body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f2f2f2;
}

header {
    background-color: #333;
    color: white;
    padding: 20px;
    text-align: center;
}

.menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    background-color: #444;
}

.menu li {
    margin: 0 15px;
}

.menu li a {
    color: white;
    text-decoration: none;
    padding: 10px;
    display: block;
}

.menu li a:hover {
    background-color: #666;
}

main {
    padding: 20px;
}

footer {
    background-color: #222;
    color: white;
    text-align: center;
    padding: 15px;
}