body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: 100%;
    line-height: 1.3em;
    margin: 0;
}

header {
    background-color: #eee;
    height: 50vh;
    display:  flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

header>* {
    line-height: 1.3em;
    margin: 0;
    text-wrap: balance;
}
h1 {
    text-align: center;
    line-height: 1em;
}
h2 {
    font-size: 10vw;
    order: 1;
}

nav {
    order:  1;
}

ul.toplinks {
    list-style: none;
    padding: 0;
    display: flex;
    flex-flow: row;
    gap: 1em;
}


.toplinks a {
    text-decoration: none;
    border: 2px solid #888;
    border-radius: 5px;
    padding: .15em .2em .25em;
}

main {
    margin: 1em;
    display: flex;
    flex-flow: column; /* flex-direction, plus flex-wrap */
    gap: 2em;
}

.primary {
    flex: 55;
}

.secondary {
    flex: 34;
}

/* wide screen layout*/
@media screen and (min-width: 650px) {

        main {
            flex-flow: row;
            align-items: center;
        }
}

@media screen and (min-width: 960px) {
    body {
        width: 960px;
        margin: 0 auto;
        box-shadow: 0 0 .5em #000;
    }
    h2 {
        font-size: 96px;
    }
}