body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background-color: #f8f9fa;
    padding: 10px 20px;
    border-bottom: 1px solid #ddd;
}

h1 {
    margin: 0;
}

nav ul {
    list-style: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin-right: 10px;
}

nav ul li a {
    text-decoration: none;
    color: #007bff;
}

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

main {
    padding: 20px;
}

pre {
    background-color: #f8f9fa;
    padding: 10px;
    border: 1px solid #ddd;
    overflow-x: auto;
}

footer {
    text-align: center;
    padding: 10px;
    background-color: #f8f9fa;
    border-top: 1px solid #ddd;
    position: fixed;
    width: 100%;
    bottom: 0;
}