body {
    font-family: system-ui, sans-serif;
    margin: 2em;
    background-color: #fdfdfd;
    color: #333;
}

header, footer {
    background-color: #eee;
    padding: 1em;
    border-radius: 8px;
}

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

nav li {
    display: inline;
    margin-right: 1em;
}

h1, h2 {
    color: #005577;
}

img {
    max-width: 100%;
    height: auto;
    border: 1px solid #ccc;
    margin: 1em 0;
}