body {
    font-family: sans-serif;
    max-width: 800px;
    margin: auto;
    padding: 2rem;
    line-height: 1.6;
    background-color: #fafafa;
    color: #222;
}

header {
    border-bottom: 1px solid #ccc;
    margin-bottom: 2rem;
}

header h1 {
    margin: 0;
}

nav a {
    text-decoration: none;
    color: #0077cc;
    margin-right: 1rem;
}

footer {
    border-top: 1px solid #ccc;
    margin-top: 2rem;
    font-size: 0.9rem;
    color: #555;
}

.mono {
    font-family: monospace;
    white-space: pre;
    line-height: 1;
    padding: 20px;
}