:root {
            --primary-color: #ff6b35;
            --secondary-color: #f7931e;
            --accent-color: #e4405f;
            --text-dark: #2d3748;
            --text-light: #718096;
            --bg-light: #f8f9fa;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }
        .main-container {
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            overflow: hidden;
            margin-top: 20px;
            margin-bottom: 20px;
        }
        .logo {
            font-family: 'Arial Black', Gadget, sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--primary-color);
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
        }
        .logo:hover {
            color: var(--accent-color);
            transform: scale(1.05);
        }
        .nav-link {
            font-weight: 600;
            color: var(--text-dark);
            transition: all 0.3s ease;
            border-radius: 5px;
            margin: 0 5px;
        }
        .nav-link:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-2px);
        }
        h1, h2, h3 {
            color: var(--primary-color);
            margin-bottom: 1rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: 10px;
            text-align: center;
        }
        h2 {
            font-size: 2rem;
            border-left: 5px solid var(--accent-color);
            padding-left: 15px;
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.5rem;
            color: var(--secondary-color);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background-color: rgba(255, 107, 53, 0.1);
            border-left: 4px solid var(--primary-color);
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
        }
        .key-point {
            font-weight: 700;
            color: var(--accent-color);
        }
        .feature-icon {
            font-size: 2rem;
            color: var(--primary-color);
            margin-right: 15px;
            transition: all 0.3s ease;
        }
        .feature-item:hover .feature-icon {
            transform: rotate(15deg) scale(1.2);
            color: var(--accent-color);
        }
        .image-container {
            position: relative;
            overflow: hidden;
            border-radius: 10px;
            margin: 25px 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
        }
        .image-container:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.2);
        }
        .image-caption {
            background: rgba(0,0,0,0.7);
            color: white;
            padding: 10px;
            text-align: center;
            font-style: italic;
        }
        .table-custom {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .table-custom thead {
            background-color: var(--primary-color);
            color: white;
        }
        footer {
            background: linear-gradient(135deg, #2d3748 0%, #4a5568 100%);
            color: white;
            padding: 30px 0 15px;
            margin-top: 40px;
        }
        .social-icon {
            font-size: 1.5rem;
            color: white;
            margin: 0 10px;
            transition: all 0.3s ease;
        }
        .social-icon:hover {
            color: var(--secondary-color);
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .logo {
                font-size: 1.8rem;
            }
        }
        .content-section {
            padding: 30px;
        }
        .toc {
            background-color: var(--bg-light);
            border-radius: 10px;
            padding: 20px;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .toc ul {
            list-style-type: none;
            padding-left: 0;
        }
        .toc li {
            margin-bottom: 10px;
            padding-left: 15px;
            border-left: 3px solid transparent;
            transition: all 0.3s ease;
        }
        .toc li:hover {
            border-left-color: var(--primary-color);
            padding-left: 20px;
        }
        .toc a {
            color: var(--text-dark);
            text-decoration: none;
            font-weight: 600;
        }
        .toc a:hover {
            color: var(--primary-color);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--primary-color);
            display: block;
        }
        .stat-label {
            font-size: 1rem;
            color: var(--text-light);
        }
        .quote {
            font-style: italic;
            border-left: 4px solid var(--secondary-color);
            padding-left: 20px;
            margin: 25px 0;
            color: var(--text-light);
        }
        .btn-custom {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            border: none;
            border-radius: 50px;
            padding: 10px 25px;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 5px 15px rgba(255, 107, 53, 0.3);
        }
        .btn-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(255, 107, 53, 0.5);
            color: white;
        }