body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    font-family: 'Roboto', sans-serif;
    font-size: 2em;
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
}

header h1 {
    color: #333;
}

nav {
    line-height: 2;
}

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

nav ul a {
    text-decoration: none;
    color: #333;
}

main {
    margin: 20px 0;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    width: 100%;
    bottom: 0;
}