body {
            font-family: Arial, sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            height: 100vh;
            margin: 0;
            background-color: #f0f0f0;
            text-align: center;
        }
        h1 {
            font-size: 3em;
            margin-bottom: 20px;
        }
        h2 {
            font-size: 2em;
            margin: 20px 0 10px 0;
        }
        a {
            font-size: 1.5em;
            margin: 5px 0;
            text-decoration: none;
            color: #007BFF;
        }
        a:hover {
            text-decoration: underline;
        }
        hr {
            width: 80%;
            margin: 40px 0;
        }
        .footer {
            font-size: 1.2em;
            margin-top: 20px;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.5em;
            }
            h2 {
                font-size: 1.8em;
            }
            a {
                font-size: 1.3em;
            }
            .footer {
                font-size: 1em;
            }
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 2em;
            }
            h2 {
                font-size: 1.5em;
            }
            a {
                font-size: 1.1em;
            }
            .footer {
                font-size: 0.9em;
            }
        }