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

header {
    background-color: #333;
    color: white;
    padding: 1rem;
}

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

nav ul li {
    display: inline;
    margin-right: 1rem;
}

nav ul li a {
    text-decoration: none;
}

main {
    display: flex;
}

#posts {
    flex: 1;
    padding: 1rem;
}