body {
    background-color: black;
    color: red;
    font-family: "Lucida Console", monospace;
    display: flex;
    flex-flow: row wrap;
}

.body > * {
    flex: 1 100%;
}

.navigation {
    background-color: red;
    color: black;
    font-size: 2rem;
}

.content{
    font-size: 4rem;
    padding: 1rem;
}

.explainer{
    font-size: 1rem;
}

a {
    color: inherit;
}

img {
    max-width:100%;
}

.navigation-list, .navigation-item {
    list-style: none;
    padding: 0;
    margin: 0 0.5rem 0.5rem 0.5rem;
}

.footer {
    display: none;
}

@media all and (min-width: 0px) {
    .navigation { flex: 1 auto;}
}

@media all and (min-width: 800px) {
    .navigation { order: 1; }
    .content    {
        order: 2;
        flex: 7 0;
    }
    .footer  { order: 3; }
}