body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

header {
    position: absolute;
    top: 0;
    text-align: center;
}

footer {
    position: absolute;
    width: 100%;
    bottom: 0;
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px 0;
    font-size: 14px;
}

.container {
    text-align: center;
    background-color: white;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

.link,
.link:visited {
    background-color: #4CAF50;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    box-shadow: none;
    width: 100%;
    border: none;
    font-size: 20px;
    cursor: pointer;
    padding: 10px;
}

.footer-link:visited {
    text-decoration: none;
    color: white;
}