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

        body {
            font-family: Verdana, Arial, sans-serif;
            font-size: 14px;
            line-height: 1.6;
            color: #333;
            background: #f8f8f8;
        }

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

        header {
            background: #2c3e50;
            color: white;
            padding: 20px 0;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        h1 {
            font-size: 2.5em;
            font-weight: bold;
            text-align: center;
            margin: 0;
        }

        .language-selector {
            text-align: center;
            margin-top: 15px;
        }

        .language-selector a {
            display: inline-block;
            margin: 0 5px;
            padding: 5px 10px;
            background: rgba(255,255,255,0.1);
            color: white;
            text-decoration: none;
            border-radius: 3px;
            font-size: 12px;
            transition: background 0.3s;
        }

        .language-selector a:hover,
        .language-selector .active {
            background: rgba(255,255,255,0.2);
        }

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

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

        nav li {
            position: relative;
        }

        nav a {
            display: block;
            padding: 15px 20px;
            color: white;
            text-decoration: none;
            transition: background 0.3s;
            font-size: 13px;
        }

        nav a:hover,
        nav .current {
            background: #2c3e50;
        }

        main {
            background: white;
            margin: 30px 0;
            padding: 40px 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            border-radius: 8px;
        }

        article {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 30px;
            line-height: 1.8;
        }

        article p {
            margin-bottom: 20px;
            text-align: justify;
        }

        article h2, article h3, article h4 {
            color: #2c3e50;
            margin: 30px 0 15px 0;
        }

        article h2 {
            font-size: 1.8em;
            border-bottom: 2px solid #34495e;
            padding-bottom: 10px;
        }

        article h3 {
            font-size: 1.4em;
        }

        article h4 {
            font-size: 1.2em;
        }

        .transition-section {
            max-width: 800px;
            margin: 40px auto 0 auto;
            padding: 0 30px;
            border-top: 1px solid #eee;
            padding-top: 30px;
        }

        .transition-section p {
            margin-bottom: 20px;
            text-align: justify;
            line-height: 1.8;
        }

        .links-section {
            background: #f9f9f9;
            padding: 40px 0;
            margin-top: 40px;
            border-top: 3px solid #34495e;
        }

        .links-section h3 {
            color: #2c3e50;
            font-size: 1.4em;
            margin: 30px 0 20px 0;
            padding-bottom: 10px;
            border-bottom: 1px solid #ddd;
        }

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

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px 30px;
            margin-bottom: 30px;
        }

        .links-section li {
            margin-bottom: 8px;
        }

        .links-section a {
            color: #3498db;
            text-decoration: none;
            display: block;
            padding: 8px 0;
            transition: color 0.3s;
            border-left: 3px solid transparent;
            padding-left: 15px;
        }

        .links-section a:hover {
            color: #2980b9;
            border-left-color: #3498db;
            background: rgba(52, 152, 219, 0.05);
        }

        footer {
            background: #2c3e50;
            color: white;
            padding: 30px 0;
            text-align: center;
        }

        .footer-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .footer-left,
        .footer-right {
            flex: 1;
        }

        .footer-left {
            text-align: left;
        }

        .footer-right {
            text-align: right;
        }

        .footer-right a {
            color: #bdc3c7;
            text-decoration: none;
            margin: 0 5px;
        }

        .footer-right a:hover {
            color: white;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .container {
                padding: 0 15px;
            }

            h1 {
                font-size: 2em;
            }

            nav ul {
                flex-direction: column;
            }

            nav a {
                padding: 12px 20px;
            }

            article,
            .transition-section {
                padding: 0 20px;
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 5px;
            }

            .footer-content {
                flex-direction: column;
                text-align: center;
            }

            .footer-left,
            .footer-right {
                text-align: center;
            }
        }

        @media (max-width: 480px) {
            h1 {
                font-size: 1.5em;
            }

            article,
            .transition-section {
                padding: 0 15px;
            }

            nav a {
                padding: 10px 15px;
                font-size: 12px;
            }

            main {
                margin: 20px 0;
                padding: 20px 0;
            }
        }