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

#page {
    max-width: 1000px;
    margin: auto;
    padding: 20px;
}

header {
    border-bottom: 2px solid #000;
    margin-bottom: 20px;
}

nav a {
    margin-right: 20px;
    text-decoration: none;
    color: black;
}

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

main img {
    max-width: 100%;
    height: auto;
}

footer {
    margin-top: 40px;
    border-top: 1px solid #000;
    padding-top: 10px;
    font-size: 12px;
}