body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f7f7f7;
    color: #333;
}

header {
    background-color: #0073e6;
    color: white;
    padding: 20px 0;
    text-align: center;
}

main {
    padding: 20px;
    max-width: 800px;
    margin: auto;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1, h2 {
    color: #004080;
}

ul, ol {
    margin-left: 20px;
}

a {
    color: #0073e6;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

footer {
    text-align: center;
    padding: 15px;
    background-color: #eee;
    font-size: 0.9em;
}