
            color: var(--primary-blue);
        }

        /* Progress Bar */
        .progress-container {
            background: var(--white);
            border-radius: 15px;
            padding: 18px 25px;
            margin-bottom: 25px;
            box-shadow: 0 4px 20px rgba(43, 139, 158, 0.1);
        }

        .progress-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 10px;
        }

        .progress-label {
            font-weight: 600;
            color: var(--primary-blue);
            font-size: 0.9rem;
        }

        .progress-bar {
            height: 10px;
            background: var(--pale-blue);
            border-radius: 10px;
            overflow: hidden;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--light-blue), var(--primary-blue));
            border-radius: 10px;
            transition: width 0.5s ease;
        }

        /* Navigation Tabs */
        .nav-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            background: var(--white);
            padding: 12px;
            border-radius: 15px;
            margin-bottom: 25px;
            box-shadow: 0 4px 20px rgba(43, 139, 158, 0.1);
        }

        .nav-tab {
            flex: 1;
            min-width: 100px;
            padding: 10px 12px;
            background: var(--pale-blue);
            border: none;
            border-radius: 10px;
            cursor: pointer;
            font-family: 'Open Sans', sans-serif;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--primary-blue);
            transition: all 0.3s ease;
            text-align: center;
            position: relative;
        }

        .nav-tab:hover {
            background: var(--light-blue);
            color: var(--white);
        }

        .nav-tab.active {
            background: var(--primary-blue);
            color: var(--white);
        }

        .nav-tab.completed::after {
            content: '✓';
            position: absolute;
            top: -6px;
            right: -6px;
            background: var(--success);
            color: white;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            font-size: 11px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* Content Sections */
        .content-section {
            background: var(--white);
            border-radius: 20px;
            padding: 35px;
            margin-bottom: 25px;
            box-shadow: 0 4px 20px rgba(43, 139, 158, 0.1);
            display: none;
            animation: fadeIn 0.5s ease;
        }

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

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .content-section h2 {
            font-family: 'Lora', serif;
            font-size: 1.6rem;
            color: var(--primary-blue);
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 3px solid var(--pale-blue);
        }

        .content-section h3 {
            font-family: 'Lora', serif;
            font-size: 1.25rem;
            color: var(--primary-blue);
            margin: 25px 0 15px 0;
        }

        .content-section p {
            margin-bottom: 15px;
        }

        /* Benefit Highlight Boxes */
        .benefit-box {
            background: linear-gradient(135deg, var(--pale-blue) 0%, #D4EEF2 100%);
            border-radius: 15px;
            padding: 25px;
            margin: 20px 0;
            border-left: 5px solid var(--primary-blue);
        }

        .benefit-box h4 {
            color: var(--primary-blue);
            font-size: 1.1rem;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .benefit-box p {
            margin-bottom: 0;
        }

        /* Info Boxes */
        .info-box {
            background: var(--pale-blue);
            border-left: 4px solid var(--primary-blue);
            padding: 20px;
            border-radius: 0 12px 12px 0;
            margin: 20px 0;
        }

        .info-box.warning {
            background: #FFF9E6;
            border-left-color: var(--warning);
        }

        .info-box.success {
            background: #E8F8F0;
            border-left-color: var(--success);
        }

        .info-box-title {
            font-weight: 600;
            color: var(--primary-blue);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .info-box.warning .info-box-title {
            color: var(--warning);
        }

        /* Lists */
        .content-section ul, .content-section ol {
            margin: 15px 0 15px 25px;
        }

        .content-section li {
            margin-bottom: 10px;
            padding-left: 5px;
        }

        /* Key Points */
        .key-point {
            display: flex;
            align-items: flex-start;
            gap: 15px;
            padding: 18px;
            background: linear-gradient(135deg, var(--pale-blue) 0%, #E0F3F6 100%);
            border-radius: 12px;
            margin: 15px 0;
            transition: transform 0.2s ease;
        }

        .key-point:hover {
            transform: translateX(5px);
        }

        .key-point-icon {
            width: 45px;
            height: 45px;
            background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.3rem;
            flex-shrink: 0;
        }

        .key-point-content {
            flex: 1;
        }

        .key-point-content strong {
            color: var(--primary-blue);
            font-size: 1.05rem;
        }

        /* Script Box */
        .script-box {
            background: linear-gradient(135deg, var(--pale-blue) 0%, #D4EEF2 100%);
            border-radius: 15px;
            padding: 25px;
            margin: 20px 0;
            position: relative;
            border: 2px solid var(--light-blue);
        }

        .script-box::before {
            content: '"';
            font-family: 'Lora', serif;
            font-size: 4rem;
            color: var(--light-blue);
            position: absolute;
            top: 10px;
            left: 20px;
            opacity: 0.5;
        }

        .script-box p {
            font-style: italic;
            padding-left: 40px;
            color: var(--dark-text);
        }

        .script-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary-blue);
            margin-bottom: 10px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* Checklist */
        .checklist {
            list-style: none;
            margin-left: 0;
        }

