body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #2d56ac;
}

header {
    background-color: #000000;
    color: white;
    text-align: center;
    padding: 1em 0;
}

nav {
    text-align: center;
    margin: 2em 0;
}

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

nav li {
    display: inline;
    margin: 0 15px;
}

nav a {
    text-decoration: none;
    color: #4CAF50;
}

footer {
    text-align: center;
    margin: 2em 0;
}