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

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

h1 {
    margin: 0;
    color: white;
}

nav {
    background-color: #555;
    text-align: center;
    padding: 10px;
}

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

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

nav ul li a {
    color: white;
    text-decoration: none;
}

main {
    padding: 20px;
}

section h2 {
    color: black;
}

img {
    width: 100%;
    max-width: 600px;
    display: block;
    margin: 20px auto;
}

.caption {
    text-align: center;
    font-style: italic;
    color: #555;
}

ul {
    list-style-type: disc;
    padding-left: 40px;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px;
    position: fixed;
    width: 100%;
    bottom: 0;
}