body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            background-color: #f9f9f9;
            color: #333;
            padding: 20px;
        }

        h1, h2, h3 {
            color: #222;
        }

        h1 {
            font-size: 2em;
            border-bottom: 2px solid #ccc;
            padding-bottom: 10px;
            margin-bottom: 30px;
        }

        h2 {
            font-size: 1.5em;
            margin-top: 30px;
        }

        p, li {
            margin: 10px 0;
        }

        ul.toc {
            list-style: none;
            padding: 0;
            margin-bottom: 30px;
        }

        ul.toc li {
            margin: 5px 0;
        }

        ul.toc li a {
            color: #0056b3;
            text-decoration: none;
        }

        ul.toc li a:hover {
            text-decoration: underline;
        }

        section {
            margin-bottom: 40px;
        }

        footer {
            background-color: #333;
            color: white;
            padding: 10px 0;
            text-align: center;
        }

        .contact {
            margin: 0;
        }

        .contact-list {
            font-family: Arial, sans-serif;
            font-size: 16px;
            text-align: center;
        }

        .contact-list a {
            color: #333;
            text-decoration: none;
            font-weight: bold;
            transition: color 0.3s ease;
            margin: 15px;
        }

        .contact-list a:hover {
            color: #ff9800;
        }

        #scrollToTopBtn {
            position: fixed;
            bottom: 40px;
            right: 40px;
            z-index: 100;
            background-color: #333;
            color: #ff9800;
            border: none;
            padding: 14px 18px;
            border-radius: 50%;
            font-size: 24px;
            cursor: pointer;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
            display: none;
            transition: background-color 0.3s ease, transform 0.3s ease;
        }

        #scrollToTopBtn:hover {
            background-color: #555;
            transform: translateY(-2px);
        }