body {
    background-image: url('/pics/a-starry-night-sky.jpg');
    color: navajowhite;
}

.header-flexbox {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.nav-flexbox {
    display: flex;
    flex-direction: row;
    justify-content: center;
}

.nav-flexbox li {
    margin: 5px;
    padding: 5px;
    list-style: none;
}

.nav-flexbox a {
    color: white;
}

.nav-flexbox a:hover {
    color: blue;
}

.flexbox-master {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
}

footer {
    display: flex;
    justify-content: center;
}