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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f5f5;
        }

        #inner {
            max-width: 1200px;
            margin: 0 auto;
            background-color: #fff;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
        }

        #nav {
            background-color: #2c3e50;
            padding: 0;
        }

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

        #nav ul li {
            margin: 0;
        }

        #nav ul li a {
            display: block;
            padding: 18px 25px;
            color: #fff;
            text-decoration: none;
            text-transform: lowercase;
            transition: background-color 0.3s ease;
            font-size: 15px;
        }

        #nav ul li a:hover {
            background-color: #34495e;
        }

        #content {
            padding: 50px 40px;
            min-height: 400px;
        }

        h1 {
            font-size: 2.5em;
            color: #2c3e50;
            margin-bottom: 30px;
            line-height: 1.3;
            font-weight: 300;
        }

        article {
            margin-bottom: 40px;
        }

        article h2 {
            font-size: 2em;
            color: #34495e;
            margin: 30px 0 20px;
            font-weight: 400;
        }

        article h3 {
            font-size: 1.5em;
            color: #34495e;
            margin: 25px 0 15px;
            font-weight: 400;
        }

        article p {
            margin-bottom: 20px;
            font-size: 1.1em;
            color: #555;
            text-align: justify;
        }

        .transition-section {
            padding: 30px 40px;
            background-color: #ecf0f1;
            border-top: 3px solid #2c3e50;
        }

        .transition-section p {
            font-size: 1.1em;
            color: #555;
            margin-bottom: 15px;
            text-align: justify;
        }

        .links-section {
            padding: 50px 40px;
            background-color: #fff;
        }

        .links-section h3 {
            font-size: 1.8em;
            color: #2c3e50;
            margin-bottom: 20px;
            margin-top: 30px;
            font-weight: 400;
            border-bottom: 2px solid #ecf0f1;
            padding-bottom: 10px;
        }

        .links-section h3:first-child {
            margin-top: 0;
        }

        .links-section ul {
            list-style: none;
            column-count: 2;
            column-gap: 40px;
            margin-bottom: 30px;
        }

        .links-section ul li {
            margin-bottom: 12px;
            break-inside: avoid;
        }

        .links-section ul li a {
            color: #3498db;
            text-decoration: none;
            font-size: 1.05em;
            transition: color 0.3s ease;
            display: inline-block;
        }

        .links-section ul li a:hover {
            color: #2c3e50;
            text-decoration: underline;
        }

        #footer {
            background-color: #2c3e50;
            color: #ecf0f1;
            padding: 30px 40px;
            margin-top: 0;
        }

        #footer_links {
            text-align: center;
            font-size: 0.95em;
            line-height: 1.8;
        }

        #footer_links a {
            color: #ecf0f1;
            text-decoration: none;
            margin: 0 5px;
            transition: color 0.3s ease;
        }

        #footer_links a:hover {
            color: #3498db;
        }

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

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

            #nav ul li a {
                padding: 15px 20px;
                border-bottom: 1px solid #34495e;
            }

            #content {
                padding: 30px 20px;
            }

            h1 {
                font-size: 2em;
            }

            article h2 {
                font-size: 1.6em;
            }

            article h3 {
                font-size: 1.3em;
            }

            article p {
                font-size: 1em;
            }

            .transition-section {
                padding: 20px 20px;
            }

            .transition-section p {
                font-size: 1em;
            }

            .links-section {
                padding: 30px 20px;
            }

            .links-section h3 {
                font-size: 1.5em;
            }

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

            #footer {
                padding: 20px;
            }

            #footer_links {
                font-size: 0.85em;
            }
        }

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

            #nav ul li a {
                font-size: 14px;
            }

            article p, .transition-section p {
                text-align: left;
            }
        }