body {
    background-color:#ffffff;
    color:#222222;
    font-family:sans-serif;
    font-size:1em;
    line-height:1.5em;
    margin:0;
}

div:focus {
    outline: none;
}

.header {
    position: fixed;
    top: 0; height: 8em;
    left: 0; width: 100%;
    padding: 2em;
}

.navigation {
    position: fixed;
    top: 8em; bottom: 2em;
    left: 2em; width: 14em;
    overflow: auto;
    border-style: solid;
    border-width: thin;
}

.content {
    position: fixed;
    top: 8em; bottom: 0;
    left: 18em; right: 0;
    overflow: auto;
    padding: 0 2em 2em 0;
}


hr {
    margin:2em 0;
}

ul {
    list-style-type: disc;
}


.headerContent {
    display: flex;
    justify-content: center;
    align-items: center;
}

.header h1 {
    margin: 0 0 0 0.5em;
}