* {
            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: #2c3e50;
            background-color: #f8f9fa;
        }

        header {
            background-color: #1a1a2e;
            padding: 1.5rem 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

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

        .logo {
            color: #ffffff;
            font-size: 1.8rem;
            font-weight: 700;
            text-decoration: none;
            letter-spacing: 1px;
        }

        nav {
            background-color: #16213e;
            padding: 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

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

        nav ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            padding: 1rem 0;
        }

        nav a {
            color: #e8e8e8;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s ease;
            padding: 0.5rem 0;
        }

        nav a:hover {
            color: #4a90e2;
        }

        main {
            max-width: 1200px;
            margin: 0 auto;
            padding: 3rem 2rem;
        }

        h1 {
            color: #1a1a2e;
            font-size: 2.5rem;
            margin-bottom: 2rem;
            font-weight: 700;
            line-height: 1.2;
        }

        article {
            background-color: #ffffff;
            padding: 2.5rem;
            margin-bottom: 2.5rem;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
        }

        article h2 {
            color: #1a1a2e;
            font-size: 1.8rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 600;
        }

        article h3 {
            color: #2c3e50;
            font-size: 1.4rem;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
            font-weight: 600;
        }

        article h4 {
            color: #2c3e50;
            font-size: 1.2rem;
            margin-top: 1.2rem;
            margin-bottom: 0.6rem;
            font-weight: 600;
        }

        article p {
            margin-bottom: 1.2rem;
            color: #4a5568;
            font-size: 1.05rem;
        }

        .transition-content {
            background-color: #ffffff;
            padding: 2rem;
            margin-bottom: 2.5rem;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
        }

        .transition-content p {
            color: #4a5568;
            font-size: 1.05rem;
            margin-bottom: 1rem;
        }

        .links-section {
            background-color: #ffffff;
            padding: 2.5rem;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
            margin-bottom: 2.5rem;
        }

        .links-section h2 {
            color: #1a1a2e;
            font-size: 1.8rem;
            margin-bottom: 1.5rem;
            font-weight: 600;
        }

        .links-section h3 {
            color: #16213e;
            font-size: 1.3rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 600;
        }

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 0.8rem 2rem;
            margin-bottom: 1.5rem;
        }

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

        .links-section a {
            color: #4a90e2;
            text-decoration: none;
            font-size: 1rem;
            transition: color 0.3s ease;
            display: inline-block;
        }

        .links-section a:hover {
            color: #2c5aa0;
            text-decoration: underline;
        }

        footer {
            background-color: #1a1a2e;
            color: #e8e8e8;
            padding: 2rem 0;
            margin-top: 4rem;
        }

        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            text-align: center;
        }

        footer p {
            margin: 0.5rem 0;
            font-size: 0.95rem;
        }

        @media (max-width: 768px) {
            .header-container,
            .nav-container,
            main,
            .footer-container {
                padding: 0 1.5rem;
            }

            h1 {
                font-size: 2rem;
            }

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

            article h2 {
                font-size: 1.5rem;
            }

            article h3 {
                font-size: 1.2rem;
            }

            nav ul {
                gap: 1.5rem;
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 0.6rem;
            }
        }

        @media (max-width: 480px) {
            .header-container,
            .nav-container,
            main,
            .footer-container {
                padding: 0 1rem;
            }

            .logo {
                font-size: 1.5rem;
            }

            h1 {
                font-size: 1.7rem;
            }

            article,
            .transition-content,
            .links-section {
                padding: 1.2rem;
            }

            nav ul {
                gap: 1rem;
                flex-direction: column;
            }

            nav a {
                display: block;
            }
        }