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

        body {
            font-family: "Open Sans", sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f4f4f4;
        }

        header {
            background-color: #fff;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .header-top {
            background-color: #2c3e50;
            padding: 10px 0;
        }

        .header-top .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            color: #fff;
            font-size: 24px;
            font-weight: 700;
            text-decoration: none;
        }

        .social-links {
            display: flex;
            gap: 15px;
        }

        .social-links a {
            color: #fff;
            font-size: 18px;
            transition: color 0.3s;
        }

        .social-links a:hover {
            color: #3498db;
        }

        nav {
            background-color: #34495e;
        }

        nav ul {
            list-style: none;
            display: flex;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            flex-wrap: wrap;
        }

        nav ul li {
            margin: 0;
        }

        nav ul li a {
            display: block;
            padding: 15px 20px;
            color: #fff;
            text-decoration: none;
            transition: background-color 0.3s;
        }

        nav ul li a:hover {
            background-color: #2c3e50;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        main {
            background-color: #fff;
            margin: 30px auto;
            max-width: 1200px;
            padding: 40px 20px;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
        }

        h1 {
            font-size: 36px;
            color: #2c3e50;
            margin-bottom: 30px;
            padding-bottom: 15px;
            border-bottom: 3px solid #3498db;
        }

        article {
            margin-bottom: 40px;
        }

        article h2 {
            font-size: 28px;
            color: #34495e;
            margin-top: 30px;
            margin-bottom: 15px;
        }

        article h3 {
            font-size: 22px;
            color: #34495e;
            margin-top: 25px;
            margin-bottom: 12px;
        }

        article p {
            margin-bottom: 20px;
            text-align: justify;
            font-size: 16px;
            line-height: 1.8;
        }

        .transition-section {
            background-color: #ecf0f1;
            padding: 30px;
            margin: 40px 0;
            border-left: 4px solid #3498db;
        }

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

        .links-section {
            background-color: #fff;
            padding: 40px 30px;
            margin-top: 40px;
            border: 1px solid #e0e0e0;
            border-radius: 5px;
        }

        .links-section h3 {
            font-size: 24px;
            color: #2c3e50;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #3498db;
        }

        .links-section ul {
            list-style: none;
            column-count: 2;
            column-gap: 30px;
        }

        .links-section ul li {
            margin-bottom: 12px;
            break-inside: avoid;
        }

        .links-section ul li a {
            color: #3498db;
            text-decoration: none;
            transition: color 0.3s;
            display: inline-block;
        }

        .links-section ul li a:hover {
            color: #2980b9;
            text-decoration: underline;
        }

        .links-section ul li a:before {
            content: "→ ";
            margin-right: 5px;
        }

        footer {
            background-color: #2c3e50;
            color: #ecf0f1;
            padding: 30px 0;
            margin-top: 50px;
        }

        footer .container {
            text-align: center;
        }

        footer p {
            margin-bottom: 10px;
        }

        footer nav {
            background-color: transparent;
        }

        footer nav ul {
            justify-content: center;
            padding: 0;
        }

        footer nav ul li a {
            padding: 10px 15px;
            font-size: 14px;
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 28px;
            }

            .header-top .container {
                flex-direction: column;
                gap: 15px;
            }

            nav ul {
                flex-direction: column;
            }

            nav ul li a {
                padding: 12px 15px;
            }

            .links-section ul {
                column-count: 1;
            }

            article h2 {
                font-size: 24px;
            }

            article h3 {
                font-size: 20px;
            }

            main {
                padding: 30px 15px;
                margin: 15px;
            }

            .transition-section {
                padding: 20px;
            }

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

            footer nav ul {
                flex-direction: column;
            }
        }

        @media (max-width: 480px) {
            h1 {
                font-size: 24px;
            }

            article h2 {
                font-size: 20px;
            }

            article h3 {
                font-size: 18px;
            }

            article p {
                font-size: 15px;
            }

            .logo {
                font-size: 20px;
            }
        }