* {
            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;
        }

        #wrap {
            max-width: 100%;
            margin: 0 auto;
        }

        #header_2 {
            background-color: #2c3e50;
            padding: 0;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        #navi {
            max-width: 1200px;
            margin: 0 auto;
        }

        #navi ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            align-items: center;
        }

        #navi li {
            margin: 0;
        }

        #navi a {
            display: block;
            padding: 1.2rem 1.5rem;
            color: #ecf0f1;
            text-decoration: none;
            transition: background-color 0.3s ease, color 0.3s ease;
            font-weight: 500;
        }

        #navi a:hover {
            background-color: #34495e;
            color: #fff;
        }

        #navi .current-menu-item a,
        #navi .current_page_item a {
            background-color: #e74c3c;
            color: #fff;
        }

        #main {
            max-width: 1200px;
            margin: 0 auto;
            padding: 3rem 1.5rem;
        }

        h1 {
            font-size: 2.5rem;
            color: #2c3e50;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 4px solid #e74c3c;
            line-height: 1.3;
        }

        article {
            background: #fff;
            padding: 2.5rem;
            margin-bottom: 3rem;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
        }

        article h2 {
            font-size: 2rem;
            color: #2c3e50;
            margin-top: 2rem;
            margin-bottom: 1rem;
        }

        article h3 {
            font-size: 1.5rem;
            color: #34495e;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
        }

        article h4 {
            font-size: 1.2rem;
            color: #34495e;
            margin-top: 1.2rem;
            margin-bottom: 0.6rem;
        }

        article p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
            color: #555;
            text-align: justify;
        }

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

        article li {
            margin-bottom: 0.5rem;
            color: #555;
        }

        .transition-section {
            background: #fff;
            padding: 2rem;
            margin-bottom: 3rem;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
        }

        .transition-section p {
            font-size: 1.05rem;
            color: #555;
            margin-bottom: 1rem;
            line-height: 1.7;
        }

        {% if links %}
        .links-section {
            background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
            padding: 3rem 2.5rem;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
        }

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

        .links-section h3 {
            font-size: 1.4rem;
            color: #ecf0f1;
            margin-top: 2rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e74c3c;
        }

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

        .links-section li {
            margin: 0;
        }

        .links-section a {
            color: #ecf0f1;
            text-decoration: none;
            transition: color 0.3s ease, padding-left 0.3s ease;
            display: block;
            padding: 0.4rem 0;
            position: relative;
            padding-left: 1.2rem;
        }

        .links-section a:before {
            content: "▸";
            position: absolute;
            left: 0;
            color: #e74c3c;
            transition: left 0.3s ease;
        }

        .links-section a:hover {
            color: #fff;
            padding-left: 1.5rem;
        }

        .links-section a:hover:before {
            left: 0.3rem;
        }
        {% endif %}

        #footer {
            background-color: #2c3e50;
            padding: 2rem 1.5rem;
            margin-top: 4rem;
            text-align: center;
            color: #ecf0f1;
        }

        @media (max-width: 768px) {
            #navi ul {
                flex-direction: column;
            }

            #navi a {
                padding: 1rem;
                width: 100%;
                text-align: center;
                border-bottom: 1px solid #34495e;
            }

            #main {
                padding: 2rem 1rem;
            }

            h1 {
                font-size: 2rem;
            }

            article {
                padding: 1.5rem;
            }

            article h2 {
                font-size: 1.6rem;
            }

            article h3 {
                font-size: 1.3rem;
            }

            .transition-section {
                padding: 1.5rem;
            }

            {% if links %}
            .links-section {
                padding: 2rem 1.5rem;
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 0.5rem;
            }

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

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

            article {
                padding: 1.2rem;
            }

            article p,
            .transition-section p {
                font-size: 1rem;
            }
        }