body {
    font-family: sans-serif;
    margin: 20px;
    background-color: #f4f4f4;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

header h1 {
    color: navy;
    text-align: center;
    margin-bottom: 20px;
}

main {
    line-height: 1.6;
}

footer {
    text-align: center;
    margin-top: 20px;
    color: #777;
    font-size: 0.9em;
}