:root {
            --primary: #38AED7;
            --primary-dark: #2a8bb3;
            --secondary: #8b5cf6;
            --accent: #06b6d4;
            --light: #f8fafc;
            --dark: #0f172a;
            --text: #334155;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            color: var(--text);
            line-height: 1.6;
            overflow-x: hidden;
            background-color: var(--light);
        }
        
        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .btn {
            display: inline-block;
            background: var(--primary);
            color: white;
            padding: 12px 28px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }
        
        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(56, 174, 215, 0.3);
        }
        
        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
            margin-top: 10px;
            padding: 8px 16px;
            font-size: 0.9rem;
        }
        
        .btn-outline:hover {
            background: var(--primary);
            color: white;
            margin-top: 10px;
            padding: 8px 16px;
            font-size: 0.9rem;
        }
        
        section {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            color: var(--dark);
            margin-bottom: 20px;
        }
        
        .section-title p {
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto;
        }
        
        header {
            background: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: fixed;
            width: 100%;
            z-index: 1000;
        }
        
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }
        
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        
        .logo span {
            color: var(--secondary);
        }
        
        .logo i {
            margin-right: 10px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
        }
        
        .nav-links li {
            margin-left: 30px;
        }
        
        .nav-links a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 500;
            transition: color 0.3s ease;
        }
        
        .nav-links a:hover {
            color: var(--primary);
        }
        
        .hamburger {
            display: none;
            cursor: pointer;
        }
        
        /* Hero Section for Manual */
        .manual-hero {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            padding: 160px 0 100px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .manual-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-size: cover;
            background-position: center;
            opacity: 0.1;
        }
        
        .manual-hero-content {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }
        
        .manual-hero h1 {
            font-size: 3.5rem;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        
        .manual-hero p {
            font-size: 1.2rem;
            margin-bottom: 30px;
            opacity: 0.9;
        }
        
        /* Manual Content Section */
        .manual-content {
            background: white;
        }
        
        .manual-container {
            max-width: 1000px;
            margin: 0 auto;
        }
        
        /* Table of Contents */
        .toc {
            background: var(--light);
            padding: 30px;
            border-radius: 10px;
            margin-bottom: 50px;
        }
        
        .toc h3 {
            color: var(--dark);
            margin-bottom: 20px;
            font-size: 1.5rem;
        }
        
        .toc-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 15px;
        }
        
        .toc-list a {
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            transition: color 0.3s ease;
        }
        
        .toc-list a:hover {
            color: var(--primary-dark);
        }
        
        .toc-list i {
            margin-right: 10px;
        }
        
        /* Manual Sections */
        .manual-section {
            margin-bottom: 60px;
            padding-bottom: 40px;
            border-bottom: 1px solid #e2e8f0;
        }
        
        .manual-section:last-child {
            border-bottom: none;
        }
        
        .manual-section h2 {
            font-size: 2rem;
            color: var(--dark);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light);
        }
        
        .manual-section h3 {
            font-size: 1.5rem;
            color: var(--dark);
            margin: 30px 0 15px 0;
        }
        
        .manual-section p {
            margin-bottom: 15px;
        }
        
        .manual-section ul, .manual-section ol {
            margin-bottom: 20px;
            padding-left: 30px;
        }
        
        .manual-section li {
            margin-bottom: 10px;
        }
        
        /* Feature Cards */
        .feature-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin: 30px 0;
        }
        
        .feature-card {
            background: var(--light);
            padding: 25px;
            border-radius: 10px;
            border-left: 4px solid var(--primary);
            transition: transform 0.3s ease;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
        }
        
        .feature-card i {
            font-size: 2rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 15px;
        }
        
        .feature-card h4 {
            font-size: 1.3rem;
            color: var(--dark);
            margin-bottom: 10px;
        }
        
        /* Step-by-Step Guide */
        .steps {
            display: flex;
            flex-direction: column;
            gap: 30px;
            margin: 30px 0;
        }
        
        .step {
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }
        
        .step-number {
            background: var(--primary);
            color: white;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            flex-shrink: 0;
        }
        
        .step-content {
            flex: 1;
        }
        
        .step-content h4 {
            font-size: 1.2rem;
            color: var(--dark);
            margin-bottom: 10px;
        }
        
        /* Tips & Notes */
        .tip-box {
            background: #f0f9ff;
            padding: 20px;
            border-radius: 8px;
            border-left: 4px solid var(--accent);
            margin: 20px 0;
        }
        
        .warning-box {
            background: #fef2f2;
            padding: 20px;
            border-radius: 8px;
            border-left: 4px solid #ef4444;
            margin: 20px 0;
        }
        
        /* FAQ Section */
        .faq-item {
            background: var(--light);
            margin-bottom: 15px;
            border-radius: 8px;
            overflow: hidden;
        }
        
        .faq-question {
            padding: 20px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .faq-answer {
            padding: 0 20px 20px;
            display: none;
        }
        
        .faq-question i {
            transition: transform 0.3s ease;
        }
        
        .faq-question.active i {
            transform: rotate(180deg);
        }
        
        /* Quick Actions */
        .quick-actions {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
            margin: 30px 0;
            justify-content: center;
        }
        
        footer {
            background: var(--dark);
            color: white;
            padding: 50px 0 20px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-column h3 {
            font-size: 1.5rem;
            margin-bottom: 20px;
            color: white;
        }
        
        .footer-column ul {
            list-style: none;
        }
        
        .footer-column ul li {
            margin-bottom: 10px;
        }
        
        .footer-column a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        
        .footer-column a:hover {
            color: var(--primary);
        }
        
        .social-links {
            display: flex;
            gap: 15px;
        }
        
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            transition: all 0.3s ease;
        }
        
        .social-links a:hover {
            background: var(--primary);
            transform: translateY(-3px);
        }
        
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        /* Responsive Design */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: white;
                padding: 20px;
                box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
            }
            
            .nav-links.active {
                display: flex;
            }
            
            .nav-links li {
                margin: 10px 0;
            }
            
            .hamburger {
                display: block;
            }
            
            .manual-hero h1 {
                font-size: 2.5rem;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
            
            .step {
                flex-direction: column;
            }
            
            .step-number {
                align-self: flex-start;
            }
        }