body {
    background-color: #f4faff;
    font-family: Arial, sans-serif;
    color: #222;
    margin: 0;
    padding: 0;
}

header {
    background-color: #cce0ff;
    text-align: center;
    padding: 1rem;
    border-bottom: 3px solid #3399ff;
}

nav ul {
    list-style: none;
    background-color: #e6f0ff;
    display: flex;
    justify-content: center;
    padding: 0.5rem;
    flex-wrap: wrap;
}

nav ul li {
    margin: 0.5rem 1rem;
}

nav ul li a {
    text-decoration: none;
    color: #003366;
    font-weight: bold;
}

section {
    margin: 1rem auto;
    max-width: 800px;
    padding: 1rem;
    background-color: #ffffff;
    border: 1px solid #99ccff;
    border-radius: 8px;
}

pre {
    background-color: #f0f8ff;
    padding: 1rem;
    overflow-x: auto;
    font-family: monospace;
    color: #003366;
}

footer {
    background-color: #cce0ff;
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
}