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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: #000000;
            background-color: #FFFFFF;
            padding: 20px;
        }

        h1 {
            color: #000000;
            font-size: 2.5rem;
            margin: 2rem 0;
            padding-bottom: 1rem;
            border-bottom: 3px solid #0000EF;
            text-align: center;
        }

        article {
            max-width: 900px;
            margin: 0 auto 3rem;
            padding: 2rem;
            background: #f8f9fa;
            border-left: 4px solid #0000EF;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        }

        article h2 {
            color: #0000EF;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-size: 1.8rem;
        }

        article h3 {
            color: #55188A;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
            font-size: 1.4rem;
        }

        article h4 {
            color: #000000;
            margin-top: 1.2rem;
            margin-bottom: 0.6rem;
            font-size: 1.2rem;
        }

        article p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }

        article ul, article ol {
            margin-left: 2rem;
            margin-bottom: 1.2rem;
        }

        article li {
            margin-bottom: 0.5rem;
        }

        article blockquote {
            margin: 1.5rem 0;
            padding: 1rem 1.5rem;
            background: #ffffff;
            border-left: 4px solid #55188A;
            font-style: italic;
        }

        article code, article tt {
            background: #e9ecef;
            padding: 2px 6px;
            border-radius: 3px;
            font-family: "Courier New", Courier, monospace;
            font-size: 0.9em;
        }

        article a {
            color: #0000EF;
            text-decoration: none;
            border-bottom: 1px solid transparent;
            transition: border-bottom 0.3s ease;
        }

        article a:visited {
            color: #55188A;
        }

        article a:hover {
            border-bottom: 1px solid #0000EF;
        }

        article a:active {
            color: #FF0000;
        }

        section, div.transition {
            max-width: 900px;
            margin: 0 auto 3rem;
            padding: 2rem;
        }

        section p, div.transition p {
            margin-bottom: 1.2rem;
            font-size: 1.1rem;
            text-align: justify;
        }

        .links-section {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-top: 3px solid #0000EF;
            border-bottom: 3px solid #0000EF;
        }

        .links-section h2 {
            color: #0000EF;
            font-size: 2rem;
            margin-bottom: 2rem;
            text-align: center;
        }

        .links-section h3 {
            color: #55188A;
            font-size: 1.5rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #55188A;
        }

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

        .links-section li {
            padding-left: 1.5rem;
            position: relative;
        }

        .links-section li:before {
            content: "▸";
            position: absolute;
            left: 0;
            color: #0000EF;
            font-weight: bold;
        }

        .links-section a {
            color: #0000EF;
            text-decoration: none;
            transition: color 0.3s ease, padding-left 0.3s ease;
            display: inline-block;
        }

        .links-section a:visited {
            color: #55188A;
        }

        .links-section a:hover {
            color: #FF0000;
            padding-left: 5px;
        }

        @media (max-width: 768px) {
            body {
                padding: 10px;
            }

            h1 {
                font-size: 1.8rem;
                margin: 1rem 0;
            }

            article {
                padding: 1.5rem;
            }

            article h2 {
                font-size: 1.5rem;
            }

            article h3 {
                font-size: 1.2rem;
            }

            section, div.transition {
                padding: 1.5rem;
            }

            .links-section {
                padding: 1.5rem;
            }

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

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

            .links-section h3 {
                font-size: 1.2rem;
            }
        }

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

            article {
                padding: 1rem;
            }

            section, div.transition {
                padding: 1rem;
            }

            .links-section {
                padding: 1rem;
            }

            article ul, article ol {
                margin-left: 1.2rem;
            }
        }