        .checklist li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 15px;
            background: var(--pale-blue);
            border-radius: 10px;
            margin-bottom: 10px;
            transition: transform 0.2s ease;
        }

        .checklist li:hover {
            transform: translateX(5px);
        }

        .checklist-icon {
            width: 24px;
            height: 24px;
            background: var(--primary-blue);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 12px;
            flex-shrink: 0;
        }

        /* Navigation Buttons */
        .nav-buttons {
            display: flex;
            justify-content: space-between;
            gap: 15px;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 2px solid var(--pale-blue);
        }

        .btn {
            padding: 14px 30px;
            border: none;
            border-radius: 10px;
            cursor: pointer;
            font-family: 'Open Sans', sans-serif;
            font-size: 1rem;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
            color: var(--white);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(43, 139, 158, 0.4);
        }

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

        .btn-secondary:hover {
            background: var(--light-blue);
            color: var(--white);
        }

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

        .btn-large {
            font-size: 1.15rem;
            padding: 18px 45px;
        }

        /* Benefits Grid */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            margin: 20px 0;
        }

        .benefit-card {
            background: linear-gradient(135deg, var(--pale-blue), #E0F3F6);
            border-radius: 12px;
            padding: 20px;
            text-align: center;
            transition: transform 0.3s ease;
        }

        .benefit-card:hover {
            transform: translateY(-5px);
        }

        .benefit-card-icon {
            font-size: 2rem;
            margin-bottom: 10px;
        }

        .benefit-card h4 {
            color: var(--primary-blue);
            font-size: 1rem;
            margin-bottom: 8px;
        }

        .benefit-card p {
            font-size: 0.9rem;
            margin: 0;
            color: var(--dark-text);
        }

        /* Quiz Styles */
        .quiz-question {
            background: var(--pale-blue);
            border-radius: 15px;
            padding: 25px;
            margin-bottom: 25px;
            animation: fadeIn 0.4s ease;
        }

        .question-number {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--light-blue);
            margin-bottom: 10px;
        }

        .question-text {
            font-size: 1.1rem;
            font-weight: 500;
            color: var(--dark-text);
            margin-bottom: 20px;
        }

        .quiz-options {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .quiz-option {
            display: flex;
            align-items: center;
            gap: 15px;
            padding: 15px 20px;
            background: var(--white);
            border: 2px solid transparent;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .quiz-option:hover {
            border-color: var(--light-blue);
            background: #F8FCFD;
            transform: translateX(5px);
        }

        .quiz-option.selected {
            border-color: var(--primary-blue);
            background: #E8F4F6;
        }

        .quiz-option.correct {
            border-color: var(--success);
            background: #E8F8F0;
        }

        .quiz-option.incorrect {
            border-color: var(--error);
            background: #FDEDED;
        }

        .option-letter {
            width: 32px;
            height: 32px;
            background: var(--pale-blue);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            color: var(--primary-blue);
            flex-shrink: 0;
            transition: all 0.3s ease;
        }

        .quiz-option.selected .option-letter {
            background: var(--primary-blue);
            color: var(--white);
        }

        .quiz-option.correct .option-letter {
            background: var(--success);
            color: var(--white);
        }

        .quiz-option.incorrect .option-letter {
            background: var(--error);
            color: var(--white);
        }

        /* Results */
        .results-container {
            text-align: center;
            padding: 30px;
            animation: fadeIn 0.5s ease;
        }

        .results-score {
            font-family: 'Lora', serif;
            font-size: 4rem;
            font-weight: 600;
            margin: 20px 0;
        }

        .results-score.pass {
            color: var(--success);
        }

        .results-score.fail {
            color: var(--error);
        }

        .results-message {
            font-size: 1.2rem;
            margin-bottom: 25px;
        }

        .results-details {
            background: var(--pale-blue);
            border-radius: 15px;
            padding: 25px;
            margin: 25px 0;
            text-align: left;
        }

        .results-details h4 {
            color: var(--primary-blue);
            margin-bottom: 15px;
        }

        /* Certificate */
        .certificate {
            background: linear-gradient(135deg, #FFFFFF 0%, var(--pale-blue) 100%);
            border: 4px solid var(--primary-blue);
            border-radius: 20px;
            padding: 50px 40px;
            margin: 30px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .certificate::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 8px;
            background: linear-gradient(90deg, var(--light-blue), var(--primary-blue), var(--light-blue));
        }

        .certificate-badge {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 2.5rem;
            color: white;
            box-shadow: 0 4px 15px rgba(43, 139, 158, 0.3);
        }

        .certificate h3 {
            font-family: 'Lora', serif;
            font-size: 1.6rem;
            color: var(--primary-blue);
            margin-bottom: 25px;
            letter-spacing: 2px;
        }

        .certificate .cert-label {
            font-size: 0.95rem;
            color: var(--dark-text);
            margin-bottom: 5px;
        }

