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


nav {
    background-color: darkred;
    text-align: center;
    padding: 10px;
}

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

nav a:hover {
    color: yellow;
}


main {
    padding: 20px;
}

main img {
    width: 100%;
    max-width: 600px;
    display: block;
    margin: 10px auto;
}


footer {
    background-color: darkgreen;
    color: white;
    text-align: center;
    padding: 10px;
}


@media (max-width: 768px) {
    nav a {
        display: block;
        margin: 10px 0;
    }

    .banner-text h1 {
        font-size: 24px;
    }
}