* {
            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: #f5f5f5;
        }

        header {
            background: #fff;
            border-bottom: 3px solid #000;
            padding: 2rem 1rem;
            margin-bottom: 2rem;
        }

        h1 {
            text-align: center;
            font-size: 2.5rem;
            font-weight: 600;
            letter-spacing: 2px;
            color: #000;
            margin-bottom: 1rem;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
        }

        article {
            background: #fff;
            padding: 2.5rem;
            margin-bottom: 2rem;
            border: 1px solid #ddd;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }

        article h2 {
            color: #000;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-size: 1.8rem;
            border-bottom: 2px solid #c0c0c0;
            padding-bottom: 0.5rem;
        }

        article h3 {
            color: #333;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
            font-size: 1.4rem;
        }

        article h4 {
            color: #444;
            margin-top: 1.2rem;
            margin-bottom: 0.6rem;
            font-size: 1.1rem;
        }

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

        article ul, article ol {
            margin-left: 2rem;
            margin-bottom: 1rem;
        }

        article li {
            margin-bottom: 0.5rem;
        }

        .transition-section {
            background: #fff;
            padding: 2rem 2.5rem;
            margin-bottom: 2rem;
            border: 1px solid #ddd;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }

        .transition-section p {
            margin-bottom: 1rem;
            line-height: 1.8;
        }

        .links-section {
            background: #fff;
            padding: 2.5rem;
            border: 1px solid #ddd;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            margin-bottom: 2rem;
        }

        .links-section h2 {
            color: #fff;
            background: #000;
            padding: 0.8rem 1rem;
            margin: -2.5rem -2.5rem 2rem -2.5rem;
            font-size: 1.3rem;
            text-align: center;
            letter-spacing: 1px;
        }

        .links-section h3 {
            color: #000;
            font-size: 1.2rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #c0c0c0;
        }

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

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 0.5rem 2rem;
            margin-bottom: 2rem;
        }

        .links-section li {
            padding: 0.3rem 0;
        }

        .links-section a {
            color: #0066cc;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        .links-section a:hover {
            color: #ff0000;
            font-weight: bold;
        }

        footer {
            background: #c0c0c0;
            padding: 1.5rem;
            text-align: center;
            margin-top: 3rem;
            border-top: 1px solid #999;
        }

        footer p {
            font-size: 0.85rem;
            color: #333;
            margin-bottom: 0.5rem;
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 1.8rem;
                letter-spacing: 1px;
            }

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

            .links-section h2 {
                margin: -1.5rem -1.5rem 1.5rem -1.5rem;
                font-size: 1.1rem;
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 0.3rem;
            }

            article h2 {
                font-size: 1.5rem;
            }

            article h3 {
                font-size: 1.2rem;
            }
        }

        @media (max-width: 480px) {
            h1 {
                font-size: 1.4rem;
            }

            header {
                padding: 1.5rem 0.5rem;
            }

            article, .transition-section, .links-section {
                padding: 1rem;
            }

            .links-section h2 {
                margin: -1rem -1rem 1rem -1rem;
                padding: 0.6rem 0.5rem;
            }
        }