body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            margin: 0;
            padding: 20px;
            background-color: #f8f9fa;
            color: #343a40;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
        }
        .container {
            max-width: 900px;
            width: 100%;
            margin: auto;
            background: #fff;
            padding: 40px;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            box-sizing: border-box;
        }
        h1 {
            color: #0056b3;
            text-align: center;
            margin-bottom: 30px;
            font-size: 2.5em;
            position: relative;
        }
        h1::after {
            content: '';
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            bottom: -10px;
            width: 80px;
            height: 3px;
            background-color: #007bff;
            border-radius: 2px;
        }
        h2 {
            color: #007bff;
            margin-top: 30px;
            margin-bottom: 15px;
            font-size: 1.8em;
            border-bottom: 1px solid #e9ecef;
            padding-bottom: 8px;
        }
        p {
            margin-bottom: 25px;
            color: #555;
            text-align: center;
            font-size: 1.1em;
        }
        ul {
            list-style: none;
            padding: 0;
            margin-bottom: 20px;
        }
        li {
            margin-bottom: 8px;
        }
        li a {
            text-decoration: none;
            color: #007bff;
            font-weight: 600;
            padding: 5px 0;
            display: inline-block;
            transition: color 0.3s ease-in-out, transform 0.2s ease-in-out;
        }
        li a:hover {
            color: #0056b3;
            text-decoration: underline;
            transform: translateX(3px);
        }
        ul ul {
            margin-left: 25px;
            border-left: 3px solid #dee2e6;
            padding-left: 15px;
            margin-top: 8px;
        }
        ul ul li a {
            font-weight: normal;
            color: #212529;
        }
        ul ul li a:hover {
            color: #0056b3;
        }

        @media (max-width: 768px) {
            .container {
                padding: 25px;
            }
            h1 {
                font-size: 2em;
            }
            h2 {
                font-size: 1.5em;
            }
        }