        .certificate .cert-name {
            font-family: 'Lora', serif;
            font-size: 2rem;
            color: var(--primary-blue);
            margin: 10px 0 25px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-blue);
            display: inline-block;
        }

        .certificate .cert-course {
            font-weight: 600;
            font-size: 1.1rem;
            color: var(--dark-text);
            margin: 15px 0;
        }

        .certificate .cert-org {
            color: var(--primary-blue);
            font-weight: 500;
        }

        .certificate .cert-date {
            color: var(--light-blue);
            font-size: 0.9rem;
            margin-top: 25px;
        }

        .certificate .cert-score {
            display: inline-block;
            background: var(--success);
            color: white;
            padding: 8px 20px;
            border-radius: 20px;
            font-weight: 600;
            margin-top: 15px;
        }

        .print-btn {
            background: var(--white);
            border: 2px solid var(--primary-blue);
            color: var(--primary-blue);
            padding: 12px 30px;
            border-radius: 10px;
            cursor: pointer;
            font-family: 'Open Sans', sans-serif;
            font-size: 1rem;
            font-weight: 600;
            transition: all 0.3s ease;
            margin-top: 20px;
        }

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

        /* Table Styles */
        .info-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            border-radius: 12px;
            overflow: hidden;
        }

        .info-table th,
        .info-table td {
            padding: 15px;
            text-align: left;
            border-bottom: 1px solid var(--pale-blue);
        }

        .info-table th {
            background: var(--primary-blue);
            color: var(--white);
            font-weight: 600;
        }

        .info-table tr:nth-child(even) {
            background: var(--pale-blue);
        }

        .info-table tr:hover {
            background: #D4EEF2;
        }

        /* Expandable Sections */
        .expandable {
            margin: 15px 0;
        }

        .expandable-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
            background: var(--pale-blue);
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .expandable-header:hover {
            background: #D4EEF2;
        }

        .expandable-header h4 {
            color: var(--primary-blue);
            font-size: 1rem;
        }

        .expandable-icon {
            font-size: 1.2rem;
            color: var(--primary-blue);
            transition: transform 0.3s ease;
        }

        .expandable.open .expandable-icon {
            transform: rotate(180deg);
        }

        .expandable-content {
            display: none;
            padding: 20px;
            background: var(--white);
            border: 1px solid var(--pale-blue);
            border-top: none;
            border-radius: 0 0 10px 10px;
            animation: fadeIn 0.3s ease;
        }

        .expandable.open .expandable-content {
            display: block;
        }

        /* Quick Reference Card */
        .quick-ref-card {
            background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
            border-radius: 15px;
            padding: 25px;
            color: white;
            margin: 25px 0;
        }

        .quick-ref-card h4 {
            font-family: 'Lora', serif;
            font-size: 1.2rem;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .quick-ref-card ul {
            list-style: none;
            margin: 0;
        }

        .quick-ref-card li {
            padding: 8px 0;
            border-bottom: 1px solid rgba(255,255,255,0.2);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .quick-ref-card li:last-child {
            border-bottom: none;
        }

        /* Testimonial Style Box */
        .testimonial-box {
            background: linear-gradient(135deg, #F8FCFD, var(--pale-blue));
            border-radius: 15px;
            padding: 25px;
            margin: 20px 0;
            position: relative;
            border: 1px solid var(--light-blue);
        }

        .testimonial-box::before {
            content: '💬';
            position: absolute;
            top: -15px;
            left: 20px;
            font-size: 1.5rem;
            background: var(--white);
            padding: 5px;
            border-radius: 50%;
        }

        .testimonial-box p {
            font-style: italic;
            margin-bottom: 10px;
        }

        .testimonial-box .source {
            font-size: 0.9rem;
            color: var(--primary-blue);
            font-weight: 500;
        }

        /* Hidden for print */
        @media print {
            .no-print {
                display: none !important;
            }
            .certificate {
                border: 4px solid var(--primary-blue) !important;
                -webkit-print-color-adjust: exact;
                print-color-adjust: exact;
            }
        }

        /* Responsive */
        @media (max-width: 768px) {
            .container {
                padding: 15px;
            }

            .welcome-screen {
                padding: 30px 20px;
            }

            .welcome-screen h1 {
                font-size: 1.7rem;
            }

            .welcome-features {
                grid-template-columns: 1fr;
            }

            .benefits-grid {
                grid-template-columns: 1fr;
            }

            .header h1 {
                font-size: 1.5rem;
            }

            .content-section {
                padding: 25px 20px;
            }

            .nav-tabs {
                flex-direction: column;
            }

            .nav-tab {
                min-width: 100%;
            }

            .nav-buttons {
                flex-direction: column;
            }

            .btn {
                width: 100%;
            }

            .certificate {
                padding: 30px 20px;
            }

            .certificate .cert-name {
                font-size: 1.5rem;
            }
        }

        /* Main content wrapper */
        .main-content {
            display: none;
        }

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