body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f3f3f3;
    color: #222;
}

header, footer {
    background: #1d428a;
    color: #fff;
    padding: 1em 0;
    text-align: center;
}

nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    padding: 0;
    margin: 0;
    background: #fff;
}

nav ul li {
    margin: 0 0.5em;
}

nav ul li a {
    text-decoration: none;
    color: #1d428a;
    padding: 0.5em 1em;
}

main {
    padding: 2em;
    max-width: 800px;
    margin: auto;
    background: #fff;
}

figure {
    margin: 2em 0;
    text-align: center;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

figcaption {
    margin-top: 0.5em;
    font-size: 0.9em;
    color: #555;
}

/* Responsive Design: For screens under 600px */
@media (max-width: 600px) {
    nav ul {
        flex-direction: column;
    }

    main {
        padding: 1em;
    }
}