body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

header {
    background: #333;
    color: #fff;
    padding: 1em 0;
    text-align: center;
}

header nav a {
    color: #fff;
    text-decoration: none;
    margin: 0 10px;
}

main {
    padding: 2em;
}

footer {
    text-align: center;
    padding: 1em 0;
    background: #333;
    color: #fff;
    position: absolute;
    width: 100%;
    bottom: 0;
}