* {
            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: #333;
            background-color: #f5f5f5;
        }

        header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: #fff;
            padding: 2rem 1rem;
            text-align: center;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        h1 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
        }

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

        article {
            background: #fff;
            margin: 2rem auto;
            padding: 2.5rem;
            max-width: 900px;
            box-shadow: 0 0 20px rgba(0,0,0,0.08);
            border-radius: 8px;
        }

        article h2 {
            color: #667eea;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-size: 1.8rem;
            font-weight: 600;
            border-bottom: 3px solid #667eea;
            padding-bottom: 0.5rem;
        }

        article h3 {
            color: #764ba2;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
            font-size: 1.4rem;
            font-weight: 600;
        }

        article p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
            line-height: 1.8;
            color: #555;
        }

        article strong {
            color: #333;
            font-weight: 600;
        }

        article ul {
            margin: 1rem 0 1.5rem 2rem;
            list-style-type: disc;
        }

        article ul li {
            margin-bottom: 0.5rem;
            line-height: 1.7;
            color: #555;
        }

        .transition-section {
            background: #fff;
            margin: 2rem auto;
            padding: 2rem;
            max-width: 900px;
            box-shadow: 0 0 20px rgba(0,0,0,0.08);
            border-radius: 8px;
            border-left: 4px solid #667eea;
        }

        .transition-section p {
            font-size: 1.05rem;
            line-height: 1.8;
            color: #555;
            margin-bottom: 1rem;
        }

        {% if links %}
        .links-section {
            background: linear-gradient(to bottom, #fff 0%, #f8f9fa 100%);
            margin: 2rem auto;
            padding: 2.5rem;
            max-width: 900px;
            box-shadow: 0 0 20px rgba(0,0,0,0.08);
            border-radius: 8px;
        }

        .links-section h3 {
            color: #667eea;
            font-size: 1.5rem;
            margin-bottom: 1rem;
            font-weight: 600;
        }

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

        .links-section li {
            break-inside: avoid;
            margin-bottom: 0.8rem;
            padding-left: 1.5rem;
            position: relative;
        }

        .links-section li:before {
            content: "→";
            position: absolute;
            left: 0;
            color: #764ba2;
            font-weight: bold;
        }

        .links-section a {
            color: #667eea;
            text-decoration: none;
            transition: color 0.3s ease;
            font-size: 1rem;
        }

        .links-section a:hover {
            color: #764ba2;
            text-decoration: underline;
        }
        {% endif %}

        footer {
            background: #2c3e50;
            color: #ecf0f1;
            text-align: center;
            padding: 1.5rem 1rem;
            margin-top: 3rem;
        }

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

            article {
                padding: 1.5rem;
                margin: 1rem;
            }

            article h2 {
                font-size: 1.5rem;
            }

            article h3 {
                font-size: 1.2rem;
            }

            .transition-section {
                margin: 1rem;
                padding: 1.5rem;
            }

            {% if links %}
            .links-section {
                margin: 1rem;
                padding: 1.5rem;
            }

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

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

            header {
                padding: 1.5rem 0.5rem;
            }

            article {
                padding: 1rem;
            }
        }