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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f5f5;
        }

        .header {
            background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

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

        .logo {
            font-size: 1.5rem;
            font-weight: bold;
            color: white;
            text-decoration: none;
        }

        .navbar {
            background-color: #34495e;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

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

        .navbar ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            padding: 0;
            margin: 0;
        }

        .navbar li {
            position: relative;
        }

        .navbar a {
            display: block;
            color: white;
            text-decoration: none;
            padding: 1rem 1.2rem;
            transition: background-color 0.3s;
        }

        .navbar a:hover {
            background-color: #2c3e50;
        }

        .dropdown {
            position: relative;
        }

        .dropdown-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            background-color: #34495e;
            min-width: 200px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
            z-index: 1000;
        }

        .dropdown:hover .dropdown-menu {
            display: block;
        }

        .dropdown-menu li {
            width: 100%;
        }

        .dropdown-menu a {
            padding: 0.8rem 1.2rem;
        }

        .dropdown-menu a:hover {
            background-color: #2c3e50;
        }

        .main-container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 20px;
        }

        h1 {
            color: #2c3e50;
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #3498db;
        }

        article {
            background-color: white;
            padding: 2rem;
            margin-bottom: 2rem;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        article h2 {
            color: #2c3e50;
            margin-top: 1.5rem;
            margin-bottom: 1rem;
            font-size: 1.8rem;
        }

        article h3 {
            color: #34495e;
            margin-top: 1.2rem;
            margin-bottom: 0.8rem;
            font-size: 1.4rem;
        }

        article h4 {
            color: #34495e;
            margin-top: 1rem;
            margin-bottom: 0.6rem;
            font-size: 1.2rem;
        }

        article p {
            margin-bottom: 1rem;
            text-align: justify;
        }

        .transition-section {
            background-color: white;
            padding: 2rem;
            margin-bottom: 2rem;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

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

        .links-section {
            background-color: white;
            padding: 2rem;
            margin-bottom: 2rem;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        .links-section h3 {
            color: #2c3e50;
            margin-top: 1.5rem;
            margin-bottom: 1rem;
            font-size: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #3498db;
        }

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

        .links-section ul {
            list-style: none;
            column-count: 2;
            column-gap: 2rem;
            margin-bottom: 1.5rem;
        }

        .links-section li {
            break-inside: avoid;
            margin-bottom: 0.5rem;
        }

        .links-section a {
            color: #3498db;
            text-decoration: none;
            transition: color 0.3s;
            display: inline-block;
            padding: 0.3rem 0;
        }

        .links-section a:hover {
            color: #2c3e50;
            text-decoration: underline;
        }

        .links-section a::before {
            content: "→ ";
            color: #3498db;
        }

        .footer {
            background-color: #2c3e50;
            color: white;
            padding: 2rem 0;
            margin-top: 3rem;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            text-align: center;
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }

            .navbar ul {
                flex-direction: column;
            }

            .navbar li {
                width: 100%;
            }

            .dropdown-menu {
                position: static;
                display: none;
                box-shadow: none;
            }

            .dropdown.active .dropdown-menu {
                display: block;
            }

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

            article {
                padding: 1.5rem;
            }

            .transition-section {
                padding: 1.5rem;
            }

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

        @media (max-width: 480px) {
            h1 {
                font-size: 1.6rem;
            }

            article h2 {
                font-size: 1.5rem;
            }

            article h3 {
                font-size: 1.2rem;
            }

            .navbar a {
                padding: 0.8rem 1rem;
            }
        }