body {
    margin: 0;
    font-family: Arial, sans-serif;
    text-align: center;
}

nav {
    background-color: #222;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 10px;
}

nav li {
    display: inline;
    margin: 0 15px;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 5px 10px;
}

nav a:hover {
    background-color: #555;
}

main {
    margin-top: 40px;
}

img {
    width: 300px;
}