body { display: flex; flex-wrap: wrap; font-family: sans; }
header { flex-basis: 100%; flex-shrink: 0; }
article { flex-basis: 60%; padding-left: 1em; }
footer { flex-basis: 100%; flex-shrink: 0; }
header nav { display: flex; justify-content: space-between; }
nav a, header a { text-decoration: none ; color: inherit; }
header h1 span { margin-left: 1em; font-size: 50%; font-style: italic; }
body > nav { flex-basis: content; padding-right: 1vw; min-width: 16em; }
nav ul { display: flex; flex-direction: column; list-style-type: none; list-style-position: outside; padding-left: 0;  }
nav li ul { padding-left: 0.6em }
footer { display: flex; justify-content: space-between; }

/* body */
body { background-color: #ffdab3 }

/* header and top bar */
header h1 { border: 2px solid #ac8760; background-color: #ffe6cc; border-radius: 25px; padding-left: 15px; padding-bottom: 5px }
header nav { background-color: #ffe6cc; border: 2px solid #ac8760; border-radius: 15px; padding-left: 10px; padding-top: 2px; padding-bottom: 4px; }
header nav div a { text-decoration: underline; color: #54402c; }

/* sidebar */
body > nav { background-color: #ffe6cc; margin-right: 25px; border: 2px solid #ac8760; border-radius: 25px; padding-left: 10px; }

/* article */
body > article { background-color: #ffe6cc; border: 2px solid #ac8760; border-radius: 25px; }

/* footer */
footer { margin: 5px }