body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

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

header, nav, main, footer {
    padding: 20px;
    margin-bottom: 20px;
}

h1, h2 {
    color: #333;
}

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

nav ul li {
    display: inline;
    margin-right: 10px;
}

nav ul li a {
    text-decoration: none;
    color: #007BFF;
    padding: 5px 10px;
    border: 1px solid #007BFF;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

nav ul li a:hover {
    background-color: #007BFF;
    color: #fff;
}

footer {
    text-align: center;
    padding: 10px 0;
    background-color: #333;
    color: #fff;
}