body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
    color: #333;
}

header {
    background-color: #333;
    padding: 15px;
    text-align: center;
}

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

header nav ul li {
    display: inline;
    margin-right: 15px;
}

header nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 16px;
}

main {
    padding: 20px;
    max-width: 800px;
    margin: auto;
    background: white;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
    border-radius: 5px;
}

footer {
    background-color: #444;
    text-align: left;
    padding: 15px 20px;
    width: 100%;
    font-size: 14px;
    color: white;
    margin-top: 30px;
}

footer a {
    color: white;
    text-decoration: none;
    margin-right: 15px;
}

footer a:hover {
    text-decoration: underline;
}