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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }

        header {
            background-color: #2c3e50;
            color: white;
            padding: 1rem 0;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        .header-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: white;
            text-decoration: none;
        }

        nav ul {
            list-style: none;
            display: flex;
            gap: 2rem;
        }

        nav a {
            color: white;
            text-decoration: none;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: background-color 0.3s ease;
        }

        nav a:hover {
            background-color: rgba(255,255,255,0.1);
        }

        main {
            max-width: 1200px;
            margin: 0 auto;
            padding: 3rem 2rem;
            background-color: white;
            min-height: calc(100vh - 200px);
            border-radius: 8px;
            margin-top: 2rem;
            margin-bottom: 2rem;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        h1 {
            color: #2c3e50;
            font-size: 2.5rem;
            margin-bottom: 2rem;
            border-bottom: 3px solid #3498db;
            padding-bottom: 1rem;
        }

        article {
            margin-bottom: 3rem;
        }

        article h2 {
            color: #2c3e50;
            font-size: 2rem;
            margin: 2rem 0 1rem 0;
        }

        article h3 {
            color: #2c3e50;
            font-size: 1.5rem;
            margin: 1.5rem 0 1rem 0;
        }

        article h4 {
            color: #2c3e50;
            font-size: 1.3rem;
            margin: 1.2rem 0 0.8rem 0;
        }

        article p {
            margin-bottom: 1.5rem;
            color: #555;
            text-align: justify;
        }

        .transition-section {
            margin: 3rem 0;
            padding: 2rem;
            background-color: #ecf0f1;
            border-radius: 6px;
        }

        .transition-section p {
            color: #555;
            margin-bottom: 1rem;
        }

        .links-section {
            background-color: #f8f9fa;
            padding: 2rem;
            border-radius: 8px;
            border-left: 4px solid #3498db;
        }

        .links-section h3 {
            color: #2c3e50;
            font-size: 1.4rem;
            margin-bottom: 1rem;
            margin-top: 2rem;
        }

        .links-section h3:first-child {
            margin-top: 0;
        }

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 0.8rem;
            margin-bottom: 2rem;
        }

        .links-section li {
            background-color: white;
            border-radius: 4px;
            transition: transform 0.2s ease;
        }

        .links-section li:hover {
            transform: translateX(5px);
        }

        .links-section a {
            display: block;
            padding: 0.8rem 1rem;
            color: #3498db;
            text-decoration: none;
            border-radius: 4px;
            transition: color 0.3s ease;
        }

        .links-section a:hover {
            color: #2c3e50;
            background-color: #ecf0f1;
        }

        footer {
            background-color: #2c3e50;
            color: white;
            text-align: center;
            padding: 2rem 0;
            margin-top: auto;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                gap: 1rem;
            }

            nav ul {
                flex-wrap: wrap;
                justify-content: center;
                gap: 1rem;
            }

            main {
                margin: 1rem;
                padding: 2rem 1rem;
            }

            h1 {
                font-size: 2rem;
            }

            .links-section ul {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .header-content {
                padding: 0 1rem;
            }

            main {
                margin: 0.5rem;
                padding: 1.5rem 1rem;
            }

            h1 {
                font-size: 1.8rem;
            }

            .transition-section,
            .links-section {
                padding: 1.5rem;
            }
        }