body {
    display: flex;
    flex-direction: column;
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: #f4f4f4;
}

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

nav a {
    color: #fff;
    text-decoration: none;
    margin: 0 1rem;
}

main {
    flex: 1;
    padding: 1rem;
}

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