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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(to bottom, #d5d5d5 0%, #bfbfbf 100%);
            color: #333;
            line-height: 1.6;
            min-height: 100vh;
        }

        .container {
            max-width: 1000px;
            margin: 0 auto;
            background: #fff;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
        }

        header {
            background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
            padding: 30px 20px;
            text-align: center;
            border-bottom: 4px solid #2c5f8d;
        }

        header h1 {
            color: #fff;
            font-size: 2.5em;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
            margin-bottom: 10px;
        }

        nav {
            background: #555;
            padding: 0;
            border-bottom: 3px solid #357abd;
        }

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

        nav ul li {
            padding: 0;
        }

        nav ul li a {
            display: block;
            color: #fff;
            text-decoration: none;
            padding: 12px 15px;
            font-weight: bold;
            font-size: 0.9em;
            transition: background 0.3s;
        }

        nav ul li a:hover {
            background: #4a90e2;
        }

        nav ul li:not(:last-child)::after {
            content: "°";
            color: #aaa;
            padding: 0 5px;
        }

        main {
            padding: 30px 20px;
            background: #fff;
        }

        article {
            margin-bottom: 40px;
        }

        article h2, article h3, article h4 {
            color: #357abd;
            margin: 25px 0 15px 0;
        }

        article h2 {
            font-size: 2em;
            border-bottom: 2px solid #4a90e2;
            padding-bottom: 10px;
        }

        article h3 {
            font-size: 1.5em;
        }

        article h4 {
            font-size: 1.2em;
        }

        article p {
            margin-bottom: 15px;
            text-align: justify;
        }

        .transition-section {
            background: linear-gradient(to right, #f5f5f5, #e8e8e8);
            padding: 25px;
            margin: 30px 0;
            border-left: 5px solid #4a90e2;
            border-radius: 5px;
        }

        .transition-section p {
            margin-bottom: 15px;
        }

        {% if links %}
        .links-section {
            background: #f9f9f9;
            padding: 30px 20px;
            border-top: 3px solid #4a90e2;
            border-bottom: 3px solid #4a90e2;
            margin: 30px 0;
        }

        .links-section h3 {
            color: #357abd;
            font-size: 1.4em;
            margin: 25px 0 15px 0;
            padding-bottom: 10px;
            border-bottom: 2px solid #ddd;
        }

        .links-section ul {
            list-style: none;
            column-count: 2;
            column-gap: 30px;
            margin-bottom: 20px;
        }

        .links-section ul li {
            break-inside: avoid;
            margin-bottom: 10px;
        }

        .links-section ul li a {
            color: #357abd;
            text-decoration: none;
            padding: 5px 0;
            display: inline-block;
            transition: color 0.3s, padding-left 0.3s;
        }

        .links-section ul li a:hover {
            color: #4a90e2;
            padding-left: 10px;
        }

        .links-section ul li a::before {
            content: "▸ ";
            color: #4a90e2;
        }
        {% endif %}

        footer {
            background: #555;
            color: #fff;
            text-align: center;
            padding: 20px;
            border-top: 4px solid #357abd;
        }

        @media (max-width: 768px) {
            header h1 {
                font-size: 1.8em;
            }

            nav ul {
                flex-direction: column;
            }

            nav ul li {
                width: 100%;
                text-align: center;
            }

            nav ul li:not(:last-child)::after {
                display: none;
            }

            nav ul li a {
                border-bottom: 1px solid #666;
            }

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

            article h2 {
                font-size: 1.5em;
            }
        }

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

            main {
                padding: 20px 15px;
            }

            .transition-section {
                padding: 15px;
            }

            .links-section {
                padding: 20px 15px;
            }
        }