body {
    font-family: Arial, sans-serif;
    margin: 0;
    background-color: #f4f4f4;
}

header {
    background-color: #2e7d32;
    color: white;
    text-align: center;
    padding: 20px;
}

nav {
    background-color: #1b5e20;
    text-align: center;
    padding: 10px;
}

nav a {
    color: white;
    text-decoration: none;
    margin: 15px;
}

main {
    background-color: white;
    width: 80%;
    margin: 20px auto;
    padding: 20px;
}

img {
    width: 100%;
    max-width: 600px;
    display: block;
    margin: auto;
}

footer {
    background-color: #2e7d32;
    color: white;
    text-align: center;
    padding: 10px;
}