:root {
            --primary: #2a4365;
            --secondary: #dd6b20;
            --accent: #38a169;
            --light: #f7fafc;
            --dark: #1a202c;
            --gray: #718096;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: var(--light);
            color: var(--dark);
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary), #1a365d);
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary);
        }
        .logo span {
            background: linear-gradient(to right, #fbd38d, #dd6b20);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .search-box {
            display: flex;
            flex: 0 1 400px;
        }
        .search-box input {
            flex-grow: 1;
            padding: 12px 20px;
            border: none;
            border-radius: 30px 0 0 30px;
            font-size: 1rem;
        }
        .search-box button {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 30px 30px 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-box button:hover {
            background-color: #c05621;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            background: none;
            border: none;
            color: white;
        }
        nav {
            margin-top: 1rem;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
            justify-content: center;
            background-color: rgba(255, 255, 255, 0.08);
            padding: 1rem;
            border-radius: 10px;
        }
        .nav-links a {
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a:hover, .nav-links a.active {
            background-color: var(--secondary);
            color: white;
        }
        .breadcrumb {
            padding: 1rem 0;
            color: var(--gray);
            font-size: 0.9rem;
        }
        .breadcrumb a:hover {
            color: var(--secondary);
        }
        main {
            padding: 2rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        article {
            background: white;
            border-radius: 15px;
            padding: 2.5rem;
            box-shadow: var(--shadow);
        }
        h1 {
            color: var(--primary);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--secondary);
            padding-bottom: 1rem;
        }
        h2 {
            color: var(--primary);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-left: 10px;
            border-left: 5px solid var(--accent);
        }
        h3 {
            color: var(--dark);
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--primary);
            font-weight: 600;
            background: #e6fffa;
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 5px solid var(--accent);
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fffaf0;
            padding: 2rem;
            border-radius: 10px;
            border: 2px dashed var(--secondary);
            margin: 2rem 0;
        }
        .stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-card {
            background: linear-gradient(145deg, #ffffff, #edf2f7);
            padding: 1.5rem;
            border-radius: 10px;
            text-align: center;
            box-shadow: var(--shadow);
            border-top: 4px solid var(--accent);
        }
        .stat-card i {
            font-size: 2.5rem;
            color: var(--secondary);
            margin-bottom: 1rem;
        }
        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
        }
        .image-container {
            margin: 2.5rem 0;
            text-align: center;
        }
        .feature-img {
            max-width: 100%;
            height: auto;
            border-radius: 15px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            transition: transform 0.5s ease;
        }
        .feature-img:hover {
            transform: scale(1.01);
        }
        .caption {
            font-style: italic;
            color: var(--gray);
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        blockquote {
            border-left: 5px solid var(--secondary);
            padding: 1.5rem 2rem;
            margin: 2.5rem 0;
            background-color: #fefcbf;
            border-radius: 0 10px 10px 0;
            font-style: italic;
        }
        blockquote i {
            color: var(--secondary);
            margin-right: 10px;
        }
        ul, ol {
            padding-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.8rem;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 8px;
        }
        .keyword {
            font-weight: 800;
            color: var(--primary);
            background-color: #ebf8ff;
            padding: 2px 6px;
            border-radius: 3px;
        }
        aside {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            border-radius: 15px;
            padding: 1.8rem;
            box-shadow: var(--shadow);
        }
        .widget-title {
            color: var(--primary);
            font-size: 1.4rem;
            margin-bottom: 1.2rem;
            padding-bottom: 0.7rem;
            border-bottom: 2px solid #e2e8f0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 2rem;
            color: #f6ad55;
            margin: 1rem 0;
        }
        .stars i {
            cursor: pointer;
            transition: var(--transition);
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        #rating-form button {
            width: 100%;
            padding: 12px;
            background-color: var(--accent);
            color: white;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            margin-top: 1rem;
            transition: var(--transition);
        }
        #rating-form button:hover {
            background-color: #2f855a;
        }
        .comment-form textarea {
            width: 100%;
            height: 150px;
            padding: 15px;
            border: 1px solid #cbd5e0;
            border-radius: 8px;
            resize: vertical;
            margin-bottom: 1rem;
            font-size: 1rem;
        }
        .comment-form button {
            padding: 12px 30px;
            background-color: var(--primary);
            color: white;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .comment-form button:hover {
            background-color: #1a365d;
        }
        .download-box {
            background: linear-gradient(135deg, var(--primary), #4a5568);
            color: white;
            text-align: center;
            padding: 2rem;
            border-radius: 15px;
        }
        .download-box a {
            display: inline-block;
            background-color: var(--secondary);
            color: white;
            padding: 15px 30px;
            border-radius: 50px;
            font-weight: 700;
            margin-top: 1.2rem;
            font-size: 1.1rem;
        }
        .download-box a:hover {
            background-color: #c05621;
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(0,0,0,0.2);
        }
        .web-links-section {
            background: linear-gradient(to right, #2a4365, #4a5568);
            color: white;
            padding: 3rem 0;
            margin-top: 3rem;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.2rem;
        }
        .web-link {
            background: rgba(255, 255, 255, 0.1);
            padding: 1.2rem;
            border-radius: 10px;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .web-link:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateX(10px);
        }
        .web-link a {
            color: #fbd38d;
            font-weight: 600;
            display: block;
        }
        .web-link a:hover {
            color: white;
        }
        footer {
            background-color: var(--dark);
            color: #cbd5e0;
            padding: 3rem 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4a5568;
            font-size: 0.95rem;
            color: #a0aec0;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            .nav-links {
                flex-wrap: wrap;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .search-box {
                order: 3;
                flex: 1 1 100%;
                margin-top: 1rem;
            }
            .hamburger {
                display: block;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                margin-top: 1rem;
                padding: 1.5rem;
            }
            .nav-links.active {
                display: flex;
            }
            h1 {
                font-size: 2.2rem;
            }
            article {
                padding: 1.8rem;
            }
            .stats {
                grid-template-columns: 1fr;
            }
        }
        .interactive {
            cursor: pointer;
            user-select: none;
        }
        .tooltip {
            position: relative;
            display: inline-block;
            border-bottom: 1px dotted var(--secondary);
        }
        .tooltip .tooltiptext {
            visibility: hidden;
            width: 200px;
            background-color: var(--dark);
            color: #fff;
            text-align: center;
            border-radius: 6px;
            padding: 10px;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            margin-left: -100px;
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 0.9rem;
        }
        .tooltip:hover .tooltiptext {
            visibility: visible;
            opacity: 1;
        }
        .fade-in {
            animation: fadeIn 1s ease-in;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }