body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f2f2f2;
}

header, footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 20px 0;
}

nav {
    background-color: #444;
    text-align: center;
    padding: 10px 0;
}

nav a {
    color: #fff;
    text-decoration: none;
    margin: 0 15px;
    font-weight: bold;
}

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

main {
    padding: 20px;
    text-align: center;
}

main img {
    max-width: 80%;
    height: auto;
    border-radius: 10px;
}